Re: Antennas-History (What's Going On?)
- From: Steve Noll <sjnoll@xxxxxxxxxxxxxxxxxxxx>
- Date: Sun, 27 Nov 2005 18:33:15 GMT
On Sun, 27 Nov 2005 17:29:19 GMT, "W. Watson"
<wolf_tracks@xxxxxxxxxxx> wrote:
>I hardly know where to start with this topic. If one picks up some of the
>fairly popular (available?) books on the matter, the authors invariably
>start throwing different types of antennas at the reader, yagi, helical,
>dipole, folded dipole, parabolic, loop, dish, microwave, quads, etc. For
>example, I'm looking at an older book on the topic I bought some 20 years
>ago, The Radio Amateur Handbook by Orr and Cowan. The book is basically for
>builders. Many such books are. What about the underlying methodology behind
>this? More generally, here's my question.
>
>I would guess that in the beginning (late 1800s) the simple dipole was it.
>As years passed, the complexity of antennas has increased. What was the
>driving force for these changes? For example, how did the inventor of the
>Yagi (Yagi-Uda) ever dream up the idea for the antenna? Was it the
>application of theory or did he just get lucky? In fact, is there some
>underlying theory that drives the design of antennas? For example, the
>computation of radiation patterns. I'm sure these days the computer would be
>an aid, but what theory and application drove the development of varied
>designs before 1960? When did Maxwell's equations seriously get used for
>this? What suggested a tin can could become an antenna? How did anyone think
>up the idea of a microwave antenna?
>
>I would think that in the case of antennas that are used for different parts
>of the EM spectrum a driving force would be the consideration of the wave
>itself. For example, it would seem unlikely an x-ray antenna (I believe
>there is such a thing on one of the space satellites used in astronomy)
>would be anything like one used to receive TV. Certainly the 'antenna' to
>collect visible light is different than that for AM radio.
Antennas are a blast! I ran the antenna measurement ranges at three
of the West Coast VHF/UHF Conferences. I've not seen much on their
history, but if you want underlying theory search the used book stores
for these classics:
"Antennas" by John Kraus, ISBN 07-035410-3.
"Antenna Engineering Handbook" by Johnson & Jasik, ISBN 0-07-032291-0.
"Microwave Antenna Theory and Design, Ed by Silver (MIT Rad Lab
series) [rare].
Also nice is "Antenna Measurement Techniques" by Gary Evans, ISBN
0-89006-375-3
You might find some more answers on rec.radio.amateur.antenna
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