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This transmission line shall fulfil the following requirements:

ANTENNA LINE ON PCB REQUIREMENTS

Characteristic Impedance

50 ohm

Max Attenuation

0,3 dB

Coupling with other signals shall be avoided

Cold End (Ground Plane) of antenna shall be equipotential to

the UE910 ground pins

Furthermore if the device is developed for the US market and/or Canada market, it shall

comply with the FCC and/or IC approval requirements:

This device is to be used only for mobile and fixed application. In order to re-use the Telit

FCC/IC approvals 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. If antenna is installed with a separation

distance of less than 20 cm from all persons or is co-located or operating in conjunction with

any other antenna or transmitter then additional FCC/IC testing may be required. End-Users

must be provided with transmitter operation conditions for satisfying RF exposure

compliance.

Antennas used for this OEM module must not exceed the gains for mobile and fixed

operating configurations as described in “FCC/IC Regulatory notices” chapter.

6.4 GSM/WCDMA - PCB line Guidelines

 Make sure that the transmission line’s characteristic impedance is 50ohm ;

 Keep line on the PCB as short as possible, since the antenna line loss shall be less than

around 0,3 dB;

 Line geometry should have uniform characteristics, constant cross section, avoid meanders

and abrupt curves;

 Any kind of suitable geometry / structure (Microstrip, Stripline, Coplanar, Grounded

Coplanar Waveguide...) can be used for implementing the printed transmission line afferent

the antenna;

 If a Ground plane is required in line geometry, that plane has to be continuous and

sufficiently extended, so the geometry can be as similar as possible to the related canonical

model;

 Keep, if possible, at least one layer of the PCB used only for the Ground plane; If possible,

use this layer as reference Ground plane for the transmission line;

 It is wise to surround (on both sides) the PCB transmission line with Ground, avoid having

other signal tracks facing directly the antenna line track.

 Avoid crossing any un-shielded transmission line footprint with other signal tracks on

different layers;

DRAFT

Telit Wireless Solutions UE910 series User Manual

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