HE910 Hardware User Guide
1VV0300925 Rev. 32
Page
52
of
111
2019-11-25
GSM/WCDMA Antenna Requirements
The antenna connection and board layout design are the most important aspect in the full
product design as they strongly affect the product overall performances, hence read
carefully and follow the requirements and the guidelines for a proper design.
The antenna and antenna transmission line on PCB for a Telit HE910 device shall fulfil the
following requirements:
ANTENNA REQUIREMENTS
Frequency range
Depending by frequency band(s) provided
by the network operator, the customer
shall use the most suitable antenna for
that/those band(s)
Bandwidth (GSM/EDGE)
70 MHz in GSM850, 80 MHz in GSM900,
170 MHz in DCS & 140 MHz PCS band
Bandwidth
(WCDMA)
70 MHz in WCDMA Band V
80 MHz in WCDMA Band VIII
460 MHz in WCDMA Band IV
140 MHz in WCDMA Band II
250 MHz in WCDMA Band I
Impedance
50 ohm
Input power
> 33dBm(2 W) peak power in GSM
> 24dBm Average power in WCDMA
VSWR absolute max
≤ 10:1 (limit to avoid permanent damage)
VSWR recommended
≤ 2:1 (limit to fulfil all regulatory
requirements)
When using the HE910, since there's no antenna connector on the module, the antenna
must be connected to the HE910 antenna pad (K1) by means of a transmission line
implemented on the PCB.
In the case the antenna is not directly connected at the antenna pad of the HE910, then a
PCB line is needed in order to connect with it or with its connector.
Summary of Contents for HE910
Page 1: ... 01 2017 Mod 0805 2017 01 Rev 6 HE910 HW User Guide 1VV0300925 Rev 32 2019 11 25 ...
Page 40: ...HE910 Hardware User Guide 1VV0300925 Rev 32 Page 40 of 111 2019 11 25 ...
Page 71: ...HE910 Hardware User Guide 1VV0300925 Rev 32 Page 71 of 111 2019 11 25 ...
Page 111: ... 01 2017 Mod 0805 2017 01 Rev 6 ...
