ZTE MG2636 GSM/GPRS MODULE User Manual 0602

ZTE Corporation GSM/GPRS MODULE 0602

Users Manual

MG2636 modules MG2636 Module User Manual Version: V1.0 ZTE Corporation
MG2636 module 1Copyright Statement Copyright © 2010 by ZTE Corporation All rights reserved. No part of this publication may be excerpted, reproduced, translated or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without the prior written permission of ZTE Corporation. is the registered trademark of ZTE Corporation. All other trademarks appeared in this manual are owned by the relevant companies. ZTE Corporation reserves the right to make modifications on print errors or update specifications in this manual without prior notice. ZTE Corporation keeps the right to make the final explanation to this manual.
MG2636 module 2With strong technical force, ZTE Corporation can provide CDMA/GPRS module customers with the following all-around technical support: 1. Provide complete technical documentation; 2. Provide the development board used for R&D, test, production, after-sales, etc.; 3. Provide evaluations and technical diagnosis for principle diagram, PCB, test scenarios; 4. Provide test environment; ZTE Corporation provides customers with onsite supports, and also you could get supports through telephone, website, instant communication, E-mail, etc. The module website module.ztemt.com.cn provides the relevant industry information and module technical documentation. The authorized module customers could download the latest technical documentation for our website. If you have more requirements, you could send an E-mail to module@zte.com.cn. You can also call us at 0755-86360280 for more supports.
MG2636 module 3Preface Summary This user manual is for MG2636 modules. It takes MG2636 modules for example to give the reference to the relevant hardware design and instruct the users how to quickly and conveniently design different kinds of wireless terminals based on this type of module. Target Readers  System designing engineers  Mechanical engineers  Hardware engineers  Software engineers  Test engineers Brief Introduction This manual contains 5 chapters. See the table below: Chapter Contents 1 General description Introduces MG2636 module’s basic technical specification, the relevant documents for reference and the acronyms. 2 Product introduction Introduces MG2636 module’s principle diagram. 3 PIN definitions Introduces the name and function of MG2636 module’s Pins. 4 Description of hardware interfaces Introduces the design of the hardware interface on each part of MG2636 module. 5 Mechanical Design Introduces MG2636 module’s appearance diagram, assembly diagram and PCB layout diagram. 6 Antenna Interface Introduce MG2636 Antenna Interface. Update History V1.0（2010-10-09） This is the first time to officially release the document.
MG2636 module 4Contents 1 General Description ...................................................................................................................................... 7 1.1 Technical Specification ................................................................................................................................. 7 1.1.1 Module’s Specification ..................................................................................................................... 7 1.1.2 Basic Functions ................................................................................................................................ 7 1.1.3 Module’s Interfaces .......................................................................................................................... 7 1.1.4 Technical parameters ........................................................................................................................ 8 1.2 Relevant Documents ..................................................................................................................................... 9 1.3 Acronyms ...................................................................................................................................................... 9 2 Product Introduction ................................................................................................................................... 12 3 PIN Definitions .......................................................................................................................................... 13 4 Decription of Hardware Interfaces ......................................................................................................... 