User's Manual

Cinterion
®
PLS8-X/PLS8-V Hardware Interface Overview
5 Antenna Interfaces
30
 PLS8-X_PLS8-V_HIO_v03.009 2015-08-04
Confidential / Preliminary
Page 27 of 40
5 Antenna Interfaces
5.1 GSM/UMTS/LTE Antenna Interface
The PLS8-X/PLS8-V GSM/UMTS/LTE antenna interface comprises a GSM/UMTS/LTE main
antenna as well as a UMTS/LTE Rx diversity/MIMO antenna to improve signal reliability and
quality
1
. The interface has an impedance of 50. PLS8-X/PLS8-V is capable of sustaining a
total mismatch at the antenna interface without any damage, even when transmitting at maxi-
mum RF power.
The external antennas must be matched properly to achieve best performance regarding radi-
ated power, modulation accuracy and harmonic suppression. Matching networks are not in-
cluded on the PLS8-X/PLS8-V PCB and should be placed in the host application, if the antenna
does not have an impedance of 50
.
Regarding the return loss PLS8-X/PLS8-V provides the following values in the active band:
1.
By delivery default the UMTS/LTE Rx diversity/MIMO antenna is configured as available for the module
since its usage is mandatory for LTE. Please refer to [1] for details on how to configure antenna settings.
Table 8: Return loss in the active band
State of module Return loss of module Recommended return loss of application
Receive >
8dB > 12dB
Transmit not applicable >
12dB
Idle <
5dB not applicable