Realistic TRC-422A - Base Station Antennas and Noise; Base Station Antenna Types

FRONT COWL MOUNT — The radiation pattern is slightly greater in the
direction of the rear fender opposite the side on which the antenna is
mounted. However, this position offers a number of advantages. The CB
antenna can be easily mounted. It can double as both the CB and the
standard auto radio antenna by employing a two-way coupler. Ask about
our Catalog Number 21-930 Front Cowl Mount antenna which is desi
for CB, AM and FM operation.
REAR DECK — The radiation pattern is strongest in the direction of the
» fron ‘fender opposite the side on which the antenna is mounted. In this
position you can use a full quarter-wave antenna or a shorter, loaded
whip. Here you might consider Radio Shack Catalog Number 21-926 or
21-908, or one of the full 102’’ (2.6m) whips.
BUMPER MOUNT — The antenna radiates in a pattern directly in front
of and to the rear of the vehicle, with maximum radiation directly away
from the vehicle, in a horizontal plane. Despite its fairly irregular pattern, oll
a bumper mounted full-length whip antenna will normally give the best —
results. Removing the antenna is simple and will leave no holes in the car.
We suggest you try our bumper-mount fiberglass whip, Catalog Number
21-927.
BASE STATION ANTENNAS
While your Transceiver is designed for Mobile operation, you might wish
to use it for a Base Station unit, in conjunction with a 120 volt AC/12 volt
DC Power Supply (available also from Radio Shack). In case you do use
your Transceiver in a Base station, here is a very brief discussion about
Base Station Antennas.
There are three basic types of base antennas (shown below).
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GROUND PLANE COAXIAL ANTENNA BEAM
BASE STATION ANTENNAS
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