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 55 of 89
Here is the guidance for GPS antenna path.
Layer1, Top layer:
The ball in blue circle is S1 which is assigned to the GPS_ANT
in the HE863 Family. It is the starting point from the HE863
Family to an Antenna connector in a host system.
The trace info as; Thickness = 0.035 mm
Width = 1.0 mm
Length = 1.025 mm
Clearance = 0.775 mm (Signal to GND)
The actual trace limits in a host system should be calculated
to correspond to 50ohm and it may be provided by the pcb maker.
Layer2, inner layer:
It needs a cut-out on layer2 to meet 50ohm.