User's Manual

ARES/ATHENA
Solutions for a Real Time World User Manual
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Copyright Unigen Corporation, 2009
Antenna Interconnect & Impedance
Unigen has pre-qualified antennas that integrate the connectors, transmission line and the antenna.
UGWSX933SM0033U requires the use of a ½ wavelength dipole, 902-928MHz frequency range, with
a VSWR no greater than 2.0 and having a maximum output no greater than +2dBi The transmission
line must be designed to be 50-Ohm impedance.
Physical Implementation
The physical implementation of the RF transmission line must conform to the following
guidelines:
• Coaxial Cable: A coaxial of varying length may be used providing the impedance
measures 50 +/- 2 ohms and is non-radiating. Best practice RF engineering suggests
the cable should be kept to the minimum length required to satisfy the application.
Excessive cable and interconnect loss may adversely effect the effective transmission
and reception range of the end product.