Huawei MG323 manual Antenna Interface, Antenna Installation

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HUAWEI MG323 GSM M2M Module
Hardware Guide	Antenna Interface

4 Antenna Interface

4.1 About This Chapter

An RF connector or an antenna pad can be used as the connection method of an antenna interface. When the MG323 module works properly, only one of the preceding connection methods is used. In addition, the antenna interface must be used with coaxial cables with 50 Ω characteristic impedance.

4.2 Antenna Installation

The MG323 module supports the following two antenna connection methods: buckled RF connector U.FL-R-SMT-1(80) manufactured by Hirose, and antenna pad. It is recommended that you use the buckled RF connector.

When the MG323 module works properly, only one antenna connection method can be used; otherwise, the RF performance may deteriorate.

If a buckled RF connector is used, it is recommended that you use a 50 Ω coaxial cable in the U.FL series. The height of the connector increases by 0.8 mm when this cable is used.

If an antenna pad is used, you need to connect the coaxial cable core to the pad. In addition, you need to connect the shield ground of the coaxial cable to the reference ground near the pad. You can choose a suitable direction to weld the RF cable to meet the installation requirements according to the actual application.

When trying to shorten the opening between the coaxial cable core and the shield ground, you also need to prevent a short circuit.

	Issue 06 (2013-06-13)	Huawei Proprietary and Confidential	29
		Copyright © Huawei Technologies Co., Ltd.

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Contents Hardware Guide Issue DateNo Warranty History About This DocumentVersion Date Chapter Descriptions CreationVersion Date Chapter Descriptions Specifications of the antenna interface Updated .8 Audio InterfaceUpdated -3 Recommended Contents Electrical and Reliability Features Overview IntroductionOverall Description Feature DescriptionAbout This Chapter Function OverviewDRX=5 DRX=9 DRX=2SMS Gprs Gprs ClassCircuit Block Diagram Application Block Diagram2Circuit block diagram of the MG323 module Description of the Application Interfaces B2B Connector InterfaceMin Tpy Max Pin Pin Name Description DC Characteristics NormalTermon ResetUART1DCD LedstatusOverview Power InterfaceVIO VbatVbat Interface Pin No Signal Name DescriptionGND Vcoin DCEVIO Interface Power-On and Power-Off Time SequenceVcoin Interface Pin for resetting the hardware Power-On Time SequencePin for controlling power-on and power-off Reset Signal Control InterfacePower-Off Time Sequence Pin for network status LED Input Signal Control PinsWorking or Network Status Output Signal Control PinApplication Device Uart Interface Pin No Signal Name Description Feature DirectionDCE receive DTE transmits DTE to DCE Data Serial data Circuit Recommended for the Uart InterfaceDCE data DTE is ready DTE to DCE Terminal ready DCE data set DCE is ready DCE to DTE ReadyPower supply of the SIM card Clock signal of the SIM cardData signal of the SIM card Reset signal of the SIM cardCircuit Recommended for the SIM Card Interface Ground signal of the SIM cardAudio Interface 12External circuit for 32 Ω handsets/16 Ω headsets13External circuit for the microphone interface Antenna Interface Antenna InstallationEnvironmental Type Material Condition Coaxial Cable and RF ConnectorHuawei MG323 GSM M2M Module Hardware Guide Antenna Interface Specification Minimum Typical Maximum Unit Value RF Specifications of the Antenna InterfaceESD Protection for the Antenna Interface Uplink frequency range GSM 824 849 MHzSpecification Minimum Typical Maximum Unit Value Polarization Linear polarization Pattern Omnidirectional Specifications of the Antenna InterfaceSymbol Specification Minimum Value Maximum Value Unit Electrical and Reliability FeaturesExternal power voltage Extreme Working ConditionsSpecification Minimum Value Maximum Value Unit Operating and Storage Temperatures and HumidityPin No Signal Name Electrical Criteria of Application InterfacesPower supply Function Signal Name Waveform Remarks LevelVoltage great drop. The Vbat power voltage Than 3.3Power pin Pins 41, 43, 45, 47, and 49 are power GND ExternalVBAT=0 LedstatuUART1DSR UART1RTS UART1DTR UART1CTS UART1DCD UART1 UART1RDUART1RIN Input Power Supply Power Supply FeaturesWorking Current Parameter Minimum Value Typical Value Maximum Value UnitBand Typical Unit Working Mode Typical value Unit RemarkConfiguration Configuration Value Reliability FeaturesUp/1 Down 123 Test Condition StandardTest Condition Standard EN61000-4-2 ±4 kV ±8 kV ESD FeaturesESD Test Standard Contact Discharge Air Discharge Dimensions L x W x H 35 mm x 32.5 mm x 3.05 mm Mechanical SpecificationsDimensions 1Dimensions of the MG323 module unit mm Dimensions of the B2B ConnectorModel Stacking HRS Number Height mm 5Structure fixing hole MG323 Module Installation Description6MG323 module installation 7Machine screw dimensions Specification Selection for Fasteners8Nut dimensions 1Circuits of typical interfaces in the MG323 module Appendix a Circuits of Typical InterfacesAcronym or Abbreviation Expansion Appendix B Acronyms and AbbreviationsPCB PbcchPDU RTC

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