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Re: [TowerTalk] Effect of element shape was: Re: InnovAntennas contact i

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Subject: Re: [TowerTalk] Effect of element shape was: Re: InnovAntennas contact info
From: David Gilbert <xdavid@cis-broadband.com>
Date: Wed, 20 Mar 2013 10:41:39 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>

Sorry, Chip.

Both Cebik and the paper linked below disagree with you, and therefore so do I.

http://www.academia.edu/2441284/Design_and_Development_of_UHF_Moxon_Antenna

Ever wonder why you never see a three element Moxon if a Moxon is nothing more than a close-spaced yagi with bent ends? Apparently you haven't.

Dave   AB7E



On 3/20/2013 10:22 AM, W1YW@aol.com wrote:
Sorry Dave; the Moxon phasing is caused by the 1/8 wave separation. It is a
  close-spaced 2 el Yagi.
The Hex is a Moxon with W bendbacks of the driven and parisitic. The virtue of the Moxon is that it fits in a form factor that is about
1/4 wave by 1/8 wave, as opposed to 1/2 wave by 1/8 wave. This  makes it
practical to support as wires as opposed to tubes. The Hex shrinks the  long
extent a bit more.
Best,
Chip W1YW
------------------------------------------------------------------------- In a message dated 3/20/2013 1:16:10 P.M. Eastern Daylight Time,
xdavid@cis-broadband.com writes:

Yes.  A true Moxon has less forward gain (only slightly so on  a proper
design) and less front-to-side than a normal yagi, but it has a  really
deep notch off the back.  The statement that a Moxon is  nothing more
than a 2 element yagi with bent ends is simply false. There  is a phasing
component that is not purely  parasitic.

73,
Dave    AB7E
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