FCC ID: ZMOFM101CG LTE Module

FM101-CG Hardware Guide V1.0 Copyright 2021 Fibocom Wireless Inc. All rights reserved. Without the prior written permission of the copyright holder, any company or individual is prohibited to excerpt, copy any part of or the entire document, or transmit the document in any form. The document is subject to update from time to time owing to the product version upgrade or other reasons. Unless otherwise specified, the document only serves as the user guide. All the statements, information and suggestions contained in the document do not constitute any explicit or implicit guarantee. Copyright Notice Trademark The trademark is registered and owned by Fibocom Wireless Inc. Contact Website: https://www.fibocom.com/en/

Address: Floor 10, Building A, Shenzhen International Innovation Valley, First Stone Road, Xili Community, Xili Street, Nanshan District, Shenzhen Tel: +86 755-26733555 Contents Contents Change History . 5 1. Foreword. 6 1.1. Document Description . 6 1.2. Safety Instructions . 6 2. Product Overview . 8 2.1. Product Introduction. 8 2.2. Product Specifications . 8 2.2.1. Radio Frequency Features . 8 2.2.2. Other Key Features . 9 2.3. Supported CA Combinations . 11 2.4. Functional Block Diagram . 11 2.5. Evaluation Board . 12 3. Pin Definition . 13 3.1. Pin Distribution. 13 3.2. Pin Function . 14 4. Electrical Characteristics . 21 4.1. Limit Voltage Range . 21 4.1.1. Absolute Limit Voltage . 21 4.1.2. Recommended Operating Voltage . 21 4.2. Power Consumption . 22 5. Functional Interface . 24 5.1. Power Supply . 24 5.2. Control Interface . 26 5.2.1. Power on/off . 26 5.2.1.1. Power on . 26 5.2.1.2. Power-on Sequence. 27 Copyright Fibocom Wireless Inc. 1 Contents 5.2.1.3. Power Off . 27 5.2.2. Reset . 28 5.3. LED1# . 29 5.4. (U)SIM Card Interface . 30 5.4.1. (U)SIM Pin Definition . 30 5.4.2. (U)SIM Interface Circuit . 31 5.4.3. (U)SIM Card Hot Plug . 32 5.4.4. (U)SIM Design Requirements . 33 5.5. USB Interface . 34 5.5.1. USB Interface Circuit . 34 5.5.2. USB Routing Rules . 35 5.5.2.1. USB 2.0 Routing Rules . 35 5.5.2.2. USB 3.0 Routing Rules . 35 5.6. I2C Interface . 36 5.7. PCM and I2S Digital Audio Interface . 36 5.7.1. PCM Interface Definition . 36 5.7.2. PCM Application Circuit . 37 5.8. PCIe Interface . 38 5.8.1. PCIe Routing Rules . 39 5.8.2. PCIe Application Circuit . 40 5.9. Flight Mode Control Interface . 41 5.10. Sleep/Wakeup Interface . 42 6. Radio Frequency. 43 6.1. RF Interface . 43 6.1.1. RF Interface Function . 43 6.1.2. RF Connector Performance. 43 6.1.3. RF Connector Dimensions . 44 6.2. Operating Bands . 45 6.3. Transmitting Power. 45 Copyright Fibocom Wireless Inc. 2 Contents 6.4. Receiving Sensitivity . 46 6.5. GNSS Receiving Performance. 46 6.6. Antenna Design . 47 6.7. PCB Routing Design . 47 6.7.1. Routing Rules. 47 6.7.2. Impedance Design . 48 6.7.3. 3W Principle . 48 6.7.4. Impedance Design for Four-layer Board . 48 6.8. Main Antenna Design . 50 6.8.1. External Antenna. 50 6.8.2. Internal Antenna . 51 6.8.2.1. Design Principle of Internal Antenna . 51 6.8.2.2. Internal Antenna Classification . 52 6.8.3. Surrounding Environment Design of Internal Antenna . 57 6.8.3.1. Handling of Speaker . 57 6.8.3.2. Handling of Metal Structural Parts . 57 6.8.3.3. Handling of Battery . 57 6.8.3.4. Location of Large Components in Antenna Area . 58 6.8.4. Common Problems of Internal Antenna Overall Design . 58 6.9. Diversity and MIMO Antenna Design . 59 6.10. GNSS Antenna Design . 60 6.11. Other Interfaces . 60 7. Thermal Design. 61 8. Electrostatic Protection. 62 9. Structural Specifications. 63 9.1. Product Appearance . 63 9.2. Structural Dimensions . 63 9.3. Package . 64 9.4. Storage. 65 Copyright Fibocom Wireless Inc. 3 Appendix A: Acronyms and Abbreviations . 67 Contents Copyright Fibocom Wireless Inc. 4 Change History Change History V1.0 (2021-11-17) Initial version. Copyright Fibocom Wireless Inc. 5 1. Foreword 1. Foreword 1.1. Document Description This document describes the electrical characteristics, RF performance, dimensions and application environment, etc. of the FM101-CG wireless module. With the assistance of this document and other related documents, application developers can quickly understand the hardware functions of the FM101-CG module and develop product hardware. 1.2. Safety Instructions By following the safety guidelines below, you can ensure your personal safety and help protect the product and work environment from potential damage. Product manufacturers need to communicate the following safety instructions to end users. Fibocom Wireless does not assume any responsibility for the consequences caused by users' misuse because they do not comply with these safety rules. Road safety first! When you are driving, do not use any handheld mobile device even if it has a hand-free feature. Stop the car before making a call. Please turn off the mobile device before boarding. The wireless feature of the mobile device is not allowed on the aircraft to prevent interference with the aircraft communication system. Ignoring this note may result in flight safety issue or even violate the law. When in a hospital or health care facility, please be aware of restrictions on the use of mobile devices. Radio frequency interference may cause medical equipment to malfunction, so it may be necessary to turn off the mobile device. Copyright Fibocom Wireless Inc. 6 1. Foreword The mobile device does not guarantee that an effective connection can be made under any circumstances, for example, when there is no prepayment for the mobile device or (U)SIM is invalid. When you encounter the above situation in an emergency, please remember to use emergency calls, and ensure that your device is turned on and in an area with strong signal. Your mobile device receives and transmits RF signals when it is powered on. Your mobile device will receive and transmit RF signals when it is turned on. RF interference occurs when it is near a TV, radio, computer, or other electronic device. Keep mobile device away from flammable gases. Turn off the mobile device when you are near to gas stations, oil depots, chemical plants or explosive workplaces. There are potential safety hazards when operating electronic equipment in any potentially explosive area. Copyright Fibocom Wireless Inc. 7 2. Product Overview 2. Product Overview 2.1. Product Introduction Fibocom FM101-CG module is designed based on Qualcomm SDX12 platform, supporting Cat 6 network level, and supporting CA network architecture. FM101-CG integrates Baseband, Memory, PMIC, Transceiver, PA and other core devices, supporting TDD-LTE. The maximum downlink rate supported in CA mode is 261 Mbps, and the maximum uplink rate is 30 Mbps. FM101-CG is designed with M.2 package and is applicable to various scenarios such as CPE, VR/AR, gateway, Internet TV set-top box, and intelligent monitoring. 2.2. Product Specifications 2.2.1. Radio Frequency Features Table 1. Operating band System TDD-LTE FM101-CG Band 42/43/48 Table 2. Transmission capacity System FM101-CG LTE DL peak rate 261 Mbps UL peak rate 30 Mbps DL 4 2 MIMO Copyright Fibocom Wireless Inc. 8 2. Product Overview Table 3. Modulation features System FM101-CG LTE Support 3GPP R12 Support DL 64QAM, 16QAM and QPSK modulations Support UL 16QAM and QPSK modulation Support RF bandwidth 5 MHz to 20 MHz Qualcomm SDX12, 14nm process, single-core ARM Cortex-A7, up to 2.2.2. Other Key Features Table 4. Other key features Item Description Power supply DC: 3.135 V4.4 V Typical voltage: 3.8 V Processor 1.28 GHz Storage 2Gb LPDDR2 + 2Gb NAND Flash Supported systems Power class Satellite positioning Linux/Android/Windows Class 3 (23dBm 2dB) for LTE bands GPS/GLONASS/Galileo/BDS SMS Support Audio interface Support PCM/I2S digital audio interface A group of USB 3.0 superspeed (SS) interfaces with data transmission rate up to 5 Gbps Compatible with USB 2.0 highspeed (HS) interfaces, with data USB interface transmission rate up to 480 Mbps Used for AT command transmission, data transmission, software debugging, software upgrading, etc. Copyright Fibocom Wireless Inc. 9 2. Product Overview Item Description PCIe interface mode is supported PCIe Gen2 x 1Lane, the maximum transmission rate is 5GT/s, and RC 2 groups of SIM card interfaces, supporting dual SIM single standby SIM interface Support USIM: 1.8 V and 3 V I2C interface 1 group I2C with a maximum speed of 3.4 Mbps Dimensions: 30 mm 42 mm 2.3 mm Physical characteristic Packaging: M.2 Weight: TBD Operating temperature: 30C to 75C The module works normally within this temperature range, and the related performance meets the requirements of 3GPP standards. Extended temperature: 40C to 85C The module works normally within this temperature range, and the Temperature range baseband and RF functions are normal. However, some indicators may exceed the range of 3GPP standards. When the temperature returns to the normal working range of the module, all the indicators of the module meet the requirements of 3GPP standards. Storage temperature: 40C to 90C The storage temperature range of the module when the module is powered off. Through USB interface/FOTA RoHS and halogen-free Software upgrade Environmental standards Copyright Fibocom Wireless Inc. 10 2. Product Overview 2.3. Supported CA Combinations Table 5. CA combinations supported by FM101-CG Combination 2DLCA FM101-CG B42C B48C 2.4. Functional Block Diagram Functional block diagram shows the main hardware functions of the FM101-CG module, including the baseband and RF functions. USB, PCIe, (U)SIM, PCM/I2S, I2C LTE TDD controller Baseband section CPU PMIC LPDDR2 NAND RF section RF Transceiver RF PA RF Switch RF filter Antenna Copyright Fibocom Wireless Inc. 11 2. Product Overview Figure 1. Functional block diagram 2.5. Evaluation Board Fibocom provides EVB-M.2 evaluation board to facilitate module debug and testing. For how to use it, see FIBOCOM EVB-M2 User Guide. Copyright Fibocom Wireless Inc. 12 3. Pin Definition 3. Pin Definition 3.1. Pin Distribution figure shows the pin mapping. The FM101-CG module uses M.2 packaging and have 75 pins in total. The following Figure 2. Pin mapping Copyright Fibocom Wireless Inc. 13 3. Pin Definition Power supply Power supply Power supply Power supply CMOS 3.3V/1.8V 0.3V3V 3.2. Pin Function The FM101-CG module pin function is described in the following table. Table 6. M.2 pin function description Pin Number Reset Status Pin Name I/O Pin Description Type NC, WWAN-PCIe is configured for FM101-CG module, USB_SS CONFIG_3 DO NC interface type M.2 module

