Ron D'Eau Claire wrote:
Some years ago Doug DeMaw, W1FB, published a design that might work for you
in a tight situation. I've considered it here, although the short doublet
has worked well enough that I've not tried it. He bent a doublet at 90%,
like you might for an extreme "inverted V" design, but arranged it so one
radiator was horizontal to the earth, making the other one vertical. He used
guyed aluminum pipe for the vertical radiator and a simple wire for the
horizontal radiator. The system is fed with open wire line and an efficient,
balanced ATU.
I seem to remember this being fed at the bottom, making it a one-radial
ground plane. But maybe it was center-fed at the top, as your
description suggests. Either way, the idea appealed to me, because it
would have high and low-angle components, although both the vertical and
horizontal patterns would be skewed.
One thing that bothered me about this antenna was that there might (I
suspect) be a significant current imbalance in the feedline because of
the two legs' unbalanced relationship to ground. That would cause
radiation loss from the feedline (and noise pickup).
But maybe not -- in which case ths would be a very interesting antenna!
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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