Ref. :
P212515
Ind. :
A
12/18
© 2012 « Any reproduction of this document whether total or partial without the written consent of
ACTIA
Automotive
is
forbidden ».
V.2 ANTENNA INSTALLATION
Warning :
The GSM and WLAN antennas installation must provide a minimum separation distance of 20
cm from users and nearby persons.
All antennas shall be connected before powering the TGW2.
The antennas shall be placed as far as possible from other transmitters to limit disturbances from
other devices.
V.2.1 GPS and GSM antenna requirement
The GSM antenna shall meet the following requirement :
•
Antenna shall be compliante to GSM/UMTS frequencies :
GSM/UMTS bands
RX/TX mode
Frequency range
GSM 850
TX
824 - 849 MHz
RX
869 - 894 MHz
GSM 900
TX
880 - 915 MHz
RX
925 - 960 MHz
DCS 1800
TX
1710 - 1785 MHz
RX
1805 - 1880 MHz
PCS 1900
TX
1850 - 1910 MHz
RX
1930 - 1990 MHz
WCDMA B5 850
TX
824 - 849 MHz
RX
869 - 894 MHz
WCDMA B2 1900
TX
1850-1910 MHz
RX
1930-1990 MHz
WCDMA B1 2100
TX
1920-1980 MHz
RX
2110 - 2170 MHz
•
Antenna impedance : 50
Ω
•
DC resistance needed for antenna detection : 50k
Ω
+-20%
•
Antenna VSWR < 2.5:1 in free space for all bands
•
Free space antenna efficiency should be greater than -7 dB (20%).
•
Combined cable loss and antenna gain:
o
900 MHz GSM band : The combined cable loss and antenna gain must not exceed
+2.65 dBi
o
1800 MHz DCS band : The combined cable loss and antenna gain must not exceed
+7.75 dBi
o
UMTS 2100 MHz band : The combined cable loss and antenna gain must not exceed
+7.75 dBi
o
850 MHz cellular band (WCDMA & GSM): The combined cable loss and antenna gain
must not 4.30 dBi
o
1900 MHz PCS band (WCDMA & GSM): The combined cable loss and antenna gain
must not 2.5 dBi
The GPS antenna shall meet the following requirement :
-
Must be compliant to GPS L1 band 1575MHz
-
power supply input range : 3.3V +-10%
-
Antenna impedance : 50
Ω
-
Current consumption : between 7 and 30mA (minimum current required for antenna detection)
Prefered antenna to be use for 2G and 3G TGW2 product variants : Volvo GPS/GSM antenna
reference 21398849.