1 2 3 4 5 6 7 8 9 VCC PI

Power input GND

Ground VCC PI

Power input GND

Ground FULL_CARD_ Module on/off control, high-level POWER_OFF DI PU on, low-level off; internal pull-up

USB_DP DIO

USB 2.0 data +

W_DISABLE1 Turn off WWAN of the module, CMOS DI PU i.e. flight mode, active low 3.3V/1.8V USB_DM DIO USB 2.0 data 0.3V3V 10 LED1#

OD System status indication, open

drain output

T Copyright Fibocom Wireless Inc. 14 11 12 13 14 15 16 17 18 19 20 22 23 24 3. Pin Definition Type Power supply

CMOS 1.8V CMOS 1.8V CMOS 1.8V CMOS 1.8V Pin Number Pin Name I/O Pin Description Reset Status GND

Ground Notch Notch Notch Notch Notch Notch Notch Notch

Notch groove Notch groove Notch groove Notch groove Notch groove Notch groove Notch groove Notch groove I2S_SCK DO PD I2S serial clock, reserved 21 CONFIG_0

NC NC, WWAN-PCIe is configured for FM101-CG module, USB_SS interface type M.2 module

I2S_RX DI PD I2S serial data receiving, reserved WOWWAN#

DO PD Wakeup host I2S_TX DO PD reserved I2S serial data transmission, 25 DPR DI PU interrupt detection, active low, Dynamic power control for SAR reserved CMOS 3.3V/1.8V Copyright Fibocom Wireless Inc. 15 Pin Number Reset Status Pin Name I/O Pin Description Type W_DISABLE2

DI PU GNSS positioning is disabled, CMOS active low, reserved 3.3V/1.8V GND

Ground I2S byte selection, left and right CMOS I2S_WA DO PD USB_SS_TX_ M DO channels, reserved Ultra high speed USB data transmitting negative

L

L L

UIM1_RESET DO SIM card 1 reset USB_SS_TX_P AO Ultra high speed USB data transmitting positive UIM1_CLK DO SIM card 1 clock GND

Ground UIM1_DATA DIO SIM card 1 data USB_SS_RX_ AI M UIM1_PWR PO USB_SS_RX_P AI WAKEUP_IN DI Ultra high speed USB data receiving negative SIM card 1 power supply, 3V/1.8V Ultra high speed USB data receiving positive Peripheral wake-up module control signal 3. Pin Definition Power supply 1.8V CMOS 3V/1.8V CMOS 3V/1.8V Power supply CMOS 3V/1.8V CMOS 3V/1.8V

CMOS 1.8V 26 27 28 29 30 31 32 33 34 35 36 37 38 Copyright Fibocom Wireless Inc. 16 Pin Number Pin Name I/O Pin Description Reset Status 39 GND

Ground SIM2_DETEC DI T SIM card 2 detection, and external pull-up and pull-down are required. A card is available at high level by default, SPI_MISO (Reserved) PETn0 DO PCIe data transmitting negative

UIM2_DATA DIO SIM card 2 data, SPI_MOSI

(Reserved) PETp0 DO PCIe data transmitting positive

UIM2_CLK DO SIM card 2 clock, SPI_CLK

(Reserved) GND

Ground UIM2_RESET DO SIM card 2 reset, SPI_CS(Reserved) PERn0 DI PCIe data receiving negative UIM2_PWR PO SIM card 2 power supply PERp0 DI PCIe data receiving positive PERST#

DI PD Active low, and an external pull-

Module PCIe interface reset. up resistor is required

L

L L

40 41 42 43 44 45 46 47 48 49 50 51 GND

Ground 3. Pin Definition Type Power supply CMOS 1.8V CMOS 3V/1.8V CMOS 3V/1.8V Power supply CMOS 3V/1.8V CMOS 3V/1.8V

CMOS 3.3V/1.8V Power supply Copyright Fibocom Wireless Inc. 17 Pin Number Reset Status Pin Name I/O Pin Description Type PCIe clock request signal, active low, open drain output, an external pull-up resistor needs CMOS 3.3V/1.8V to be reserved PCIe reference clock differential negative signal PCIe wake-up signal, active low, pull-up resistor is required PCIe reference clock differential 52 CLKREQ#

DIO T 53 REFCLKN DIO

54 PEWAKE#

DO T open drain output, an external 55 56 57 58 59 60 61 62 REFCLKP DIO

positive signal RFFE_SCLK DO PD RFFE-MIPI serial clock signal, I2C_SCL (Reserved) GND

Ground RFFE_SDATA DIO PD GRFC7*

DO PD COEX3/GPIO 86 DI

GRFC6*

DO PD RFFE-MIPI serial data signal, I2C_SDA (Reserved) Tuning antenna control bit, LTE/WLAN common control Tuned antenna control bit 1, reserved signal reserved reserved COEX_UART_ RXD*

LTE and WLAN share a serial DI

port receiving signal line, 3. Pin Definition CMOS 3.3V/1.8V

CMOS 1.8V Power supply CMOS 1.8V CMOS 1.8V CMOS 1.8V CMOS 1.8V CMOS 1.8V Copyright Fibocom Wireless Inc. 18 Pin Number Pin Name I/O Pin Description Reset Status 63 GRFC5*

DO PD Tuned antenna control bit 2, COEX_UART_ TXD*

LTE and WLAN share a serial DO

port transmission signal line, GRFC4*

DO PD Tuned antenna control bit,

reserved reserved reserved UIM1_DETEC T DI PU SIM card 1 detection, external pull-up and pull-down are required. A card is available at high level by default RESET_N DI PU Module reset. Active low I2S_MCLK DO

I2S MCLK clock output 69 CONFIG_1 DO GND GND, WWANPCIe is configured for the FM101-CG module, USB_SS interface type M.2 module VCC PI

Power input GND

Ground VCC GND PI

Power input Ground 64 65 66 67 68 70 71 72 73 3. Pin Definition Type CMOS 1.8V CMOS 1.8V CMOS 1.8V CMOS 1.8V

Power supply Power supply Power supply Power supply Copyright Fibocom Wireless Inc. 19 Pin Number Pin Name I/O Pin Description Reset Status 74 VCC PI

Power input 75 CONFIG_2 DO NC NC, WWAN-PCIe is configured for FM101-CG module, USB_SS interface type M.2 module

3. Pin Definition Type Power supply Pins marked with * are reserved functions or under development. Unused pins remain floating. Table 7. I/O parameter description Type PI PO DI DO DIO AI AO AIO OD Description Power input Power output Digital input Digital output Digital input/output Analog input Analog output Analog input/output Open drain Copyright Fibocom Wireless Inc. 20 4. Electrical Characteristics 4. Electrical Characteristics 4.1. Limit Voltage Range The limit voltage includes the absolute limit voltage and the operating limit voltage. The absolute limit voltage is the maximum voltage that the module can bear, beyond which the module may be damaged. The operating limit voltage is the normal operating voltage range of the module, beyond which the module will have an abnormal performance. 4.1.1. Absolute Limit Voltage The following table describes the absolute limit voltage ranges of FM101-CG module. Table 8. Absolute limit voltage range Parameter Description Typical Value VBAT Power supply Digital IO level supply GPIO voltage Minimum Value (V) 0.3 0.3 3.8 1.8 Maximum Value (V) 4.75 2.1 4.1.2. Recommended Operating Voltage Table 9. Recommended operating voltage (signal) Logical low level Logical high level Signal Minimum Maximum Minimum Maximum Value (V) Value (V) Value (V) Value (V) Digital input 0.3 Digital output 0 RESET_N FCPO#

