A simple vertically mounted
Best for communicating with a radio mounted in a moving vehicle.
Provide a stronger signal at frequencies up to 50 MHz when antenna
lengths are limited (10 feet or less).
Less affected by
Less interference produced or picked up from strong VHF and UHF
broadcasts. (Commercial television and radio stations [VHF and UHF
broadcasting stations] use horizontally polarized antennas.)
A simple horizontally
mounted half-wave antenna is bidirectional.
The advantages of using
horizontally polarized antennas are as follows:
It is bidirectional--accepts signals from all directions except the
direction in line with the ends of the antenna.
It is less likely to pick up man-made interference (other tactical
When located near dense forests, it suffers lower output power
losses than vertically polarized antennas (especially above 100
Small changes in antenna location do not cause large variations in
field intensity when antennas are located among trees or near
The transmission requirements of field artillery radios are
Line-of-sight radio transmission is accomplished
direct wave component of propagated ground waves.
Regardless of the type of antenna polarization (horizontal
or vertical), the direction of travel of radiated radio
waves is considered to be parallel to the surface of the