User's Manual

UE910 V2 Hardware User Guide
1VV0301065 Rev.1 – 2013-12-12
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved. Page 33 of 67
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. GSM/WCDMA Antenna Requirements
The antenna for a Telit UE910 V2 device must fulfill the following requirements:
When using the Telit UE910 V2, since there’s no antenna connector on the module, the antenna must
be connected to the UE910 V2 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 UE910 V2, then a PCB
line is required. This transmission line shall fulfill the following requirements:
Antenna Line on PCB Requirements
Characteristic Impedance
50Ohm
Max Attenuation
0.3dB
Coupling with other signals shall be avoided
Cold End (Ground Plane) of antenna shall be equipotential to the UE910 V2 ground pads
GSM / WCDMA 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
UE910-EU V2
UE910-NA V2
EGSM900 : 80 MHz
GSM1800(DCS) : 170 MHz
WCDMA FDD-I(2100) : 250 MHz
WCDMA FDD-VIII(900) : 80 MHz
GSM850 : 70 MHz
GSM1900(PCS) : 140 MHz
WCDMA FDD-II(1900) : 140 MHz
WCDMA FDD-V(850) : 70 MHz
Gain
Gain < 3dBi
Impedance
50 Ohm
Input power
> 33dBm(2 W) peak power in GSM
> 23.5dBm Average power in WCDMA
VSWR
absolute max
<= 5:1(limit to avoid permanent damage)
VSWR
recommended
<= 2:1(limit to fulfill all regulatory requirements)