0.3 0.3 0.36 0.45 0.5 0.5 0.7 VDD VDD + 0.3 VDD 0.45 1.25 1.25 VDD 1.89 1.89 Copyright Fibocom Wireless Inc. 21 4. Electrical Characteristics Table 10. Recommended operating voltage (power supply) Minimum Value (V) Typical Value Maximum Value (V) Parameter VBAT USIM1_VDD USIM2_VDD I/O PI PO PO 3.135 1.75/2.8 1.75/2.8 4.2. Power Consumption 3.8 1.8/2.85 1.8/2.85 4.4 1.85/2.928 1.85/2.928 The power consumption of FM101-CG module measured under 3.8 V power supply is described in the following table. For AT commands used for USB sleep and wakeup, see Fibocom_FM101_AT Commands User Manual. Average Current Typical Value (mA) Table 11. Power consumption Parameter Mode Status Ioff Isleep Power off Module power-off TDD-LTE Paging Cycle #64 (USB sleep) TDD-LTE Paging Cycle #256 (USB sleep) Radio Off AT+CFUN=0 (USB sleep) Iidle TDD-LTE Paging Cycle #32 (USB wakeup) Paging Cycle #64 (USB wakeup) Paging Cycle #128 (USB wakeup) Paging Cycle #256 (USB wakeup) Band42 @+23dBm ILTE-RMS(10MHz 1RB) TDD-LTE Band43 @+23dBm Band48 @+23dBm 0.06 3.3 2.2 1.8 33 32 31 31 450 450 450 Copyright Fibocom Wireless Inc. 22 4. Electrical Characteristics 2CA Typical Combination Typical Current (mA) Table 12. 2CA power consumption Transmitting Band@FRB@Data Transmission Status B42+B42 @+21dBm B48+B48 @+21dBm TBD TBD 42C 48C Copyright Fibocom Wireless Inc. 23 5. Functional Interface 5. Functional Interface 5.1. Power Supply The following table describes the power interface of FM101-CG module. Table 13. Power interface Pin Name I/O Pin Number Description 2,4, 70, 72, 74 recommended Module power supply, 3.135V4.4V, 3.8V is 3, 5, 11, 27, 33, 39, 45, 51, 57, 71, 73 GND, all GND pins must be grounded VBAT GND PI G Power Input The FM101-CG module is powered on through the VBAT pin. The following figure shows the recommended power supply design. Figure 3. Recommended power supply design Copyright Fibocom Wireless Inc. 24 5. Functional Interface The filter capacitor design of power supply is shown in the following table. Table 14. Power supply filter capacitor design Recommended Capacitor Application Description 330uF x 2 Voltage stabilizing adopt low ESR capacitor, which is not less capacitor than 440uF, and the driving capacity of To reduce the power supply fluctuation when the module works, it is required to VBAT power supply current is not less than 2.0 A. Filter out interference caused by clock and 1uF, 100nF Digital signal noise digital signals. 33pF 850 MHz/900 MHz band Filter out low band RF interference 1800/1900/2100/2300/

Filter out middle/high band RF 8.2pF 2500/2600 MHz band interference. Stable power supply ensures proper operating of the FM101-CG module. During design, ensure that the power supply ripple is less than 300 mV (circuit ESR < 100 m). When the module is working in maximum load, ensure that the power supply voltage is not lower than 3.135V. Otherwise, the module may power off or restart. When the module is working in Burst transmit state, the power limit is shown in the following figure. Figure 4. Power supply limit Copyright Fibocom Wireless Inc. 25 5. Functional Interface 5.2. Control Interface are defined in the following table. The module has three control signals for power on/off and reset of the module. The pins Table 15. Control signal Pin Name I/O Description Pin Number RESET_N DI 67 to 3s, and then release it. The module is reset. The In the power-on state, pull down RESET_N for 0.5s chip is internally pulled up. Module on/off signal, pull up to power on, and pull down to power off. In the power-off state, pull up the FCP# for more than 1.2s. The module is powered on. FULL_CARD_ POWER_OFF DI 6

#(3.3V/1.8V) 5.2.1. Power on/off 5.2.1.1. Power on When the module power-on pin FCPO# (FULL_CARD_POWER_OFF#) is connected to an external voltage of 3.3 V or 1.8 V, the module is powered on. When the AP (Application Processor) controls the power-on of the module, it is recommended to use GPIO with the reset status of low or internal pull-down. Copyright Fibocom Wireless Inc. 26 5. Functional Interface Figure 5. AP controls the power-on circuit of the module 5.2.1.2. Power-on Sequence The following figure shows the power-on sequence. Figure 6. Power-on sequence (FCPO#) Before pulling the FCPO# pin high, ensure that the VBAT voltage is stable. It is recommended that the time interval between powering on VBAT and pulling low or high the power-on control pin is not less than 40ms. The power-on control is automatically pulled up inside the module. 5.2.1.3. Power Off When the module is powered on, pull down FCPO#, and the module is powered off. The Copyright Fibocom Wireless Inc. 27 recommended power-off sequence is shown in the following figure. 5. Functional Interface Figure 7. Recommended power-off sequence 5.2.2. Reset Reset Method Hardware reset FM101-CG module can be reset by hardware and software. Table 16. Reset methods Action Pull down the RESET_N pin for 0.5s or more, and then release Software reset Send the AT+CFUN=15 command Figure 8. OC drive reset reference circuit Copyright Fibocom Wireless Inc. 28 5. Functional Interface S1 RESET_N TVS Close to S1 Figure 9. Button reset reference circuit Figure 10. Reset sequence It is recommended to wait at least 20 seconds between two reset operations. The RESET pin can be internally pulled up, without external pull-up. Keep the pin floating when it is not used. 5.3. LED1#

the table below. The LED1# signal is used to indicate the operating status of the module, as described in Copyright Fibocom Wireless Inc. 29 5. Functional Interface Table 17. Network status indication Module Operating Mode LED1# Signal RF function is enabled Low level (LED on) RF function is disabled High level (LED off) The LED driver circuit is shown in the following figure. Figure 11. Reference circuit of network status indicators FM101-CG module has built-in (U)SIM card interface, and supports 1.8 V and 3.0 V 5.4. (U)SIM Card Interface

(U)SIM cards. 5.4.1. (U)SIM Pin Definition

(U)SIM pin definition is described in the following table. Table 18. (U)SIM pin definition Pin Name UIM1_RESET UIM1_CLK I/O DO DO UIM1_DATA DIO Reset Status L L L Description USIM1 reset USIM1 clock USIM1 data UIM1_PWR PO

USIM1 power supply Pin Number 30 32 34 36 Type 1.8V/3V 1.8V/3V 1.8V/3V 1.8V/3V Copyright Fibocom Wireless Inc. 30 Pin Number Pin Name I/O Description Reset Status 40 SIM2_DETECT DI

42 44 46 48 UIM2_DATA DIO UIM2_CLK UIM2_RESET UIM2_PWR DO DO PO L L L

5. Functional Interface Type 1.8V 1.8V/3V 1.8V/3V 1.8V/3V 1.8V/3V USIM2 detection Active high by default. And high level indicates a SIM card is inserted; and low level indicates a SIM card is removed. USIM1 data USIM1 clock USIM1 reset USIM1 power supply USIM1 detection Active high by default. And high level indicates a SIM card is inserted; and low level indicates a SIM card is removed. 66 SIM1_DETECT DI

1.8V 5.4.2. (U)SIM Interface Circuit

(U)SIM Card Slot with Card Detection Signal

(U)SIM card slot should be selected for (U)SIM design. It is recommended to use (U)SIM card slot with hot plug detection function. The following figure shows the reference design circuit. When (U)SIM card is inserted, USIM_DET pin is at high level, when (U)SIM card is removed, USIM_DET pin is at low level. Copyright Fibocom Wireless Inc. 31 5. Functional Interface Card connector GND VDD DAT CLK RST VPP CD VDD DAT CLK RST VPP CD F u 1 0

. F p 3 3 C N C N C N 20K Card connector F u 1 0

. F p 3 3 C N C N C N GND VDD-EXT-1V8 K 7 4 K 7 4 K 0 2 Module USIM1_VDD USIM1_DATA USIM1_CLK USIM1_RST USIM1_DET USIM2_VDD USIM2_DATA USIM2_CLK USIM2_RST USIM2_DET 22R 22R 22R 1K 22R 22R 22R 1K Figure 12. (U)SIM card slot with card detection signal 5.4.3. (U)SIM Card Hot Plug The FM101-CG series module supports the (U)SIM card hot plug function. The module detects the status of the USIM1_DET/USIM2_DET pin to determine whether a (U)SIM card is inserted or removed. USIM1_DET/USIM2_DET is active high by default (if the card is at high level, the card is inserted; otherwise, the card is removed). The hot plug detection can be enabled/disabled by the AT command as follows. Table 19. (U)SIM card hot plug function configuration AT Command Function Remark AT+MSMPD=1 enabled Default setting

(U)SIM card hot plug detection is Copyright Fibocom Wireless Inc. 32 5. Functional Interface AT Command Function Remark AT+MSMPD=0 disabled Effective after restart

(U)SIM card hot plug detection is 5.4.4. (U)SIM Design Requirements

(U)SIM circuit design must meet EMC standards and ESD requirements, and at the same time, EMS capability must be improved to ensure that the (U)SIM can work stably. The following points need to be strictly observed in the design:

(U)SIM card slot should be located as close to the module as possible, and kept away from the RF antenna, DCDC power, clock signal lines and other strong interference sources.

