Chapter 2 – The Antenna System
Multi-Tech Systems, Inc. SocketModem GSM Hardware Guide for Developers
13
Antenna
GSM Antenna Requirements/Specifications
Frequency Range:
824 – 960 MHz / 1710 – 1990 MHz
Impedance: 50
ohm
VSWR: <2.0:1
Typical Radiated Gain:
0 dBi on azimuth plane
Radiation: Omni
Polarization: Vertical
Wave: Half
Wave
Dipole
Antennas Available from Multi-Tech:
Quad Band Description
Qty
Part Number
Hinged Right Angle 800/900/1800/1900 MHz Cellular Modem Antenna 1
ANQB-1HRA
Hinged Right Angle 800/900/1800/1900 MHz Cellular Modem Antenna
10
ANQB-10HRA
Hinged Right Angle 800/900/1800/1900 MHz Cellular Modem Antenna
50
ANQB-50HRA
PTCRB Requirements Note:
There cannot be any alteration to the authorized antenna system. The antenna system must be
the same type with similar in-band and out-of-band radiation patterns and maintain the same
specifications.
FCC Requirements Note:
The antenna gain, including cable loss, must not exceed 3.1 dBi at 1900 MHz / 0.9 dBi at 850
MHz for mobile operating configurations and 7.1 dBi at 1900 MHz / 0.9 dBi at 850 MHz for fixed
mounted operations, as defined in 2.1091 and 1.1307 of the rules for satisfying RF exposure
compliance.