15 4.1 Summary ..................................................................................................................................................... 15 4.2 Power and Reset ......................................................................................................................................... 15 4.2.1 Power Design ................................................................................................................................. 15 4.3 COM Port ................................................................................................................................................... 16 4.4 SIM Card Interface ..................................................................................................................................... 17 4.5 Audio Interface ........................................................................................................................................... 18 4.6 PCM Interface ............................................................................................................................................. 19 4.7 USB2.0 Interface ........................................................................................................................................ 20 4.8 Antenna Interface ........................................................................................................................................ 25 5 Mechanical Design .................................................................................................................................... 21 5.1 Appearance Diagram .................................................................................................................................. 21 5.2 Module Assembly Diagram ........................................................................................................................ 22 5.3 Module’s Fixing Method ............................................................................................................................ 22 6 Antenna Interface……………………………………………………………….………………………..24 6.1 Antenna Installation……………………………………………………………………………….…24 6.2 Antenna Pad…………………………………………………………………………………….……24 6.3 Antenna Connector…………………………………………………………………….…………..…24 6.4 Antenna Subsystem…………………………………………………………………………..………25 Important compliance information for North American users……………..………..……………………..26
MG2636 module 5Graphics Figure 2-1 MG2636 Function Block Diagram .................................................................................................... 12 Figure 3-1 PIN Definitions .................................................................................................................................. 13 Figure 4-1 UART Interface Reference Design Diagram ..................................................................................... 17 Figure 4-2 SIM Card Circuit Reference Design Diagram ................................................................................... 18 Figure 4-3 Audio Interface Circuit Refrence Design Diagram ........................................................................... 18 Figure 4-4 PCM Interface’s Time Sequence ..................................................................................................... 19 Figure 4-5 USB Interface Circuit Reference Design Diagram ............................................................................ 18 Figure 5-1 MG2636 Module’s Appearance ......................................................................................................... 21 Figure 5-2 Module’s Assembly Diagram ............................................................................................................ 22 Figure 6-3 Specification of MM9329-2700B connector………………………………………………………...24
MG2636 module 6Tables Table 1-1 Module’s specification ………………………………………………………………………………7 Table 1-2 Basic functions ………………………………………………………………………………………7 Table 1-3 Interfaces of the modules…………………………………………………………………………... 7 Table 1-4 Technical parameters ……………………………………………………………………………….8 Table 3-1 PIN definitions…………………………………………………………………………………….. 13 Table 3-1 PIN definitions…………………………………………………………………………………….. 13 Table 4-1 Voltage characteristics……………………………………………………………………………. 15