(U)SIM card slot is covered by metal shield shell to improve EMS. The routing length from the module to the (U)SIM card slot shall not exceed 100 mm. Longer cable will reduce signal quality. The USIM_CLK and USIM_DATA signal lines are grounded and isolated to avoid mutual interference. If conditions do not permit, at least the (U)SIM signal must be The filter capacitor and ESD device of the (U)SIM card signal line are placed close to grounded as a set. the (U)SIM card slot. The total capacitance of the equivalent capacitance and the parallel filter capacitance of the ESD device is less than 47pF. USIM_DATA requires a pull-up resistor of 20K to USIM_VDD. Refer to the specification of (U)SIM card slot for PCB packaging design. The PCB surface layer under the 6 contactors should be keepout to avoid short circuit caused by the contactor pricked to the copper plane. Copyright Fibocom Wireless Inc. 33 5. Functional Interface 5.5. USB Interface FM101-CG module supports USB 3.0 (5 Gb/s) ultra-high-speed data transmission, and is also compatible with USB high-speed (480 Mb/s) for download, debugging, data transmission and other functions. USB pin definition is shown in the following table. Table 20. USB pin definition Pin Number Description USB 2.0 differential data signal (+) USB 2.0 differential data signal () USB 3.0 differential transmitting signal () USB 3.0 differential transmitting signal (+) USB 3.0 differential receiving signal () USB 3.0 differential receiving signal (+) Pin Name USB_DP USB_DM USB_SS_TX_M USB_SS_TX_P USB_SS_RX_M USB_SS_RX_P I/O AIO AIO AO AO AI AI 7 9 29 31 35 37 5.5.1. USB Interface Circuit The USB interface reference circuit is shown in the following figure. Figure 13. Reference design of USB interface circuit Copyright Fibocom Wireless Inc. 34 5. Functional Interface 5.5.2. USB Routing Rules 5.5.2.1. USB 2.0 Routing Rules recommended. layout:

9010. Since the module supports USB 2.0 High-Speed, TVS Junction capacitance on the USB_D+/D differential signal line must be less than 1 pF, and a 0.5 pF TVS is USB_D and USB_D+ are high speed differential signal lines with the maximum transmission rate of 480 Mbit/s. The following rules must be strictly followed in PCB USB_D and USB_D+ signal lines should have the differential impedance of USB_D and USB_D+ signal line difference must be less than 2mm in length and parallel, avoiding the right-angle routing. USB_D and USB_D+ signal lines should be routed on the layer that is closest to the ground layer, and protected with GND all around. 5.5.2.2. USB 3.0 Routing Rules USB_SS_RX_P/USB_SS_RX_M and USB_SS_TX_P/USB_SS_TX_M are two groups of differential signals, with differential impedance controlled at 907; the trace length difference within the differential pair is controlled to 0.15 mm, and the trace length difference between the differential groups is controlled to 10 mm. Minimize vias during high-speed cabling to ensure continuous impedance. USB 3.0 signals are super speed differential signal lines with the maximum theoretical transfer rate of 5Gbps. The following rules shall be followed carefully in PCB layout:

USB_SS_TX_P/USB_SS_TX_M and USB_SS_RX_P/USB_SS_RX_M are two pairs of differential signal lines, and their differential impedance should be controlled as 907. Traces in the differential pair must be parallel with equal length, and the length Copyright Fibocom Wireless Inc. 35 5. Functional Interface difference should be controlled less than 0.15 mm, avoiding right-angle traces. Traces between differential pairs must be parallel with equal length, and the length difference should be controlled less than 10 mm, avoiding right-angle traces. The two pairs differential signal lines should be routed on the layer that is closest to the ground layer, and protected with GND all around. 5.6. I2C Interface FM101-CG series module supports 1-way I2C interface, and the standard I2C specification, version 3.0 is applied. I2C external pull-up is required. See Figure 14 for reference design. Table 21. I2C pin definition Pin Name Pin Type Description I2C_SDA I2C_SCL Number 42 43 OD OD I2C data signal I2C clock signal 5.7. PCM and I2S Digital Audio Interface The FM101-CG module provides a digital audio interface (PCM/I2S) for communication with external codec and other digital audio devices. 5.7.1. PCM Interface Definition PCM interface signals include transmission clock PCM_CLK, frame synchronization signal PCM_SYNC, and input and output PCM_IN/PCM_OUT. Copyright Fibocom Wireless Inc. 36 5. Functional Interface Table 22. PCM pin definition Pin Number Description Pin Name I2S_SCK I2S_RX I2S_TX I/O IO DI DO 20 22 24 28 68 PCM clock signal, I2S_SCLK(Reserved), UART1_RTS(Reserved) PCM input signal, I2S_D0(Reserved), UART1_RX(Reserved) PCM output signal, I2S_D1(Reserved), UART1_CTS(Reserved) UART1_TX(Reserved) I2S_WA IO PCM sync signal, I2S_WS(Reserved), I2S_MCLK DO I2S main clock signal (reserved) Default transmission clock frequency is TBD MHz, sampling rate is TBD KHz, and resolution is TBD bit. The PCM channel can also be configured as I2S interface. Please contact Fibocom technical support for adjustment. 5.7.2. PCM Application Circuit The application reference circuit of the external Codec chip of the PCM interface is shown in the following figure. Copyright Fibocom Wireless Inc. 37 5. Functional Interface Figure 14. Reference circuit of the PCM interface external Codec chip 5.8. PCIe Interface FM101-CG module supports a group of PCIe GEN 2.0 x 1 lanes. Pin Name PETn0 PETp0 PERn0 PERp0 PERST#

CLKREQ#

REFCLKN I/O DO DO DI DI DI DIO DIO PEWAKE#

DO Table 23. PCIe pin definition Pin Number Description PCIe data transmitting signal negative PCIe data transmitting signal positive PCIe Data receiving signal negative PCIe Data receiving signal positive PCIe mode reset signal PCIe clock request signal with external pull-up PCIe reference clock signal negative PCIe RC mode wake-up signal with external pull-up 41 43 47 49 50 52 53 54 55 Copyright Fibocom Wireless Inc. 38 REFCLKP DIO PCIe reference clock signal positive 5. Functional Interface 5.8.1. PCIe Routing Rules FM101-CG module supports PCIe 2.0 x1, including three differential pairs:

transmitting pair TXP/N, receiving pair RXP/N and clock pair CLKP/N. PCIe can achieve the maximum transmission rate of 5GT/s. The following rules must be strictly followed in PCB layout:

The differential signal pairs are required to be parallel traces with equal length, and the difference in length is less than 0.15 mm. The differential signal pair traces shall be as short as possible and be controlled within 15 inch (380 mm) for AP end. The impedance of differential signal pair traces is controlled to be 10010%. Avoid discontinuous reference ground, such as segment and space. When the differential signal traces go through different layers, the via hole of ground signal should be close to that of signal, and generally, each pair of signals require 1-3 ground signal via holes and the traces shall never cross the segment of plane. Try to avoid bended traces and avoid introducing common-mode noise in the system, which will influence the signal integrity and EMI of differential pairs. As shown in the following Figure, the bending angle of all traces should be equal to or greater than 135, the spacing between differential pair traces should be larger than 20mil, and the traces caused by bending should be greater than 1.5 times trace width at least. When a serpentine route is used for length match with another route, the bended length of each segment shall be at least 3 times the route width

( 3W). The largest spacing between the bended part of the serpentine trace and another one of the differential traces must be less than 2 times the spacing of normal differential traces (S1 < 2S). Copyright Fibocom Wireless Inc. 39 5. Functional Interface Figure 15. PCIe routing requirements The difference in length of two data lines in differential pair should be within 0.15 mm, and the length match must be met for all parts. When the length match is conducted for the differential lines, the designed position of correct match should be close to that of incorrect match, as shown in the following figure. However, there is no specific requirements for the length match of transmitting pair and receiving pair, that is, the length match is only required in the internal differential lines rather than between different differential pairs. The length match should be close to the signal pin and pass the small-angle bending routing design. Figure 16. Length match design of PCIe difference pair 5.8.2. PCIe Application Circuit Please refer to the following figure for PCIe application circuit, and Fibocom_FM101-

NA_Reference Design for details. Copyright Fibocom Wireless Inc. 40 5. Functional Interface Figure 17. PCIe application circuit 5.9. Flight Mode Control Interface W_DISABLE_N pin is described in the following table. Table 24. W_DISABLE_N pin description Pin Name I/O Pin Number Description W_DISABLE_N DI 26 Module flight mode control (internal pulled up by default) FM101-CG module supports two ways as described in the following table to enter flight mode:

