In article ,
John E. Davis wrote:

I modelled a copper-pipe EDZ, mounted at the top end of a conductive
mast. This one came out with 5.85 dBi in the favored direction, and a
2.5 dB front-to-back ratio.

Have you considered using the much simpler moxon? This one has a
forward gain of 5.6-6.4dBi (6.2@146MHz) and a front-to-back ratio of
18-31dBi (29@146MHz). It uses #12 AWG wire. Thanks, --John

If I were actually seeking a high front-to-back ratio, a Moxon would
be a good choice!

I actually developed the EDZ models for a different application... the
main antenna on a 2-meter repeater installation. We want a reasonable
amount of gain, and a near-omnidirectional pattern. The high
front-to-back ratio of a Moxon would not be appropriate in this case...
the 2.5 dB ratio of the side-mounted EDZ is probably as much as we'd
want to accept, given the shape and size of our service area.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
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