[RFI] Polarization Tests

[Tom Thompson]

Hi Lee,

As you well know, the null on the loop is very sensitive to position.  I 
just oriented the loop to a position without having the benefit of 
seeing the receiver response.  Therefore, as stated in the report, the 
null is not as deep as it could be.  In retrospect, I would use a power 
splitter between the Perseus and my hand held noise receiver, which has 
a very sensitive S-meter, so I could adjust the position of the loop for 
the best null.

Tom

On 6/13/2017 1:42 PM, Lee STRAHAN wrote:
So Tom,
     Am I reading your data correctly, I see only a 9.7 dB difference as 
the loop is rotated from broadside to inline with the vertical source in 
the first two columns of A and B. Or am I missing something? My Eznec 
models of loops show at low angles a near perfect null for vertical 
polarized signals broadside to the loop and a near perfect null for 
horizontal polarized signal inline with the loop? As in your A and B 
tests .
Lee   K7TJR    OR

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Tom Thompson
Sent: Tuesday, June 13, 2017 12:19 PM
To: rfi at contesting.com Contesting <RFI at contesting.com>
Subject: [RFI] Antenna Polarization Tests

Some of you have mentioned in the past about using a tuned loop for 
tracking RFI.  A question has sometimes arose about the direction of the 
null of the loop. Larry Benko, W0QE, and I did some polarity tests using 
various orientations of both the transmitting short dipole and a 
receiving loop and a receiving short dipole. The results are shown here:

http://tomthompson.com/radio/AntennaPolarization/Antenna%20Polarization%20Measurements.html 



73,   Tom   W0IVJ

PS  Sorry for the wrong word before
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