Copyright Fibocom Wireless Inc. 41 5. Functional Interface Table 25. Ways for module to enter flight mode Send AT+GTFMODE=1 to turn on the hardware control flight Hardware GPIO interface control mode function; pulled up or float the pin The module is in normal mode when W_DISABLE# pin is pulled up by default. When this pin is pulled down, the module enters flight mode. The module uses software to control the flight mode by AT command default. When AT+GTFMODE=0:

control run the AT+CFUN=0 command to enter flight mode. run the AT+CFUN=1 command to enter normal mode. 1 2 5.10. Sleep/Wakeup Interface When the module is in sleep mode, the module can be awakened by pulling down WAKEUP_IN pin. Table 26. Sleep/wakeup interface Pin Name I/O Pin Number Description WAKEUP_IN DI 38 External device wake-up module, active low by default The module supports setting wake-up mode and waking up active level through AT commands. For details of configuration method, see Fibocom_FM101-NA_AT Commands User Manual. Copyright Fibocom Wireless Inc. 42 6. Radio Frequency 6. Radio Frequency 6.1. RF Interface 6.1.1. RF Interface Function The FM101-CG module supports three RF connectors used for external antenna connection. As shown in the following figure, "M" refers to the RF main antenna for receiving and transmitting RF signals; "D" refers to the diversity antenna for receiving diversity RF signals; "G" refers to GNSS antenna. 6.1.2. RF Connector Performance Rated Condition Environmental Condition Frequency range Characteristic impedance Temperature range DC to 6 GHz 50 40 to +85 Copyright Fibocom Wireless Inc. 43 6. Radio Frequency 6.1.3. RF Connector Dimensions FM101-CG module adopts standard M.2 module RF connectors, the model name is 818004607 from ECT company, and the connector dimensions are 2 mm 2 mm 0.6 mm, as shown in the following figure. Figure 18. RF connector dimensions Figure 19. 0.81 mm coaxial cable matched RF connector dimensions Copyright Fibocom Wireless Inc. 44 6. Radio Frequency Figure 20. 0.81 mm coaxial cable snap-in RF connector dimensions 6.2. Operating Bands Table 27. Operating bands Band Mode Transmit (MHz) Receive (MHz) Band 42 LTE TDD 3400~3600 3400~3600 Band 43 LTE TDD 3600~3800 3600~3800 Band 48 LTE TDD 35503700 35503700 6.3. Transmitting Power The following table describes the RF output power of FM101-CG module. Table 28. Output power Band LTE TDD Minimum Value Maximum Value

< 40 dBm 23 dBm 2 dB Copyright Fibocom Wireless Inc. 45 6. Radio Frequency 6.4. Receiving Sensitivity Table 29. FM101-CG dual antenna receiving sensitivity Mode Band Main Set Sensitivity Diversity Sensitivity Typ (dBm) Typ (dBm) LTE TDD Band 42 Band 43 Band 48

-97

-97

-97 6.5. GNSS Receiving Performance The GNSS of FM101-CG module supports GPS/GLONASS/BDS/GALILEO, and the performance parameters of GNSS are shown in the following table. Indicator Performance Sensitivity TTFF Table 30. GNSS performance parameters Description Result Cold start Acquisition Tracking Cold Start Warm Start Hot Start 39

-145

-156 40 35 3 3 Static Accuracy Nominal accuracy The above data is an average value obtained by testing some samples at 25C.

-98

-98

-98 Unit dB-Hz dBm dBm s s s m Copyright Fibocom Wireless Inc. 46 6. Radio Frequency 6.6. Antenna Design Antenna indicators The antenna requirements for FM101-CG module are described in the following table. Table 31. Module Antenna Requirements FM101-CG module main antenna requirements LTE GNSS VSWR: 2 Input power: > 28dBm Input impedance: 50 Antenna gain: < 3.6dBi Antenna isolation: > 25dB Antenna correlation coefficient: < 0.5 Frequency range: 1559 MHz1609 MHz Polarization direction: right-circular or linear polarization VSWR: < 2:1 Passive antenna gain: > 0dBi 6.7. PCB Routing Design 6.7.1. Routing Rules For modules that dont have a RF connector, customers need to route a RF trace to connect to the antenna feeding point or connector. It is recommended to use a microstrip line. The shorter the better. The insertion loss should be controlled less than 0.2dB; and impedance should be controlled within 50. Add a -type circuit (two parallel-component- grounded pins are connected directly to the main GND) between the module and antenna connector (or feeding point) for antenna debugging. This signal line impedance is controlled within 50 during PCB cabling, and the RF Copyright Fibocom Wireless Inc. 47 performance is closely related to this cabling. PCB parameters that will affect the cabling 6. Radio Frequency impedance include:

Trace width and thickness Dielectric constant and thickness of media Thickness of pad Distance from ground line Nearby traces 6.7.2. Impedance Design The RF impedance of the two antennas interface should to be controlled within 50. In practical application, RF routing mode is designed according to other parameters of PCB, such as reference layer thickness, number of layers and stacking. Different reference GND layer will lead to different routing design. 6.7.3. 3W Principle follow "3W principle". During antenna RF signal cabling design on PCB, the first thing you need to consider is to In order to reduce crosstalk between the lines, please ensure that line spacing is large enough. If the line spacing is at least 3 times of the line width, 70% of the electric field between the lines will not interfere with each other, and this is called "3W principle". Figure 21. 3W principle 6.7.4. Impedance Design for Four-layer Board The thickness of four-layer board is 1.0 mm. RF line is routed on Lay 1, and reference Copyright Fibocom Wireless Inc. 48 layer is on Lay 2 (GND layer). The stacking varies with PCB vendor, the following figure is taken as an example. 6. Radio Frequency Figure 22. Four layers (1+2+1) thickness Table 32. Four-layer board stacking thickness Thickness (um) Material Solder Mask 0.33OZ+Plating PP 1080 0.5OZ+Plating 0.510 mm+Plating PP 1080 0.33OZ+Plating Solder Mask

25 65 25 25 65 25

0.510 mm (H/H OZ) 508 Layer Lay 1 Lay 2 Lay 3

Lay 4 The thickness from Lay 1 to Lay 2 is 65 um, RF trace is 4 mil, and the distance from RF to GND is greater than 3 times of RF line width. The blue area is Lay 1 and the red area is Lay 2, the highlighted part is RF line. Copyright Fibocom Wireless Inc. 49 6. Radio Frequency Figure 23. RF traces 50 impedance calculation:

If the value of D1 exceeds 3 times of W1, it has weak effect on impedance. Figure 24. Impedance calculation for four-layer board top layer trace 6.8. Main Antenna Design 6.8.1. External Antenna The external antenna has good performance. The antenna is placed outside the complete machine, the antenna space is large, and the antenna performance is not easy to be Copyright Fibocom Wireless Inc. 50 affected by the internal environment of the complete machine, so that the antenna does not need to be independently designed for each project. The compatibility is good. Most of the interfaces of such antennas are SMA interfaces. 6. Radio Frequency Figure 25. External antenna 6.8.2. Internal Antenna 6.8.2.1. Design Principle of Internal Antenna Placement The antenna shall be arranged in the corners of the module. Avoid placing metal elements near the antenna. The shielding parts shall be as neat as possible. Do not use long strip shaped hole Components with metal structure, such as horn, vibrator, and camera base plate Avoid using long FPC. If a long FPC is required, add grounding shields on both slots. shall be grounded. sides. Routing When connecting RF routing, apply circular arc treatment at the turning, take grounding and pay attention to characteristic impedance. Copyright Fibocom Wireless Inc. 51 6. Radio Frequency RF ground shall be designed properly, PCB board and edge of ground shall be provided with "ground wall", and antenna led from RF module shall be made into microstrip line. The antenna RF feeding point pad is a round rectangular pad with the size of 2 mm 3 mm. All layers of PCB that include the pad and surrounding and that are equal to and greater than 0.8 mm are not covered with copper. The center distance between RF and ground pad shall be between 4 mm and 5 mm. 6.8.2.2. Internal Antenna Classification There are three kinds of internal antennas: PIFA, IFA and monopole. Internal antennas may form interference and other potential problems in the product, so there are more requirements in the design. The following table describes the differences of these three types of antennas. Table 33. Antenna differences Antenna Antenna Antenna Electrical Feed Volume Property SAR Below Antenna Projection Ground Type PIFA MONOPOLE No ground Good Slightly high Large Small Very good Low IFA Ground Medium About good Medium 2 1 2 PIFA antenna Antenna structure There are two feeding points between the antenna and main board, one is module output, and the other is RF ground. It is recommended to design the antenna on the top of the device. The distance between the signal point and GND point should be at least 4 mm to 5 mm. The signal point and GND point can be put in different places, and more GND points mean more choices during antenna design. Copyright Fibocom Wireless Inc. 52 6. Radio Frequency Figure 26. Location of the signal point and GND point of PIFA Main board There is complete paving in the antenna projection area. Do not place any component in the antenna area. The recommended length of PCB board should be 90 mm to 110 mm. The antenna performance is better if the board length is 105 mm. Structure of PIFA antenna Bracket boasts a higher cost. Attached Feed point of PIFA antenna The antenna consists of plastic bracket and metal sheet (radiator). Plastic bracket and metal sheet are fixed by hot melt method. The plastic is made of BS or PC material, the metal sheet is beryllium copper, phosphor copper, or stainless steel. If you want to use FPC, add two pins in the main board, which Attach the metal sheet (radiator) to the back cover of the module. The feeding point must be greater than 2mm 3mm. Try to place it at the edge of the PCB board, and adopt round shape. Square with rounded corners is also preferred. The distance between feeding point pad and ground should be equal to or greater than 1mm. Copyright Fibocom Wireless Inc. 53 6. Radio Frequency Figure 27. Pad design requirement Requirements on height and area Operating Band GSM/DCS GSM/DCS/PCS Height

