User's Guide

HE863 Family Hardware User Guide
1vv0300891 Rev.5
- 2011-03-18
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights
Reserved. Page 47 of 89
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
t
o
the HE863 Family ground pins.
Furthermore if the device is developed for the US and/or
Canada market, it must 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 HE863 Family module. Antennas used for this OEM
module must not exceed 3dBi gain for mobile and fixed
operating configurations.
7.2. GSM/WCDMA Antenna – PCB line Guidelines
 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 via
holes once per 2mm at least;
 Place EM noisy devices as far as possible from HE863
Family antenna line;
 Keep the antenna line far away from the HE863 Family power
supply lines;
 If you have EM noisy devices around the PCB hosting the
HE863 Family, such as fast switching ICs, take care of
shielding it with a metal frame cover.