User Manual

HE863 Family Hardware User Guide
1vv0300891 Rev.6
- 2011-04-14
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights
Reserved. Page 48 of 92
7.2. GSM/WCDMA Antenna – PCB line Guidelines
x Antenna line must have uniform characteristics, constant
cross section, avoid meanders and abrupt curves;
x Keep, if possible, one layer of the PCB used only for the
Ground plane;
x 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;
x 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;
x Place EM noisy devices as far as possible from HE863
Family antenna line;
x Keep the antenna line far away from the HE863 Family power
supply lines;
x 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.
x HE863 Family can only be used with a host antenna circuit
trace layout according to below guidelines and a host
system designer must follow the guidelines to keep the
original Grant of HE863 Family.
OEM, host system designer has to know that the strict
compliance to the layout reference design which Telit will
provide is required to ensure that only approved antenna
shall be used in the host system.
If in a host system there is any difference from the trace
layout already approved, OEM host system designer has to
know that it requires a Class II permissive change or a
new grant as appropriate as FCC defines.
Compliance of this device in all final host configurations
is the responsibility of the Grantee.
Here is the information of Telit’s approved interface
board layout and please see carefully the pictures
extracted from the gerber files for respective layer as
attached below.
This guidance should be referenced by OEM host.
Telit EVK for HE863 Family has a structure of six pcb
layers.