> 6mm

> 6.5mm Area

> 15mm 40mm

> 17mm 40mm GSM850/GSM900/DCS1800/PC S1900

> 8mm

> 20mm 45mm For details about LTE antenna design, refer to the area requirement of GSM antenna. Monopole antenna Antenna structure There is one feeding point between the antenna and main board, which is module output. It is recommended to design the antenna on the top of the device. The following figure shows the monopole antenna design. Copyright Fibocom Wireless Inc. 54 6. Radio Frequency Antenna 5.0mm 9.0mm PCB motherboard Figure 28. Antenna location Main board 95mm. There should be no paving or PCB in the antenna projection area. Do not place any component in the antenna area. The recommended length of PCB board should be 80 mm to 100 mm. The antenna performance is improved if the board length is Antenna PCB motherboard Figure 29. Requirements for antenna projection area Structure of monopole antenna For details, see Structure of PIFA antenna. Feed point of monopole antenna For details, see Feed point of PIFA antenna. The height and area requirements for monopole antenna are described in the following table. Operating Band GSM/DCS GSM/DCS/PCS Height

> 5 mm

> 6 mm Area

> 35 mm 7 mm

> 35 mm 8 mm Copyright Fibocom Wireless Inc. 55 6. Radio Frequency Operating Band Height Area GSM850/GSM900/DCS1800/PC S1900

> 6 mm

> 40 mm 10 mm For details about LTE antenna design, refer to the area requirement of GSM antenna. IFA antenna IFA antenna shares similarity with Monopole antenna and PIFA antenna. IFA antenna has two feeding branches, and allows ground under the antenna. The antenna has better stability than Monopole antenna, and the antenna space requirement is between Monopole antenna and PIFA antenna. Antenna area Ant connector PCB motherboard Figure 30. Location of signal point and GND point Antenna space requirement: monopole < IFA < PIFA. For other requirements, refer to the PIFA and monopole requirements. Copyright Fibocom Wireless Inc. 56 6. Radio Frequency 6.8.3. Surrounding Environment Design of Internal Antenna 6.8.3.1. Handling of Speaker Connecting beads or inductors on speaker can reduce the impact on RF. 6.8.3.2. Handling of Metal Structural Parts All the metal structural parts must be grounded correctly and reliably, and the circuit part must be shielded. 6.8.3.3. Handling of Battery The battery should be far away from antenna. Monopole antenna: The distance between battery and antenna is equal to or PIFA antenna: The distance between battery and antenna is equal to or greater than 5 mm. greater than 3 mm. Do not put the battery connector right beside the antenna. Copyright Fibocom Wireless Inc. 57 6. Radio Frequency 6.8.3.4. Location of Large Components in Antenna Area Do not place large metal components such as oscillator, speaker, and receiver around the antenna; they may greatly affect the electrical performance of antenna. Do not spray the cover of the antenna with conductive paint; be cautious when you use plating. Figure 31. Location of large components 6.8.4. Common Problems of Internal Antenna Overall Design Factors that would affect transmitting performance As the internal antenna is sensitive to the nearby medium, so the design of shell is closely related to antenna performance. Copyright Fibocom Wireless Inc. 58 6. Radio Frequency Poor speaker layout will affect antenna performance. Poor battery layout will affect antenna performance. Factors that would affect receiving performance If both the conductive performance of module and the radiated power of antenna meet requirement, then low sensitivity may be caused by main board design issue. Poor coupling sensitivity is caused by poor circuit design of LCD, LDO, and DC/DC. Device receiving performance is affected by VCXO or TVCXO harmonic of 19.2MHZ, 26MHZ, and 38.4MHZ systems. Poor coupling sensitivity is caused by SIM card clock. Poor FPC layout affects the receiving performance of the device. Factors that would affect electromagnetic compatibility (EMC) Poor FPC layout affects EMC performance of the device. The metal element may absorb the antenna radiated power and produce a certain amount of secondary radiation, and coupling frequency is associated with the size of metal parts. Therefore, this kind of component should have a good grounding to eliminate or reduce secondary radiation. 6.9. Diversity and MIMO Antenna Design Diversity receiving technology is a main anti fading technology, which can greatly improve the transmission reliability in multipath fading channels. Its essence is to use two or more different methods to receive the same signal to overcome the fading and improve the receiving performance of the system. Diversity antenna can also multiplex different transmission paths in space using division multiplexing technology and receive data from the multiple different paths in parallel to improve the receiving throughput. The function of MIMO antenna is similar to that of diversity antenna, and they both Copyright Fibocom Wireless Inc. 59 6. Radio Frequency can resist against fading and improve throughput. The customer is recommended to design the corresponding antenna according to the antenna requirements of each module antenna port. The design method of diversity antenna and MIMO antenna is consistent with that of main antenna. It is recommended to control the difference of the efficiency of diversity antenna and MIMO antenna from that of main antenna by no more than 3dB. The isolation of each antenna shall be greater than 25dB, and the antenna correlation coefficient shall be less than 0.5. High isolation does not mean good correlation coefficient. Customers need to evaluate two indexes separately. The isolation and correlation coefficient of antenna generally depend on:

Antenna isolation Antenna type Antenna directivity 6.10. GNSS Antenna Design The GNSS antenna can use a passive antenna or an active antenna. If the active antenna is used, the module supports the internal power supply to the active antenna, with the power supply voltage of 2.928V, and the power supply needs to be started with the AT command. 6.11. Other Interfaces For the application of other interfaces, please refer to the recommended design. If the application scenario and the recommended design are not consistent, please contact FIBOCOM technicians for confirmation. Copyright Fibocom Wireless Inc. 60 7. Thermal Design 7. Thermal Design FM101-CG module is designed to be workable on an extended temperature range, to make sure the module can work properly for a long time and achieve a better performance under extreme temperatures or extreme working conditions, such as high temperatures and high speed data transfer, it is required to add a exposed copper area at the corresponding motherboard position on the back of the FM101-CG module, and use a thermal conductive material to connect the module and the motherboard in this area to ensure that the heat of the module can be released through the motherboard. The following fogure shows the design. Other measures to improve heat dissipation performance are as follows:

Heat devices and other heat sources on the motherboard are as far away from the The ground plane of the motherboard under the module is as complete as possible, and as many ground holes are drilled as possible to increase heat dissipation module as possible. capability. Use screws to secure the module and motherboard to ensure good contact between the motherboard and the module. The use of heat sinks above the module is preferred, followed by the motherboard below the module. Copyright Fibocom Wireless Inc. 61 8. Electrostatic Protection 8. Electrostatic Protection Although the ESD problem has been considered and ESD protection has been completed in the FM101-CG module design, the ESD problem may also occur in transportation and secondary development. Developers should consider ESD protection in the final product. In addition to ESD in packaging, customers should consider the recommended circuit of the interface design in the document during module application. The following table describes the ESD discharge range allowed by the FM101-CG module. Table 34. Allowed ESD discharge range Air Discharge Contact Discharge Location VBAT, GND Antenna interface Other interfaces 15 KV 15 KV 2 KV 8 KV 8 KV 1 KV Copyright Fibocom Wireless Inc. 62 9. Structural Specifications 9. Structural Specifications 9.1. Product Appearance The appearance of the FM101-CG module is shown in the following figure. Figure 32. Product appearance 9.2. Structural Dimensions The structural dimensions of the FM101-CG module is shown in the following figure. The unit is mm. Copyright Fibocom Wireless Inc. 63 9. Structural Specifications Figure 33. Structural dimensions 9.3. Package The FM101-CG module uses the tray sealed packing, combined with the outer packing method using the hard cartoon box, so that the module can be protected to the greatest extent in the processes of storage, transportation and usage. The module is a precision electronic product, and may suffer permanent damage if no correct electrostatic protection measures are taken. Tray Package The FM101-CG module uses tray package. 20 pcs are packed in one tray. 5 trays covering an empty tray on top are packed in one box. 5 boxes are packed in one case. Copyright Fibocom Wireless Inc. 64 9. Structural Specifications Figure 34. Tray package Tray Size following figure. The tray size of FM101-CG module is 330 mm 175 mm 6.5 mm, as shown in the Figure 35. Tray size (unit: mm) 9.4. Storage humidity is less than RH 60%. Storage conditions (recommended): The temperature is 23 5, and the relative Copyright Fibocom Wireless Inc. 65 Storage period: Under the recommended storage conditions, the storage life is 12 months. 9. Structural Specifications Copyright Fibocom Wireless Inc. 66 Appendix A: Acronyms and Abbreviations Appendix A: Acronyms and Abbreviations bps Bits Per Second CA Carrier Aggregation DLCA Downlink Carrier Aggregation DRX Discontinuous Reception Imax Maximum Load Current LED Light Emitting Diode LTE Long Term Evolution ME MS MT Mobile Equipment Mobile Station Mobile Terminated PCB Printed Circuit Board PDU Protocol Data Unit RF Radio Frequency RMS Root Mean Square RTC Real Time Clock Copyright Fibocom Wireless Inc. 67 Appendix A: Acronyms and Abbreviations Rx Receive SMS Short Message Service TE TX Terminal Equipment Transmitting Direction TDD Time Division Duplexing UART Universal Asynchronous Receiver & Transmitter

