Isn't this a "Vertical dipole"? Two quarter wave radiating elements? And tower
behind it will be some kind of reflector/director depending on height. The
radials seem unimportant if thought of this way.
Tim N3QE
________________________________________
From: Topband [topband-bounces@contesting.com] on behalf of Carl
[km1h@jeremy.mv.com]
Sent: Thursday, September 05, 2013 9:17 AM
To: topband
Subject: Topband: Are stacked verticals feasible?
Assuming that sufficient tower height was available, guy wires are insulated
or broken up into short non-resonant sections. Tower face is 12 or 18".
Start at 1/4 wave up with a 1/4 wave ground plane with radials sloping at
about 45 degrees. The vertical wire is 6-12' away from the tower face.
Then a 1/4 wave (or 1/8) up install a duplicate.
What does EZNEC say about this?
With the different spacings?
Effect of starting lower and how low before there are ground related
problems?
Phasing with coax or a LC network?
Switching in a delay line to tilt the lobe up a bit?
Curiosity got the cat!
Carl
KM1H
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Topband Reflector
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Topband Reflector
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