Hi Kevin, Your drawing looks like a cage dipole to me. For a given
band a cage dipole has a much larger bandwidth than a single wire dipole
for that same band.
Bob NZ6G
On 5/23/2022 11:54 AM, Kevin Zembower via TowerTalk wrote:
There's a drawing at
https://www.dropbox.com/s/8omfop6trejx211/IMG_20220523_144427650_BURST000_COVER.jpg?dl=0
despite my very limited artistic talent.
-Kevin
KC3KZ
-------- Forwarded Message --------
Subject: What kind of antenna is this?
Date: Mon, 23 May 2022 12:22:01 -0400
From: Kevin Zembower <[email protected]>
To: [email protected]
Hello, all,
At Hamvention, I saw a couple of antennas that seemed to be part of a
multi-band hex-beam. They consisted of two rings about 2 inches in
diameter, separated by about 3 feet, with 5 parallel wires between them.
On closer inspection, it seemed like a single wire double back and forth
between the rings. I've also seen a similar arrangement on Naval ships,
albeit much larger. They're mounted horizontally and seem to be fed from
either end. The literature on the sales table might have referred to
this as a 'Short 40.' The table was busy, and I didn't get to talk with
the sales representative about it.
Can anyone tell me the type or name of this antenna? Can it be modeled
with NEC? What are it's characteristics, advantages and disadvantages?
Thanks so much. Looking forward to learning more.
-Kevin
KC3KZ
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