(U)SIM

(Universal) Subscriber Identity Module Vmax Maximum Voltage Value Vnorm Normal Voltage Value Vmin Minimum Voltage Value VIHmax Maximum Input High Level Voltage Value VIHmin Minimum Input High Level Voltage Value VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage Value Copyright Fibocom Wireless Inc. 68 Appendix A: Acronyms and Abbreviations VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio Copyright Fibocom Wireless Inc. 69 OEM/Integrators Installation Manual Important Notice to OEM integrators 1. This module is limited to OEM installation ONLY. 2. This module is limited to installation in mobile or fixed applications, according to Part 2.1091(b). 3. The separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and different antenna configurations 4. For FCC Part 15.31 (h) and (k): The host manufacturer is responsible for additional testing to verify compliance as a composite system. When testing the host device for compliance with Part 15 Subpart B, the host manufacturer is required to show compliance with Part 15 Subpart B while the transmitter module(s) are installed and operating. The modules should be transmitting, and the evaluation should confirm that the module's intentional emissions are compliant (i.e. fundamental and out of band emissions). The host manufacturer must verify that there are no additional unintentional emissions other than what is permitted in Part 15 Subpart B or emissions are complaint with the transmitter(s) rule(s). The Grantee will provide guidance to the host manufacturer for Part 15 B requirements if needed. Important Note notice that any deviation(s) from the defined parameters of the antenna trace, as described by the instructions, require that the host product manufacturer must notify to Fibocom that they wish to change the antenna trace design. In this case, a Class II permissive change application is required to be filed by the USI, or the host manufacturer can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application End Product Labeling When the module is installed in the host device, the FCC ID label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily re-moved. If not, a second label must be placed on the outside of the final device that contains the following text: Contains FCC ID: ZMOFM101CG . The FCC ID can be used only when all FCC compliance requirements are met. Manual Information to the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual Federal Communication Commission Interference Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver

- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. List of applicable FCC rules requirements for Modular Approval. This module has been tested and found to comply with part 22, part 24, part 27, part 90, part 96 The modular transmitter is only FCC authorized for the specific rule parts (i.e., FCC transmitter rules) listed on the grant, and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-

radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. This device is intended only for OEM integrators under the following conditions: (For module device use) 1) The antenna must be installed such that 20 cm is maintained between the antenna and users, and 2) The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator &

your body.

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Confidentiality Letter Date: 2022.01.12 Federal Communications Commission Authorization and Evaluation Division FCC ID: ZMOFM101CG Confidentiality Request customarily released to the public. l Operational Description l Part List l Tune up procedure l Block Diagram l Schematics Lucy Liu Fibocom Wireless Inc. TEL: +86-755-26525092 Pursuant to FCC 47 CRF 0.457(d) and 0.459, we request that a part of the subject FCC application listed below be held permanently confidential and permanently withheld from public review due to materials that contain trade secrets and proprietary information not Further, the Applicant has spent substantial effort in developing this product, some aspects of which are deemed to be trade secret and proprietary. Having the subject information easily available to our competitors in this market would negate the advantage we have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Sincerely yours,

Test Data Reuse Letter This application is intended to reuse previous test data (from FCC ID: ZMOFM101NA, certified on 12/24/2021 of initial application), since the two models of products are hardware-wise identical and only the following changes have been made:

FM101-NA (FCC ID: ZMOFM101NA), FM101-CG (FCC ID: ZMOFM101CG), use identical internal printed circuit board layouts, have a common design and components. the difference only in the depopulation of components for the purposes of removing frequency bands of operation. So, we have performed spot checks on the following items to verify that if any unexpected RF conducted power or emission changes can be noted. The test results show that all spot check data are within the instrument measurement uncertainty and data reuse is justifiable. Verification test items with 1 sample:

l Conducted Power l Conducted Emission Test for the test result please refers to included exhibit Test Reports.pdf for detail Reuse data test items l Conducted Power / EIRP/ ERP / PAPR / OBW / Modulation characteristics / Frequency stability l Radiated Emission / Conducted Emission / Band edge l SAS protocol (Part 96.47 End user device additional requirements), the software remains the same. Also, both the referenced application and this new application are all subject to the same FCC rule and there is no new rule update for related rules. Accordingly, we believe that the reuse data from previous certified filing is justifiable. Thank you for your attention and please feel free to contact us, if you should have any questions. Sincerely yours, Lucy Liu Fibocom Wireless Inc. TEL: +86-755-26525092

Declaration of authorization Date: 2022.01.12 Product Name: LTE Module Model No.: FM101-CG FCC ID: ZMOFM101CG We, the undersigned, hereby authorize MRT Technology (Suzhou) Co., Ltd to act on our behalf, to act on our behalf in all manners relating to FCC approval of our products: report submittal, related correspondence, the signing of all documents relating to these matters, and any other lawful activity necessary to obtain such certification. Any act carried out by MRT Technology (Suzhou) Co., Ltd within the scope of this authorization shall have the same effects as our own. Name Representative of agent: Marlin Chen Agent Company name: MRT Technology (Suzhou) Co., Ltd Address:

D8 Building, Youxin Industrial Park, No.2 Tian'edang Rd., Wuzhong Economic Development Zone, City: Suzhou Country: China If you have any questions regarding the authorization, please dont hesitate to contact us. Sincerely yours, Lucy Liu Fibocom Wireless Inc. TEL: +86-755-26525092

Request for Modular/Limited Modular Approval

- Modular Approval

- Split Modular Approval

- Limited Modular Approval - Limited Split Modular Approval Date: January 14, 2022 Subject: Manufacturers Declaration for Confidentiality Request for: ZMOFM101CG 8 Basic Requirements FCC Part 15.212(a)(1) For Items Marked NO(*), the Limited Module Description Must be Filled Out on the Following Pages Modular Approval Requirement 1. The modular transmitter must have its own RF shielding. This is intended to ensure that the module does not have to rely upon the shielding provided by the device into which it is installed in order for all modular transmitter emissions to comply with FCC limits. It is also intended to prevent coupling between the RF circuitry of the module and any wires or circuits in the device into which the module is installed. Such coupling may result in non-compliant operation. The physical crystal and tuning capacitors may be located external to the shielded radio elements. 15.212(a)(1)(i) Details: < The module contains a metal shield which covers all RF components and circuitry. The shield is located on the top of the board next to antenna connector>

Requirement Met

- YES - NO(*) 2. The modular transmitter must have buffered modulation/data inputs (if such inputs are provided) to ensure that the module will comply with FCC requirements under conditions of excessive data rates or over-modulation. 15.212(a)(1)(ii) Details: <Data to the modulation circuit is buffered as described in the operational description provided with the application>

- YES - NO(*) 3. The modular transmitter must have its own power supply regulation on the module. This is intended to ensure that the module will comply with FCC requirements regardless of the design of the power supplying circuitry in the device into which the module is installed. 15.212(a)(1)(iii) Details: <The module contains its own power supply regulation. Please refer to schematic filed with this application>

- YES - NO(*) 4. The modular transmitter must comply with the antenna and transmission system requirements of 15.203, 15.204(b), 15.204(c), 15.212(a), and 2.929(b). The antenna must either be permanently attached or employ a unique antenna coupler (at all connections between the module and the antenna, including the cable). The professional installation provision of 15.203 is not applicable to modules but can apply to limited modular approvals under paragraph 15.212(b). 15.212(a)(1)(iv) Details: <The module connects to its antenna using an UFL connector which is considered a non-standard connector. A list of antennas tested and approved with this device may be found in users manual provided with the application>

- YES - NO(*) 5. The modular transmitter must be tested in a stand-alone configuration, i.e., the module must not be inside another device during testing. This is intended to demonstrate that the module is capable of complying with Part 15 emission limits regardless of the device into which it is eventually installed. Unless the transmitter module will be battery powered, it must comply with the AC line conducted requirements found in Section 15.207. AC or DC power lines and data input/output lines connected to the module must not contain ferrites, unless they will be marketed with the module (see Section 15.27(a)). The length of these lines shall be length typical of actual use or, if that length is unknown, at least 10 centimeters to insure that there is no coupling between the case of the module and supporting equipment. Any accessories, peripherals, or support equipment connected to the module during testing shall be unmodified or commercially available (see Section 15.31(i)). 15.212(a)(1)(v) Details: <The module was tested stand-alone as shown in test setup photographs filed with this application>

