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Old March 24th 04, 03:13 PM
Richard Harrison
 
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Scott, N0EDV wrote:
"Anyhow, whoever wants to give it a try, have fun and let us know how it
works!!"

I don`t have EZNEC but it seems to be very useful.

Crossed dipoles are often used as quasi omnidirectional antennas.
Broadcasters call it a "turnstile".

If the two dipoles are fed in phase, a figure-eight pattern results.
This is similar to the pattern of a single dipole but at 45-degrees to
the crossed dipoles.

The usual practice is to excite the dipoles 90-degrees out-of-phase.
This produces a nearly circular pattern in the plane of the turnstile.

One could get a choice of patterns with crossed dipoles by feeding them
in-phase, out-of-phase, and in quadrature for an omni pattern. Then
using the dipoles one at a time, two more diirectional patterns are
available.

Best regards, Richard Harrison, KB5WZI

 
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