MG2636 module 7 1 General Description This manual is applicable for MG2636 modules. With the function of voice, SMS and data service, ZTE MG2636 module is a type of GSM/GPRS module developed by ZTE Corporation. MG2636 module could be easily applied in modem, U-modem, embedded module, wireless phone, intelligent mobile phone, multimedia mobile phone and touch screen telecom devices, etc. Taking MG2636 module for example, this manual describes the module’s logic structure, hardware interface & major functions, and provides references to the hardware and mechanical design. 1.1 Technical Specification 1.1.1 Module’s Specification Please refer to table 1-1 for the module’s specification. Table 1-1 Module’s specification Models Format Frequency(MHz) MG2636 GSM/GPRS GSM/GPRS：GSM850/EGSM900/DCS1800/PCS1900* *Note: EGSM900 and DCS1800 not support for North American market model, both band have been closed in firmware. 1.1.2 Basic Functions Please refer to Table 1-2 for the basic functions. Table 1-2 Basic functions Item Description Voice call Circuit-switching service Packet data Packet data service SMS Support TEXT 1.1.3 Module’s Interfaces Please refer to Table 1-3 for the module’s interfaces. Table 1-3 Interfaces of the modules
MG2636 module 8 1.1.4 Technical parameters Please refer to Table 1-4 for the module’s technical parameters. Table 1-4 Technical parameters Items Descriptions Working temperature -30°C ~ +75°C Input voltage 3.4V-4.25V Maximum current 1800mA @ -102 dBm Standby current (average) 10mA @ -75 dBm Call current 230mA @ -75 dBm Rx. Sensitivity -106.5dBm Max. Tx power GSM850，EGSM900：33dBm(2W) GSM1800，PCS1900：30dBm(1W) Frequency range GSM850： Tx: 824~849 MHz Rx: 869~894 MHz EGSM900 Tx: 880~915 MHz Rx: 925~960MHz DCS1800 Tx: 1710~1785MHz Rx: 1805~1880MHz PCS1900 Tx: 1850~1910MHz Rx: 1930~1990MHz Antenna Gain 2dBi 2. GSM/GPRS Item GSM 850MHz/900MHz GSM 1800MHz/1900MHz Out Power （GSM） 2W (+33dBm) 1W (+30dBm) Interfaces Descriptions Power interface Supply power to the module, reset the module or turn on/off the module Audio interface Double audio I/O channel, one for differential, one for single end SIM interface R-UIM USB interface USB2.0 High Speed UART interface Hardware full flow control port, customized by software PCM interface Transmit voice data for Bluetooth applications Antenna interface 50 Ohm input resistance control
MG2636 module 9Out Power（EDGE） 500mW (+27dBm) 400mW (+26dBm) Sensitivity ＜-102dBm ＜-102dBm Frequency Error ＜0.1 PPM ＜0.1 PPM Phane Error Max（°） ≤20 ≤20 RMS（°） ≤5 ≤5 1.2 Relevant Documents  《AT Command Manual for ZTE Corporation's MG2636 Modules》  《Wireless Module Test References》 1.3 Acronyms A ADC Analog-Digital Converter AFC Automatic Frequency Control AGC Automatic Gain Control ARFCN Absolute Radio Frequency Channel Number ARP Antenna Reference Point ASIC Application Specific Integrated Circuit B BER Bit Error Rate BTS Base Transceiver Station C CDMA Code Division Multiple Access CDG CDMA Development Group CS Coding Scheme CSD Circuit Switched Data CPU Central Processing Unit D DAI Digital Audio interface DAC Digital-to-Analog Converter DCE Data Communication Equipment DSP Digital Signal Processor DTE Data Terminal Equipment DTMF Dual Tone Multi-Frequency DTR Data Terminal Ready E EFR Enhanced Full Rate
MG2636 module 10EGSM Enhanced GSM EMC Electromagnetic Compatibility EMI Electro Magnetic Interference ESD Electronic Static Discharge ETS European Telecommunication Standard F FDMA Frequency Division Multiple Access FR Full Rate G GPRS General Packet Radio Service GSM Global Standard for Mobile Communications H HR Half Rate HSDPA High Speed Downlink Packet Access I IC Integrated Circuit IMEI International Mobile Equipment Identity ISO International Standards Organization ITU International Telecommunications Union L LCD Liquid Crystal Display LED Light Emitting Diode M MCU Machine Control Unit MMI Man Machine Interface MS Mobile Station P PCB Printed Circuit Board PCL Power Control Level PCS Personal Communication System PDU Protocol Data Unit PLL Phase Locked Loop PPP Point-to-point protocol R RAM Random Access Memory RF Radio Frequency
MG2636 module 11ROM Read-only Memory RMS Root Mean Square RTC Real Time Clock S SIM Subscriber Identification Module SMS Short Message Service SRAM Static Random Access Memory T TA Terminal adapter TDMA Time Division Multiple Access TE Terminal Equipment also referred it as DTE U UART Universal asynchronous receiver-transmitter UIM User Identifier Management UMTS Universal Mobile Telecommunications System USB Universal Serial Bus V VSWR Voltage Standing Wave Ratio W WCDMA Wide band Code Division Multiple Access Z ZTE ZTE Corporation
MG2636 module 12 2 Product Introduction Please refer to Figure 2-1 for the function block diagram of MG2636. Figure 2-1 MG2636 Function Block Diagram MG2636 module is GSM/GPRS wireless module, MG2636 module adopts a 36PIN stamp hole, which is applicable for GSM network. It supports 850/900/1800/1900 frequency band.
