User's Manual

GC864 Hardware User Guide
1vv0300733 Rev. 0 - 12/06/06
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 17 of 68
4 Antenna
The antenna connection and board layout design are the most important part in the full product design
and they strongly reflect on the product overall performances, hence read carefully and follow the
requirements and the guidelines for a proper design.
4.1 Antenna Requirements
As suggested on the Product Description the antenna for a Telit GC864 device shall fulfill the following
requirements:
ANTENNA REQUIREMENTS
Frequency range
Standard Dual Band GSM/DCS frequency
range or
Standard Tri Band GSM/DCS/PCS
frequency range if used for all three bands
Bandwidth
136 MHz in GSM 850 and 900 & 170 MHz in
DCS & 140 MHz PCS band
Gain
Gain < 3dBi
Impedance
50 ohm
Input power
> 2 W peak power
VSWR absolute
max
<= 10:1
VSWR
recommended
<= 2:1
4.2 GC864 Antenna Connector
The GC864 module is equipped with a 50 Ohm RF connector from Murata,
GSC type P/N MM9329-2700B.
The counterpart suitable is Murata MXTK92 Type or MXTK88 Type.
Moreover, the GC864 has the antenna pads on the backside of the PCB. This allows the manual
soldering of the coaxial cable directly on the back side of the PCB. However, the soldering is not an
advisable solution for a reliable connection of the antenna.