User's Manual

CE910-DUAL Hardware User Guide
1vv0301010 Rev .0 – 2012-07-10
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved. Page 32 of 63
6. Antenna
The antenna connection and board layout design are the most important parts in the full
product design and they strongly reflect on the product’s overall performance. Read carefully
and follow the requirements and the guidelines for a proper design.
6.1. CDMA Antenna Requirements
The antenna for a Telit CE910-DUAL device must fulfill the following requirements:
CDMA Antenna Requirements
Frequency range
Depending on the frequency band(s) provided by the
network operator, the customer must use the most suitable
antenna for that/those band(s)
Bandwidth
70 MHz in CDMA BC0
140 MHz in CDMA BC1
Gain
Gain < 5.12dBi in CDMA BC0
Gain < 6.12dBi in CDMA BC1
Impedance
50 Ohm
Input power
> 24.5dBm Average Power in CDMA
VSWR absolute max
≤ 5:1 (Limit to avoid permanent damage)
VSWR recommended
≤ 2:1 (Limit to fulfill all regulatory requirement)
When using the Telit CE910-DUAL, since there’s no antenna connector on the module, the
antenna must be connected to the CE910-DUAL antenna pad (K1) by means of a transmission
line implemented in the PCB.
In the case that the antenna is not directly connected at the antenna pad of the CE910-DUAL,
then a PCB line is required.