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B O D Y P O S I T I O N S
The following statements assume that the antenna is
attached to the chest area. An upright standing position
provides the maximum signal propagation. Any deviation from
the standing upright position will cause signal degradation.
When the wearer is standing upright, movement of the arms
across the chest will cause changes in the propagated signal
pattern. However, movement of the arms along the sides of
the body or to aback pocket will not appreciably effect the
signal, provided the arms do not pass in front of the antenna.
Folding the arms across the chest can reduce the signal by as
m u c h a s 4 0 % .
Sitting down in achair, either wood or metal, also results in
areduction of the signal. This is due to the body antenna
being closer to the ground and the possibility that the antenna
is no longer vertical. In addition, with the wearer sitting in a
metal chair, signal reflected from the metallic chair
components can cause considerable distortion of the signal
pattern.
Lying down flat on the back results in most of the signal
being propagated straight up, with very little horizontal
propagation. With the wearer lying flat, the antenna is
horizontally polarized, which is cross-polarized with the
receiver antenna. This will result in greatly reduced received
signal.
R E C O M M E N D A T I O N S
The body transmitter is an indispensable tool of law
enforcement and is used very effectively in intelligence
gathering and officer protection applications. The wearer
should remain aware of the limitations imposed by the body
antenna in order to obtain maximum benefit from the body
t r a n s m i t t e r. S o m e o f t h e s e l i m i t a t i o n s f o l l o w ;
1. Maximum signal propagation is forward from the
antenna and away from the body. Minimum signal
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