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EI7GL....A diary of amateur radio activity

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Interview with W1ZY about Phased Vertical antennas for the HF bands

Posted: 25 Jan 2022 12:08 AM PST https://ei7gl.blogspot.com/2022/01/interview-with-w1zy-about-phased.html


The Ham Radio Live YouTube channel recently had a very interesting
interview with William Des Jardines, W1ZY about a Phased Array Vertical
Antenna as well as a simple Beverage Antenna. A video of the talk is
embedded further down.
I think anyone who is interested in making and experimenting with antennas
will find this of interest.
The presentation is a bit light on graphics so let's address that first.The image above shows the general principle of a phased vertical array. By
using phasing lines, signals from each vertical can either be added
together and subtracted from each other.


The image above shows the view from above of the radiation pattern. Signals coming from the right are added and there is a small gain of about 3dB. The signals from the left are out of phase and there is a large drop in this direction.
With a relay and suitable phasing lines, the direction of the array can be flipped to the right or left at the flick of a switch. This has obvious advantages for say propagation and antenna tests as opposed to waiting for
a Yagi to turn on a mast.


The talk also covers Beverage antennas which are used for receive only, especially on the lower HF bands.
The video is shown below and the part of interest starts at 11:30...
There are a two links for more information.
W1ZY has an article on his substack site HERE
W1ZY's QRZ page also has a LOT of information, see HERE

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