MG2636 module 133 PIN Definitions MG2636 module adopts a 40PIN stamp hole and the distance between PINs is 0.5mm. Refer to table 3-1 below for PIN definitions. Refer to table 3-2 for the key voltage of each pin. Table 3-1 PIN definitions 1 VREG_USIM UIM MG2636MD_A GND 362 SIM_RST GND 353 SIM_CLK LED SIG_LED 344 SIM_DATA PCM PCM_DIN 335 GND PCM_CLK 326 EAR2_P AUDIO USB USB_DM 317 EAR1_P USB_DP 308 EAR1_N ON/OFF 299 MIC2_P UART PCM_SYNC(/DSR) 2810 MIC1_P PCM_DOUT(DCD) 2711 MIC1_N /DTR 2612 GND /RTS 2513 /PON_RESET RI 2414 VBUS POWER TXD 2315 VCHG RXD 2216 V_MAIN /CTS 2117 V_MSME_1V8 GND 2018 V_MAIN ANT RF_ANT 19 Refer to table 3-1 below for PIN definitions of MG2636 module. Table 3-2 PIN definitions Function Pin No. Signal name I/O Basic functions Remarks SIM card interface 1 VREG_USIM O 2.85V/1.8V 2 SIM_RST O USIM card reset signal 3 SIM_CLK O USIM card clock 4 SIM_DATA I/O USIM card data cable Audio 6 EAR2_P O Single-end audio output channel 2 7 EAR1_P O Differential audio output channel 1, anode 8 EAR1_N O Differential audio output channel 1, cathode 9 MIC2_P I Single-end audio input channel 2
MG2636 module 1410 MIC1_P I Differential audio input channel 1, anode 11 MIC1_N I Differential audio input channel 1, cathode Reset 13 /PON_RESET I Reset signal Low level valid Power 14 VBUS I USB power +5V 15 VCHG I Charge power 16 V_MAIN I Module’s main power 3.3V-4.2V 17 V_MSME_1V8 O Digital power Voltage output, 1.8V 18 V_MAIN I Module’s main power 3.3V-4.2V 29 ON/OFF I Power on/off control 1.8V, Low level valid UART 21 /CTS I Clear to send 1.8V, Low level valid 22 RXD I Receive data 1.8V 23 TXD O Transmit data 1.8V 24 RI O Ring tone 1.8V 25 RTS O Request to send 1.8V, Low level valid 26 /DTR I Data terminal ready 1.8V, Low level valid PCM 27 PCM_DOUT（DCD） O PCM data output 1.8V, duplex with DCD 28 PCM_SYNC （/DSR） O PCM frame SYNC clock 1.8V, duplex with /DSR 32 PCM_CLK O PCM data clock 1.8V 33 PCM_DIN I PCM data input 1.8V USB interface 30 USB_DP I/O USB data+ 31 USB_DM I/O USB data- LED 34 SIG_LED O Module’s working status LED Antenna 19 RF_ANT I/O Antenna interface GND 5、12、20、35、36 GND
MG2636 module 154 Decription of Hardware Interfaces 4.1 Summary This chapter introduces each logic function interfaces of MG2636 module & its operation descriptions, and provides the designing sample.  Power and Reset Interface  COM Port  SIM Card Interface  Audio Interface  PCM interface  USB2.0 interface  Antenna Interface Remarks: In the system, the module layout should be far away from high-speed circuit, switch power, power transformer, large power inductor, or single chip microcomputer’s clock circuit. 4.2 Power and Reset 4.2.1 Power Design The module could work under two power modes: 1. Power adaptor; 2. Battery The power could directly be supplied externally, the external power is added directly to V_MAIN and meets the voltage requirements in table 4-1. The external power could be supplied by the power adaptor with constant output, battery, USB power converter, etc. It’s recommended to design 2A current to meet the requirements of GSM/GPRS. Table 4-1 Voltage characteristics Classification MIN. Typical Max. Input voltage 3.3 V 3.8 V 4.25 V  Power on The module will be turned off after power-on normally. To turn on the module, provide a 2000-2500mS low level pulse to ON/OFF PIN.  Power off To turn off the module, provide a 2500-4000mS low level pulse to ON/OFF PIN.  Reset To reset the module, provide a 2500-4000mS low level pulse to ON/OFF PIN After reset, the module will be turned off. To turn on the module, provide a 2000-2500mS low level pulse to ON/OFF PIN.  V_MSME_1V8
MG2636 module 16There is a voltage output pin with current adjuster on MG2636 module, which can be used to supply external power to the board. The voltage of this pin and the voltage of baseband processor/memory come from the same voltage adjuster. The voltage output is available only when the module is on. The normal output voltage is 1.8V, and the user should absorb the current from this pin as little as possible (less than 10mA). Generally, it is recommended to use this pin for pull-up when matching the level.  Other Advice In order to make sure the data is saved safely, please don’t cut off the power when the module is on. It’s strongly recommended to use ON/OFF pin or AT command to turn off the mobile phone. 4.3 COM Port The module provides a full duplex UART interface, whose maximal data rate is 230.4kbps and typical data rate is 11.5kbps. External interface is 1.8VCMOS level signal, which could be used for upgrade, port communication, etc. When using MG2636 module’s UART port to communicate with PC or MCU, please pay attention to the direction of TX, RX. It’s specially noted that MG2636 module’s UART port only supports 1.8V, therefore for non 1.8V external UART, it needs to convert the level. Normally a dynatron is used to realize the level conversion. As shown in figure 4-1, the resistance is just for your information, please calculate again during the design.
