[VHFcontesting] Attenuation from polarity mismatch (Re: C6AFP Six Meter Beacon

[Mike Fahmie]

In a near perfect situation (in free space, exact 90 degree misalignment, perfectly straight elements), I would expect near absolute attenuation, but we never have those conditions.  What we do have is an undefined assortment of approximately vertical or horizontal antenna structures, reflections, slightly bent elements, Faraday rotation, and probably a dozen other phenomena that are above my pay grade.
So....what is the cross polarization attenuation?  Well....it depends!
-Mike-


 
      From: Peter Laws <plaws0 at gmail.com>
 To: vhf contesting <vhfcontesting at contesting.com> 
 Sent: Sunday, January 29, 2017 10:12 AM
 Subject: [VHFcontesting] Attenuation from polarity mismatch (Re: C6AFP Six Meter Beacon
   
On Sun, Jan 29, 2017 at 10:38 AM, Buddy Morgan via VHFcontesting
<vhfcontesting at contesting.com> wrote:

> Of course, I am horizontally polarized.


Undoubtedly, that makes a difference ... but how much?

Does anyone have a scholarly (or even semi-scholarly, e.g., QEX, QST)
citation for the amount of attenuation?  I've heard anywhere from 3 dB
to 30 dB (and WAGs going even higher).  3 to 30 dB doesn't seem like
much to a lot of hams because they don't understand dB, but that's
2x(ish)  to 1000x ...  so I'm thinking one of them is wrong ... and
since we all routinely hear signals of the other polarity I'm thinking
it's closer to 3 than 30 ...

Someone has surely done actual research on this.  So where is it?


-- 
Peter Laws | N5UWY | plaws plaws net | Travel by Train!
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