don't.
Jim - KR9U
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
donov...@starpower.net
Sent: Friday, March 04, 2016 12:04 PM
To: Topband@contesting.com
Subject: Re: Topband: Comments on High Performance RX Antennas for a Small
Lot (Webinar)
Hi Tim
h 4, 2016 2:59:34 PM
Subject: Re: Topband: Comments on High Performance RX Antennas for a Small
Lot (Webinar)
The RDF seems to be the best we have at the moment, for taking a
3-dimensional pattern and turning it into a single number. Of course the
details of the 3-dimensional pattern are lost.
The RDF seems to be the best we have at the moment, for taking a
3-dimensional pattern and turning it into a single number. Of course the
details of the 3-dimensional pattern are lost.
In addition to the quantitative RDF or S/N numbers, the qualitative change
in pattern as you move up the RDF is
on High Performance RX Antennas for a Small Lot
(Webinar)
In this webinar, it was asserted (without explanation) that for every 1 dB
increase in RDF, you get 1.5 to 2.0 dB improvement in S/N ratio. I've never
heard that before and don't even see how it makes sense. Actually, I don't
even know how you
Hi Rick,
I would also think that peak radiation angle of the RX antenna versus the
arrival angle of the desired signal is also a big variable that would not
allow the relationship you heard on the webinar to be true under all
conditions. As you said it probably is too much of a generalized
In this webinar, it was asserted (without explanation) that
for every 1 dB increase in RDF, you get 1.5 to 2.0 dB
improvement in S/N ratio. I've never heard that before
and don't even see how it makes sense. Actually, I don't
even know how you can make generalizations like that
unless you are