MG2636 module 17Figure 4-1 UART Interface Reference Design Diagram 4.4 SIM Card Interface The module supports 2.85V/1.8V SIM card, and it’s strongly recommended to add ESD component to protect UIM card as shown in figure 4-2.
MG2636 module 18Figure 4-2 SIM Card Circuit Reference Design Diagram Note: The clock data rate of UIM card circuit is 4M, and the card socket should be laid closely around the module and the wiring should be as short and thick as possible. 4.5 Audio Interface The module provides 2 speaker interfaces and 2 microphone interfaces. Only one pair I/O works at the same time.  Microphone The two microphone interfaces MIC_N and MIC_P are differential interface, which could also be used for single end input. It’s recommended to use differential mode to reduce the noises and it is directly connected with the receiver. MIC_P is single ended interface, which could be directly connected to the microphone since the offset voltage is internally provided.  Earpiece The earpiece interface EAR1_P and EAR1_N are both differential interfaces with 32Ω resistance; EAR2_P is single-ended interface with 32Ω resistance and no coupling of capacitor is required.  Design of audio interface on the receiver Select the microphone with the sensitivity lower than -52dB since EAR1’s output power is 35mW and the max. gain inside MIC1 reaches 52dB. Note: if other kind of audio input method is adopted, the input signal should be within 1V. If the signal voltage is lower than 1V, then the pre-amplifier should be added. If the signal voltage is higher than 1V, then network attenuation should be added  Design of audio interface on the earpiece Select the microphone with the sensitivity lower than -52dB since EAR2’s output power is 10.8mW and the max. gain inside MIC2 reaches 52dB. The level of MIC2_P PIN is about 1.8V. The receiver’s design is just the same as the receiver’s.
MG2636 module 194.6 PCM Interface The module’s PCM interface provides PCM_CLK, PCM_SYNC, PCM_DIN, PCM_DOUT，and it supports 2.048MHz PCM clock data rate and 8K frame data rate. PCM clock will stop the output when it enters the dormant mode. The module’s PCM interface must work under Master mode, and the clock and SYNC signal must be sent by the module. The device connected with the interface can word under Slave mode only. See the time sequence of PCM interface in figure 4-3. Figure 4-3 Time Sequence of PCM Interface
MG2636 module 20 4.7 USB2.0 Interface The module provides USB2.0 HS interface with 480Mbps, which is composed of VBUS, D+ and D-. You can directly connect USB signal interface when designing the module’s external circuit, but try to add ESD protector during the design to avoid damaging the module. D1 is USB2.0 ESD protector in the figure, and the Junction capacitance is small than 3P. VBUS is connected to the external host VBUS. The USB operating voltage is: 4.75—5.25V with the typical value of 5V. See figure 4-4. Figure 4-4 USB Interface Circuit Reference Design Diagram
MG2636 module 21 5 Mechanical Design 5.1 Appearance Diagram See the appearance of MG2636 module in figure 5-1. Figure 5-1 MG2636 Module’s Appearance  Dimensions:（LxWxH）：35 mm x 32.5mm x2.65mm  Weight: 7g
MG2636 module 225.2 Module Assembly Diagram See the assembly diagram of MG2636 module in figure 5-2. Figure 5-2 Module’s Assembly Diagram 5.3 Module’s Fixing Method The module’s fastening method adopts direct manual soldering to avoid second-time soldering. It’s strongly recommend to use the manual soldering because MG2636 module board is just 0.8mm thick and MT6223BGA space is too small.
