Hi, Ken.
Just to clarify ... I didn't say that the antenna needed a good ground
to work. I said that it's radiating efficiency was dependent upon
whether the ground was lossy or not, the same as any vertically
polarized antenna close to ground. I was going by the picture I saw on
your website that showed it resting on or near ground.
If the antenna were positioned far from ground, such as on top of a tall
building, the MRA would function more like an elevated ground plane
antenna and radiation efficiency would be less a function of ground
conditions. That would be a pretty tall building at AM broadcast
wavelengths, though.
I remain impressed by the ambitious effort you put into reducing the
conductive losses of the MRA, but it just seems to me that for most
installations the same or better performance could be gotten at much
lower cost via more conventional means of loading. It would be
interesting to compare far-field measurements of the MRA with, say, a 25
foot top-loaded vertical with a heavy ground mesh under it.
Best of luck with your upcoming tests.
Take care es 73,
Dave AB7E
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