User's Manual

Telit GE863-GPS
Hardware User guide
1vv0300714, Rev. ISSUE#0, - 21/02/06
Reproduction forbidden without Telit Communication written authorization – All Right reserved – Right of modification reserved page 22 of 76
As suggested on the Product Description the external active antenna for a Telit GE863-GPS
device shall fulfil the following requirements:
ANTENNA REQUIREMENTS
Frequency range
1575.42 MHz (GPS L1)
Bandwidth
+- 1.023 MHz
Gain
1.5 dBi < Gain < 4.5 dBi
Impedance
50 ohm
Amplification
Typical 25dB (max 27dB)
Supply voltage
3 to 5 V DC
Current
consumption
Typical 10 to 30 mA (40 mA max)
When using the Telit GE863-GPS, since there's no antenna connector on the module, the antenna
must be connected to the GE863-GPS through the PCB with the antenna pad.
In the case that the antenna is not directly developed on the same PCB, hence directly connected
at the antenna pad of the GE863-GPS, then a PCB line is needed in order to connect with it or
with its connector.
This line of transmission shall fulfil the following requirements:
ANTENNA LINE ON PCB REQUIREMENTS
Impedance
50 ohm
No coupling with other signals allowed
Cold End (Ground Plane) of antenna shall be equipotential to
the GE863-GPS ground pins
Furthermore if the device is developed for the US market and/or Canada market, it shall comply
to the FCC and/or IC approval requirements:
This device is to be used only for mobile and fixed application.