Sony Ericsson GR64 사용자 설명서
LZT 123 1834
74
6 Antenna Connector
The wireless modem’s antenna connector allows transmission of the radio frequency
(RF) signals from the wireless modem to an external customer supplied antenna. The
connector is a micro-miniature coaxial MMCX through hole mounted socket.
(RF) signals from the wireless modem to an external customer supplied antenna. The
connector is a micro-miniature coaxial MMCX through hole mounted socket.
A number of suitable MMCX type, mating plugs are available from the following
manufacturers:
manufacturers:
•
Amphenol
•
Suhner
•
IMS Connector Systems
The nominal impedance of the antenna interface is 50 ohms.
Feature
GSM850
E-GSM900
GSM1800
GSM1900
Frequency range (MHz)
824-894 880-960 1710-1880
1850-1990
Maximum power
33dBm (2W) 33dBm (2W) 30dBm (1W) 30dBm (1W)
Antenna Connector impedance
50 ohms
Antenna VSWR
2.5:1 max
To bypass the MMCX connector, a pair of PCB landing pads are
available on the underside of the module. You can probe these pads or
solder a coaxial cable directly to them. Sony Ericsson; however, cannot
guarantee absolute performance when connecting to the antenna in
this way due to the attenuation such a connection could potentially
cause. When connecting in this way, proceed with care.
available on the underside of the module. You can probe these pads or
solder a coaxial cable directly to them. Sony Ericsson; however, cannot
guarantee absolute performance when connecting to the antenna in
this way due to the attenuation such a connection could potentially
cause. When connecting in this way, proceed with care.
5.20-4 RF Antenna Pad Dimensions
NOTE