At 07:46 AM 6/27/2005, Roy Thistle wrote:
>Wes:
>The current guru of antenna theory is Balanis. His book "Antenna Theory"
>is available at Amazon.com There are many other books on antenna theory.
>Your local university engineering library would have many.
>
>Another seminal work is by Stutzman. Again, available at Amazon.com.
>
>Though not strictly antennas, Sadiku's book, Elements of Electromagnetics,
>(any edition) has a chapter on antennas, and there are many used copies
>of it around.
>
>As these books point out, ideal antennas are linear devices and can be
>"built" by adding together (by superposition) infinitesimal current
>elements. For such an current element, the electric field [Volts/meter],
>far from the antenna (many wavelengths), depends on the angle from the
>vertical axis, and the inverse of the radial distance from the origin.
>There are many computer programs (some by hams) that provide graphical
>results: MultiNEC, EZNEC, NEC-Win.
>
>For what it is worth, ideal antenna theory is a beautiful example of the
>direct application of Maxwell's equations to a problem in
>electromagnetics: antennas. And supposedly, what will not work in theory,
>will not work in reality. Yet, what works in theory is often confounded by
>reality.
>
>This all said, I always had more fun making "em" then trying to understand
>"em".
>
>r.
If you want a good textbook that is more accessible to non-mathemeticians,
I'd recommend "Antennas", by John Kraus (W8JK, sk). It's a classic text,
now in the 3rd edition, but any of the earlier editions will work as well
for what you're looking at. Generally good exposition, straightforward
math, nice drawings. And oddly enough, a lot of the HF antenna examples
happen to be for frequencies like 14.15 MHz.
Kraus is written from the "Here's what antennas do, why is that?" viewpoint
Balanis is written from the "here's Maxwells equations, where can we go
from there" viewpoint.
Unless you want a career as an electromagnetics person, you probably don't
need the rigor of Balanis.
Jim,W6RMK
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