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RE: [CQ-Contest] physical antenna diversity reception

To: cq-contest@contesting.com
Subject: RE: [CQ-Contest] physical antenna diversity reception
From: W0UN -- John Brosnahan <shr@swtexas.net>
Date: Tue, 16 Mar 2004 08:36:36 -0600
List-post: <mailto:cq-contest@contesting.com>

P.S. I have been some discussions that the
     antennas need to be wavelengths apart,
     but I think that is when you are trying
     to copy a single station and want the
     second antenna to deal with QSB and path
     differences, and wide separation is
     probably an advantage there.
     Perhaps what I'm doing would be better
     described as "directional" diversity.

Although you have some "directional" diversity for a signal whose azimuthal angle is varying, your situation is normally referred to as polarization diversity. What is most common, especially under band-opening and band-closing conditions, is for the polarization to rotate and having separate vertical and horizontal arrays can reduce the associated QSB.

--John W0UN

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