Inverted vee dipoles do produce some vertically polarized radiation off the ends. However, that vertical component has maximum gain at zenith, i.e. straight overhead. It does not contribute to any significant low-angle radiation. You can see this by doing an antenna model.
73, John W1FV -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of Jim Brown Sent: Sunday, March 15, 2020 2:36 PM To: [email protected] Subject: Re: Topband: NVIS Antenna Hi Ed, I've studied this extensively for horizontally polarized antennas, but only for flat ones; I thin that inverted Vees have some vertical components. For horizontally polarized antennas, maximum gain at high angles occurs at a mounting height of about 75 electrical degrees, and falls by only about 1 dB if raised to 120 electrical degrees. By "high," I'm talking 70 degrees elevation. Also, RX is different from TX, in that with RX we don't care about loss, only signal to noise. Ground loss is a contributor to those variations based on mounting height. N6RO, an old hand on topband with a great antenna farm, rearranges his M/6 station for topband contests to bring LOTS of his antennas to the station he uses single-op. That study is here. http://k9yc.com/AntennaPlanning.pdf 73, Jim K9YC _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
