Use a high-gain bidirectional antenna, such as antenna AT-984A/G.
Fabricate and install a directional field-expedient antenna.
Install an omnidirectional ground-plane antenna, such as the RC-292
or OE-254.
If receiving a very weak signal, use a headset to cut out local
noise.
Raise the height of your antenna.
Figure 11.
Directivity of vehicle-mounted whip antenna.
NOTE:
A vehicle with a quarter-wave whip antenna mounted on its left
rear transmits its strongest signal in a line running from the
antenna through the right front of the vehicle (Fig 11 (A)).
Similarly, an antenna mounted on the right rear radiates its
strongest signal in a direction toward the left front (Fig 11
(B)).
10. ANTENNA SITING.
The most obvious fundamental of radio communication
is that a radio and its antenna must be situated in a position that ensures
communications with all the other stations in the net. The transmitter and
receiver will have greater range if the antenna is located in a high
position that is clear of hills, buildings, cliffs, densely wooded areas,
and other obstructions. Dips, depressions, valleys, and low places are poor
radio locations, because the surrounding high terrain tends to absorb the
radio frequency energy.
Weak signals may be expected if the radio is
operated near steel bridges, power lines, or other electrical circuits. The
siting of a tactical radio station usually is a compromise between the
technical requirements for transmission and reception and the tactical
considerations of cover and concealment.
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