MG2636 module 236. Antenna Interface The RF interface of the MG2636 Module has an impedance of 50 . The module is capable of sustaining a total mismatch at the antenna connector or pad without any damage, even when transmitting at maximum RF power. The external antenna must be matched properly to achieve best performance regarding radiated power, DC-power consumption, modulation accuracy and harmonic suppression. Antenna matching networks are not included on the MG2636 Module PCB and should be placed in the host application. Regarding the return loss, the Module provides the following values in the active band: Table 6-1 Return Loss in the Active Band State of Module Return Loss of Module Recommended Return Loss of Application Receive ≥ 8dB ≥ 12dBTransmit not applicable ≥ 12dBThe connection of the antenna or other equipment must be de coupled from DC voltage. This is necessary because the antenna connector is DC coupled to ground via an inductor for ESD protection. 6.1 Antenna Installation To suit the physical design of individual applications, the MC2261 offers two alternative approached to connecting the antenna: ■ Recommended approach: MM9329-2700B antenna connector manufactured by MURATA assembled on the component side of the PCB (top view on Module). See Section 4.3 for details. ■ Antenna pad and grounding plane placed on the bottom side. See Section 4.2 for details. The MM9329-2700B connector has been chosen as antenna reference point (ARP) for the ZTEMT reference equipment submitted to type approve the MG2636 Module. All RF data specified throughout this manual are related to the ARP. For compliance with the test results of the ZTEMT type approval you are advised to give priority to the connector, rather than using the antenna pad. Note: Both solutions can be applied alternatively. This means,if the antenna is connected to the pad, then the connector on the Module must be left empty,and when the antenna is connected to the Module connector, the pad is useless, 6.2 Antenna Pad The antenna pad of the module is soldered to the board on the customer design to connect with RF line. For proper grounding connect the RF line to the ground plane on the bottom of the MG2636 Module which must be connected to the ground plane of the application. Consider that according to GSM recommendations as 50Ω connector is mandatory for type approval measurements. It must be ensured that the RF line which is connected to antenna pad should be controlled on 50Ω. Notes on soldering ■ To prevent damage to the Module and to obtain long-term solder joint properties, you are advised to maintain the standards of good engineering practice for soldering.
MG2636 module 24Material Properties ■ MG2636 Module PCB: FR4 ■ Antenna pad: Gold plated pad 6.3 Antenna connector The MG2636 Module uses a microwave coaxial connector supplied by Murata Ltd. The product name is MM9329-2700B. The position of the antenna connector on the Module PCB can be seen in Figure 6-3. Figure 6-3 Specification of MM9329-2700B connector Table 6-2 Product specifications of MM9329-2700B connector Part Number Rated Voltag e (V) Contact Resistan ce (ohm) Withstandi ng Voltage (rms) Insulation Resistance (M ohm)Durability (cycles)Frequency Rating (GHz)Temperature Range (degree C)VSWR Center Conta ct Outer Conta ct InsulatorMM9329 -2700B 250 0.015 max. 300 (AC) 500 min. 100 DC - 6.0 -40~+90. 1.2 max. (DC~3GH z) Copper Alloy Gold plated Copper Alloy Silver plated Engineering plastic 6.4 Antenna Subsystem The antenna sub-system and its design is a major part of the final product integration. Special attention and care should be taken in adhering to the following guidelines. 6.4.1 Antenna Specifications Choice of the antenna cable (type, length, performance, RF loss, etc) and antenna connector (type + losses) can have a major impact on the success of the design. 6.4.2 Cable Loss All cables have RF losses. Minimizing the length of the cable between the antenna and the RF connectors on
