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 46 of 89
7. Antenna(s)
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 performances. Read carefully
and follow the requirements and the guidelines for a proper
design.
7.1. GSM/WCDMA Antenna Requirements
As suggested on the Product Description, the antenna for a
Telit HE863 Family device must fulfill the following
requirements:
When using the Telit HE863 Family, since there’s no antenna
connector on the module, the antenna must be connected to the
HE863 Family through the PCB with the antenna pad using a 50
Ohm transmission line.
In the case that the antenna is not directly developed on the
same PCB, hence directly connected at the antenna pad of the
HE863 Family, then a PCB line is needed in order to connect
with it or with its connector.
GSM / WCDMA Antenna Requirements
Frequency
range
Depending by frequency band(s) provided by the network
operator, the customer must use the most suitable
antenna for that/those band(s)
Bandwidth
HE863-EUD/EUR/EUG HE863-NAD/NAR/NAG HE863-AUD/AUG
70 MHz in GSM850,
80 MHz in GSM900,
170 MHz in DCS &
140 MHz in PCS
80 MHz in
WCDMA900, 250 MHz
in WCDMA2100
70 MHz in GSM850,
80 MHz in GSM900,
170 MHz in DCS &
140 MHz in PCS
70 MHZ in
WCDMA850, 140 MHz
in WCDMA1900
70 MHz in GSM850,
80 MHz in GSM900,
170 MHz in DCS &
140 MHz in PCS
70 MHz in
WCDMA850, 250 MHz
in WCDMA2100
Gain
Gain < 3dBi
Impedance
50 Ohm
Input power
> 33dBm(2 W) peak power in GSM
> 24dBm Average power in WCDMA
VSWR
absolute max
<= 10:1
VSWR
recommended
<= 2:1