> "orma" <o...@aviation-mechanics.com> writes:
> As far as I know all VOR antenna are V pole antenna. I think that
> the V is significant, though I'm not qualified in Radio electronics.
> All of the antenna sold by the verious aviation suppliers seem to
> be of that shape.
The V shape of the nav dipole antenna is one of convenience and
mechanical stability only.
What is more critical, especially for buried-inside antennas, is the
polarization. VOR especially is horizontal polarization. FAA
publications mention this specifically and point out that if a vertical
(polarization) antenna is used for VOR reception, signal reflections
from the VOR transmitter site may affect the accuracy of the
received signal. This may also be meaningful when using a handheld
radio for VOR -- be sure to turn the whip antenna horizontal if you
are using the VOR signal for navigation.
The aircraft communication radios, OTOH, use vertical polarization.
When selecting sites inside the airframe for buried antennas, keep the
polarization correct: comm radios are Vertical, and nav radios use
Horizontal.
For more information than you'll ever need, the Ham's ARRL Antenna
Handbook cannot be beaten.
Art Cacella 1970 American AA-1 N6155L "Dinkie"
N4ZD 1972 KR-1 Plans, still not started <sigh>
( but four metal homebuilts underway )
Winston-Salem, NC
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