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

[Mark Spencer]

Hi I've done a modest amount of listening to signals via 144 MHz tropo on Horizontal and Vertical antennas at the same time on different radios.

About all I can say with any certainty is that I could usually tell which stations were using Horizontal or Vertical antennas by the relative signal strengths.   As a wild guess I'd put the typical loss due to polarization miss match in the range of maybe 15 to 20 dB.   I didn't make any effort to calibrate the S meters of the radios in question.

Hope this is of some interest.

73 
Mark S
VE7AFZ



Mark Spencer

Aligned Solutions Co.
mark at alignedsolutions.com
604 762 4099

> On Jan 29, 2017, at 10:12 AM, Peter Laws <plaws0 at gmail.com> wrote:
> 
> 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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