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Re: [TowerTalk] modeling interaction

To: wc1m@msn.com, "Tower" <towertalk@contesting.com>
Subject: Re: [TowerTalk] modeling interaction
From: Jim Lux <jimlux@earthlink.net>
Date: Tue, 21 Jun 2005 12:49:07 -0700
List-post: <mailto:towertalk@contesting.com>
At 12:27 PM 6/21/2005, Dick Green WC1M wrote:
>
>If it appears to the experts that I'm doing things correctly, can anyone
>give me a good example of two antennas that should show some interaction
>when placed in close proximity? I'd like to model a case of known
>interaction so I can make sure I'm doing this right.

Try two parallel dipoles a few meters apart and in the same horizontal 
plane. Make one dipole a bit longer or shorter than the other.  You should 
see a definite change in the pattern.

You might not see a huge change in your situation, especially if you're 
just looking at main lobe gain.  Interactions will usually manifest 
themselves more as nulls filling in or F/B going worse.  Also, look at the 
vertical pattern.  Even huge interactions won't change forward gain all 
that much, unless it screws up the coupling among the elements.


>
>73, Dick WC1M
>
>
>_______________________________________________
>
>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
>Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
>any questions and ask for Sherman, W2FLA.
>
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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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