User's Manual

GE865 Hardware User Guide

1vv0300799 Rev.11 – 13-07-2010

The ground surrounding the antenna line on PCB has to be strictly connected to the

main Ground Plane by means of via holes (once per 2mm at least), placed close to the

ground edges facing line track;

Place EM noisy devices as far as possible from GE865 antenna line;

Keep the antenna line far away from the GE865 power supply lines;

If EM noisy devices are present on the PCB hosting the GE865, 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 EM noisy devices are not present around the line, the use of geometries like

Microstrip or Grounded Coplanar Waveguide has to be preferred, since they typically

ensure less attenuation if compared to a Stripline having same length;

7.3 GSM Antenna - Installation Guidelines

Install the antenna in a place covered by the GSM signal.

If the device antenna is located greater then 20cm from the human body and there are

no co-located transmitter then the Telit FCC/IC approvals can be re-used by the end

product

If the device antenna is located less then 20cm from the human body or there are no

co-located transmitter then the additional FCC/IC testing may be required for the end

product (Telit FCC/IC approvals cannot be reused)

Antenna shall not be installed inside metal cases

Antenna shall be installed also according Antenna manufacturer instructions.