J. B. Wood wrote:
In article , Roy Lewallen
wrote:
All I can say about what antenna publications and commercial antenna
manufacturers say is that a very large fraction of it is just plain
wrong. Consequently, they're very poor sources of information. Good
information can be found in textbooks and professional publications, and
very few other places. One exception (that is, one good source not in
these categories) is the _ARRL Antenna Book_, since when Jerry Hall
overhauled it (15th Edition if I recall correctly). The current editor,
Dean Straw, is knowledgeable about antennas and very conscientious about
correcting errors and misinformation. So it's become the only reference
I know of which is fundamentally accurate while keeping explanations at
a level which is easily understood by non-professionals.
Hope this helped.
Roy Lewallen, W7EL
You got that right, Roy. Do marketing departments ever talk to the
engineers? At least I haven't seen a dial 1-800 TV commercial such as
"Call right now and we'll include the matching network and balun free of
charge. But call right now and we'll also include a CFA free!"
Adding to what you said above how about a little gray box that can save
you up to 25% on your electric bill (you can Google this one). Sincerely,
and 73s from N4GGO,
John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337
------------
I have quite a few engineering books on antennas (that I use G), so I
can appreciate the value of good, solid engineering text/sources.
However, the point that the OP was trying to make was that it is likely
that superconductive radiating elements could establish the need for a
serious rethinking of antenna theory. After all, superconductive
radiating elements did not exist before and the math has not been done.
Perhaps, their inclusion, will demand something more than a simple
extrapolation of existing antenna theory. I believe this to be the point
of the OP.
I added the other type of radiating element, plasma radiators, as a part
of the same discussion with the same reasoning behind it. Can you
imagine an antenna ray that only manifests itself physically when
needed? Wow!
Ed, NM2K