Multi-Tech Systems 92U04A22740 ユーザーズマニュアル
Appendix B – Sources for Peripheral Devices
Multi-Tech Systems, Inc. SocketModem CDMA Developer’s Guide
19
Appendix B – Sources for Peripheral
Devices
CDMA Antenna
The integrated modem antenna connector is a MMCX connector. The MMCX connector incorporates a
'Snap On' latching action in order to make the connection easier with an excellent RF performance. An
additional advantage is its small physical size, which is 50% of the standard MCX connector.
'Snap On' latching action in order to make the connection easier with an excellent RF performance. An
additional advantage is its small physical size, which is 50% of the standard MCX connector.
This type of connector is suitable for the standard ranges of flexible and semi-rigid cables. The
characteristic impedance of the MMCX coaxial connector is 50 ohm. The antenna manufacturer must
guarantee that the antenna will be working according to the radio characteristics presented in the table
below.
characteristic impedance of the MMCX coaxial connector is 50 ohm. The antenna manufacturer must
guarantee that the antenna will be working according to the radio characteristics presented in the table
below.
Radio Characteristics
CDMA 850
CDMA 1900
Frequency RX
869 to 894 MHz
1930 to 1990 MHz
Frequency TX
824 to 849 MHz
1850 to 1910 MHz
Impedance
50 ohms
VSWR
<1.5
Typical
Radiated Gain
Radiated Gain
0 dBi in at least one direction
MMCX Plug
The SocketModem requires an MMCX plug to connect to an antenna.
MMCX Connector Example (right angle type)
Antenna
An antenna with matting connector can be ordered, for example, from:
IMS Connectors Systems GMBH
MMCX / SMA Adapter
A small MMCX / SMA adapter can be ordered, for example, from:
Amphenol
http://www.amphenol.com/
Order No: 908-31100
http://www.amphenol.com/
Order No: 908-31100