- YES - NO(*) 6. The modular transmitter must be labeled with its own FCC ID number, or use an electron Modular Approval Requirement Requirement Met display (see KDB Publication 784748). If using a permanently affixed label with its own FCC ID number, if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains Transmitter Module FCC ID:

ZMOFM101CG or Contains FCC ID: ZMOFM101CG Any similar wording that expresses the same meaning may be used. The Grantee may either provide such a label, an example of which must be included in the application for equipment authorization, or, must provide adequate instructions along with the module which explain this requirement. In the latter case, a copy of these instructions must be included in the application for equipment authorization. If the modular transmitter uses an electronic display of the FCC identification number, the information must be readily accessible and visible on the modular transmitter or on the device in which it is installed. If the module is installed inside another device, then the outside of the device into which the module is installed must display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains FCC certified transmitter module(s). Any similar wording that expresses the same meaning may be used. The user manual must include instructions on how to access the electronic display. A copy of these instructions must be included in the application for equipment authorization. 15.212(a)(1)(vi) Details: <There is a label on the module as shown in the labeling exhibit filed with this application. Host specific labeling instructions are shown in the installation manual .filed with this application.>

- YES - NO(*) 7. The modular transmitter must comply with all specific rule or operating requirements applicable to the transmitter, including all the conditions provided in the integration instructions by the grantee. A copy of these instructions must be included in the application for equipment authorization. For example, there are very strict operational and timing requirements that must be met before a transmitter is authorized for operation under Section 15.231. For instance, data transmission is prohibited, except for operation under Section 15.231(e), in which case there are separate field strength level and timing requirements. Compliance with these requirements must be assured. 15.212(a)(1)(vii) Details: <The module complies with FCC rules requirements. Instructions to the OEM installer are provided in the installation manual filed with this application.>

- YES - NO(*) 8. The modular transmitter must comply with any applicable RF exposure requirements. For example, FCC Rules in Sections 2.1091, 2.1093 and specific Sections of Part 15, including 15.319(i), 15.407(f), 15.253(f) and 15.255(g), require that Unlicensed PCS, UNII and millimeter wave devices perform routine environmental evaluation for RF Exposure to demonstrate compliance. In addition, spread spectrum transmitters operating under Section 15.247 are required to address RF Exposure compliance in accordance with Section 15.247(b)(4). Modular transmitters approved under other Sections of Part 15, when necessary, may also need to address certain RF Exposure concerns, typically by providing specific installation and operating instructions for users, installers and other interested parties to ensure compliance. 15.212(a)(1)(viii) Details: < The module meets RF exposure in mobile configuration.>

- YES - NO(*) 070920-02b Limited Module Description When Applicable

* If a module does NOT meet one or more of the above 8 requirements, the applicant may request Limited Modular Approval

(LMA). This Limited Modular Approval (LMA) is applied with the understanding that the applicant will demonstrate and will retain control over the final installation of the device, such that compliance of the end product is always assured. The operating condition(s) for the LMA; the module is only approved for use when installed in devices produced by grantee. A description regarding how control of the end product, into which the module will be installed, will be maintained by the applicant/manufacturer, such that full compliance of the end product is always ensured should be provided here. Details: <example - N/A>

Software Considerations KDB 594280 / KDB 442812 (One of the following 2 items must be applied) Requirement 1. For non-Software Defined Radio transmitter modules where software is used to ensure compliance of the device, technical description must be provided about how such control is implemented to ensure prevention of third-party modification; see KDB Publication 594280. Details: <example The firmware of the device can not be modified or adjusted by the end user as described in a separate cover letter filed with this application. >

- Provided in Separate Cover Letter Requirement Met

- N/A 2. For Software Defined Radio (SDR) devices, transmitter module applications must provide a software security description; see KDB Publication 442812.

- Provided in Separate Cover Letter

- N/A Details: <example N/A>

Requirement 1. For split modular transmitters, specific descriptions for secure communications Provided in Manual Split Modular Requirements between front-end and control sections, including authentication and restrictions on third-party modifications; also, instructions to third-party integrators on how control is maintained. Details: <example N/A >

- Provided in Separate Cover Letter

- N/A 070920-02b OEM Integration Manual Guidance KDB 996369 D03 Section 2 Clear and Specific Instructions Describing the Conditions, Limitations, and Procedures for third-parties to use and/or integrate the module into a host device. Requirement

- YES Is this module intended for sale to third parties?

- No, If No, and LMA applies, the applicant can optionally choose to not make the following detailed info public. However there still needs to be basic integration instructions for a users manual and the information below must still be included in the operational description. If the applicant wishes to keep this info confidential, this will require a separate statement cover letter explaining the module is not for sale to third parties and that integration instructions are internal confidential documents. Items required to be in the manual See KDB 996369 D03, Section 2 As of May 1, 2019, the FCC requires ALL the following information to be in the installation manual. Modular transmitter applicants should include information in their instructions for all these items indicating clearly when they are not applicable. For example information on trace antenna design could indicate Not Applicable. Also if a module is limited to only a grantees own products and not intended for sale to third parties, the user instructions may not need to be detailed and the following items can be placed in the operational description, but this should include a cover letter as cited above. 1. List of applicable FCC rules. KDB 996369 D03, Section 2.2 a. Only list rules related to the transmitter. 2. Summarize the specific operational use conditions. KDB 996369 D03, Section 2.3 a. Conditions such as limits on antennas, cable loss, reduction of power for point to 3. Limited Module Procedures. KDB 996369 D03, Section 2.4 point systems, professional installation info a. Describe alternative means that the grantee uses to verify the host meets the necessary limiting conditions b. When RF exposure evaluation is necessary, state how control will be maintained such that compliance is ensured, such as Class II for new hosts, etc. 4. Trace antenna designs. KDB 996369 D03, Section 2.5 a. Layout of trace design, parts list, antenna, connectors, isolation requirements, tests for design verification, and production test procedures for ensuring compliance. If confidential, the method used to keep confidential must be identified and information provided in the operational description. 5. RF exposure considerations. KDB 996369 D03, Section 2.6 a. Clearly and explicitly state conditions that allow host manufacturers to use the module. Two types of instructions are necessary: first to the host manufacturer to define conditions (mobile, portable xx cm from body) and second additional text needed to be provided to the end user in the host product manuals. 6. Antennas. KDB 996369 D03, Section 2.7 a. List of antennas included in the application and all applicable professional installer instructions when applicable. The antenna list shall also identify the antenna types (monopole, PIFA, dipole, etc note that omni-directional is not considered a type) 7. Label and compliance information. KDB 996369 D03, Section 2.8 a. Advice to host integrators that they need to provide a physical or e-label stating Contains FCC ID: with their finished product 8. Information on test modes and additional testing requirements. KDB 996369 D03, Section 2.9 a. Test modes that should be taken into consideration by host integrators including clarifications necessary for stand-alone and simultaneous configurations. b. Provide information on how to configure test modes for evaluation 9. Additional testing, Part 15 Subpart B disclaimer. KDB 996369 D03, Section 2.10

- All Items shown to the left are provided in the Modular Integration Guide (or UM) for Full Modular Approval (MA) or LMA.

- An LMA applies and is approved ONLY for use by the grantee in their own products, and not intended for sale to 3rd parties as provided in a separate cover letter. Therefore the information shown to the left is found in the theory of operation. Sincerely, Fibocom Wireless Inc. TEL: +86-755-26525092 070920-02b

Statement We Fibocom Wireless Inc. declare the following models. Product Name: LTE Module Model Number: FM101-CG FM101-NA and FM101-CG use identical internal printed circuit board layouts, have a common design and components, and where the separate FCC IDs differ only in the depopulation of components for the purposes of removing frequency bands of operation. FCC ID HWID ZMOFM101NA ZMOFM101CG HWID 2/1/0: HHH HWID 2/1/0: HHH List 4G LTE categories and technology supported List FDD/TDD LTE Frequency bands supported WCDMA List 3GPP CA combinations supported

(both DL and UL CA) FDD/TDD, DL: CAT6, UL:CAT6 TDD, DL: CAT6, UL:CAT6 LTE FDD: Band 2, 4, 5, 7, 12, 13, 14, 17, 25, 26, 29, 30, 66, 71 LTE TDD: Band 41, 42, 43, 46, 48 Band 2,4,5 CAT6 supports:

DL_2CA N/A CAT6 supports:

DL_2CA LTE TDD: Band 42, 43, 48 PCB Layout Confirm HPUE Support YES No main/div/GNSS Not support UL CA LTE FDD: Band 2, 4, 5, 7, 12, 13, 14, 17, 25, 26, 29, 30, 66, 71 LTE TDD: Band 41, 42, 43, 46, 48 LTE TDD: Band 42, 43, 48 main/div/GNSS Not support UL CA Above changes wont impact the protocol and RF performance for same frequency bands. Your assistance on this matter is highly appreciated. Antenna port UL MIMO (2*2) DL MIMO (2*2) Sincerely, Lucy Liu Fibocom Wireless Inc. TEL: +86-755-26525092