MG2636 module 25the module will help obtain superior performance. High Quality/Low loss co-axial cables should be used to connect the antenna to the RF connectors. Contact the antenna vendor for the specific type of cable that interfaces with their antenna and ask them to detail the RF losses of the cables supplied along with the antenna. Typically, the cable length should be such that they have no more than 1-2dB of loss. Though the system will work with longer (lossy) cables, this will degrade GSM system performance. Care should also be taken to ensure that the cable end connectors/terminations are well assembled to minimize losses and to offer a reliable, sturdy connection to the Module sub-system. This is particularly important for applications where the module is mounted on a mobile or portable environment where it is subject to shock and vibration. 6.4.3 Antenna Gain Maximum Requirements Our FCC Grant imposes a maximum gain for the antenna subsystem: 2 dBi for the GSM850 band and 2dBi for the 1900 band. Warning: Excessive gain could damage sensitive RF circuits and void the warranty. 6.4.4 Antenna Matching The module’s RF connectors are designed to work with a 50-ohm subsystem. It is assumed that the antenna chosen has matching internal to it to match between the 50-ohm RF connectors and the antenna impedance. 6.4.5 PCB Design Considerations • The antenna subsystem should be treated like any other RF system or component. It should be isolated as much as possible from any noise generating circuitry including the interface signals via filtering and shielding. • As a general recommendation all components or chips operating at high frequencies such as micro controllers, memory, DC/DC converts and other RF components should not be placed too close to the module. When such cases exist, correct supply and ground de-coupling areas should be designed and validated. • Avoid placing the components around the RF connection and close to the RF line between the RF antenna and the module. • RF lines and cables should be as short as possible. • If using coaxial cable it should not be placed close to devices operating at low frequencies. Signals like charger circuits may require some EMI/RFI decoupling such as filter capacitors or ferrite beads. • Adding external impedance matching to improve the match to your cable and antenna assemblies is optional. Please contact the antenna vendor for matching requirements. • For better ESD protection one can implement a shock coil to ground and place it close to the RF connector. Antenna Interface Proper measures should be taken to reduce the access loss of effective bands, and good shielding should be established between the external antenna and the RF connector. Besides, the external RF cables should be kept far away from all interference sources such as high-speed digital signal or switch power supply. According to mobile station standard, stationary wave ratio of antenna should be between1.1 to 1.5, and input impedance is 50 ohm. Different environments may have different requirements on the antenna’s gain. Generally, the larger gain in the band and smaller outside the band, the better performance the antenna has. Isolation degree among ports must more than 30dB when multi-ports antenna is used. For example, between two different polarized ports on dual-polarized antenna, two different frequency ports on dual-frequency antenna, or among four ports on dual-polarized dual-frequency antenna, isolation degree should be more than 30dB.
MG2636 module 26Important compliance information for North American users The MG2636 Module has been granted modular approval for mobile applications. Integrators may use the MG2636 Module in their final products without additional FCC certification if they meet the following conditions. Otherwise, additional FCC approvals must be obtained. 1. At least 20cm separation distance between the antenna and the user’s body must be maintained at all times. 2. To comply with FCC regulations limiting both maximum RF output power and human exposure to RF radiation, the maximum antenna gain including cable loss in a mobile-only exposure condition must not exceed 2dBi in the cellular band and 2dBi in the PCS band. 3. The MG2636 Module and its antenna must not be co-located or operating in conjunction with any other transmitter or antenna within a host device. 4. A label must be affixed to the outside of the end product into which the MG2636 Module is incorporated, with a statement similar to the following: For MG2636: This device contains FCC ID: Q78-MG2636. 5. A user manual with the end product must clearly indicate the operating requirements and conditions that must be observed to ensure compliance with current FCC RF exposure guidelines. The end product with an embedded MG2636 Module may also need to pass the FCC Part 15 unintentional emission testing requirements and be properly authorized per FCC Part 15. Note: If this module is intended for use in a portable device, you are responsible for separate approval to satisfy the SAR requirements of FCC Part 2.1093.

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