Telit Wireless Solutions GE864 GSM Antenna PCB line Guidelines, Antenna Line on PCB Requirements

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GE864 Hardware User Guide

1vv0300694 Rev.10 - 10/06/08

This line of transmission shall fulfill the following requirements:

ANTENNA LINE ON PCB REQUIREMENTS

Impedance

50 ohm

Max Attenuation

0,3 dB

No coupling with other signals allowed

Cold End (Ground Plane) of antenna shall be equipotential to the GE864-QUAD / PY ground pins

Furthermore if the device is developed for the US market and/or Canada market, it shall comply to the FCC and/or IC approval requirements:

This device is to be used only for mobile and fixed application. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. End-Users must be provided with transmitter operation conditions for satisfying RF exposure compliance. OEM integrators must ensure that the end user has no manual instructions to remove or install the GE864-QUAD / PY module. Antennas used for this OEM module must not exceed 3dBi gain for mobile and fixed operating configurations.

6.2 GSM Antenna – PCB line Guidelines

•Ensure that the antenna line impedance is 50 ohm;

•Keep the antenna line on the PCB as short as possible, since the antenna line loss shall be less than 0,3 dB;

•Antenna line must have uniform characteristics, constant cross section, avoid meanders and abrupt curves;

•Keep, if possible, one layer of the PCB used only for the Ground plane;

•Surround (on the sides, over and under) the antenna line on PCB with Ground, avoid having other signal tracks facing directly the antenna line track;

•The ground around the antenna line on PCB has to be strictly connected to the Ground Plane by placing vias once per 2mm at least;

•Place EM noisy devices as far as possible from GE864-QUAD / PY antenna line;

•Keep the antenna line far away from the GE864-QUAD / PY power supply lines;

•If you have EM noisy devices around the PCB hosting the GE864-QUAD / PY, such as fast switching ICs, take care of the shielding of the antenna line by burying it inside the layers of PCB and surround it with Ground planes, or shield it with a metal frame cover.

•If you don’t have EM noisy devices around the PCB of GE864-QUAD / PY, by using a strip-line on the superficial copper layer for the antenna line, the line attenuation will be lower than a buried one;

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Contents GE864 Hardware User Guide This document is relating to the following products GE864 Hardware User GuideContents 10.2 10.110.3 10.4Packing system Safety RecommandationsDisclaimer GE864-QUAD / PY OverviewLength 30 mm Width Thickness GE864 Mechanical DimensionsPIN-OUT GE864 module connectionsGpio Reserved Vbatt TOP View BGA Balls LayoutReserved Turning on the GE864-QUAD / PY Hardware Commands10k Hardware Unconditional Restart Turning OFF the GE864-QUAD / PYHardware shutdown 10k Power Supply Requirements Power SupplyElectrical Design Guidelines General Design Rules1.2 + 12V input Source Power Supply Design Guidelines GE864 Hardware User Guide Battery Source Power Supply Design Guidelines Battery Charge control Circuitry Design Guidelines GE864 Hardware User Guide Thermal Design Guidelines Power Supply PCB layout Guidelines GSM Antenna Requirements AntennaAntenna Line on PCB Requirements GSM Antenna PCB line GuidelinesGSM Antenna Installation Guidelines Current characteristics Logic level specificationsAbsolute Maximum Ratings -Not Functional Operating Range Interface levels 2.8V CmosSignal Min Max Reset signalSignal Function Bga Ball Operating Range Interface levels 2.8V Cmos Level Min Max Serial PortsAbsolute Maximum Ratings -Not Functional ParameterMin Max Signals of the GE864 serial port are RS232 level translation GE864 Hardware User Guide 5V Uart level translation GE864 Hardware User Guide External Amplifier Audio Section OverviewShort description Input Lines MicrophoneMicmt 1st differential microphone path Input Lines CharacteristicsOutput Lines Speaker External SIM Holder Implementation Output Lines CharacteristicsOnoff General Purpose I/OPict01 Operating Range Interface levels 1.8V Cmos Level Min Max Gpio Logic levelsAbsolute Maximum Ratings -Not Functional Parameter Min Max Using a Gpio Pad as Output Using a Gpio Pad as InputUsing the Alarm Output GPIO6 Using the RF Transmission Control GPIO4Using the Rftxmon Output GPIO5 AT#SRP=3 Using the Buzzer Output GPIO7Magnetic Buzzer Concepts Working Current Influence Power Supply InfluenceFrequency Behaviour Allowed Gpio Using the Temperature Monitor FunctionLED status Device Status Indication of network service availabilityRTC Bypass out VAUX1 power outputDAC Converter DAC and ADC sectionDescription Min Max UnitsLow Pass Filter Example Command is AT#DAC=enable,valueEnabling DAC ADC Converter Using ADC Converter12.1General Module finishing & dimensionsMounting the GE864 on your Board Top View Recommended foot print for the application GE864Top View Suggested Inhibit AreaStencil Debug of the GE864 in productionMetal pad diameter B mm PCB pad designBall pitch mm Solder resist opening diameter a mm Finish Layer thickness µm Properties Solder pasteLead free Solder paste Sn/Ag/CuFollowing is the recommended solder reflow profile 12.1.8 GE864 Solder reflowPacking system 12.2.1 GE864 orientation on the tray Moisture sensibility Conformity Assessment Issues Safety Recommandations Revision Date Changes Document Change Log

GE864 specifications

The Telit Wireless Solutions GE864 is a compact yet robust cellular module designed for a wide range of M2M (Machine-to-Machine) applications. As part of the Telit family, the GE864 is particularly notable for its small form factor, reliability, and versatility, making it an ideal choice for various industries including automotive, healthcare, and utilities.

One of the standout features of the GE864 is its integrated GPRS capabilities, allowing devices to connect to cellular networks seamlessly. With a maximum data rate of 85.6 kbps for downlink and 42.8 kbps for uplink, this module facilitates efficient data transmission, suitable for applications that require real-time data monitoring and control.

The GE864 supports multiple frequency bands, ensuring global compatibility. It can operate on GSM/GPRS networks, enhancing its usability across different regions. This multi-band support allows developers to deploy their solutions in diverse markets without modifying the hardware, thus saving both time and resources.

Power management is another critical area where the GE864 shines. The module comes equipped with advanced power-saving features, allowing it to operate effectively in battery-powered applications. Notable features include sleep modes and intelligent power management protocols that help extend battery life while maintaining reliable connectivity.

In terms of physical specifications, the GE864 has a compact design, measuring only 29x38 mm, which is essential for integration into space-constrained environments. This makes it particularly well-suited for applications in remote monitoring, asset tracking, and utility metering.

The module supports a range of interfaces, including UART, USB, and I2C, providing developers with the flexibility to connect various peripheral devices and sensors. This versatility enables the creation of customized solutions tailored to specific application needs.

Furthermore, the GE864 is designed to meet rigorous quality and durability standards, making it suitable for use in harsh environments. Its resilience to extreme temperatures and vibrations ensures dependable performance in challenging conditions, which is often a requirement in industrial and automotive applications.

In summary, the Telit Wireless Solutions GE864 is a feature-rich cellular module that combines compact design with robust performance and versatility. Its advanced connectivity options, efficient power management, and reliable operation make it an invaluable asset for businesses looking to develop innovative M2M solutions. Whether it’s for smart cities, telematics, or healthcare applications, the GE864 is engineered to meet the demands of today's connected world.
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