[TenTec] Antenna measurements

[bcarling@cfl.rr.com]

This is getting fairly esoteric.
Like... If a tree falls in the forest and nobody is there to listen does it make a sound?
 Answer: Yes of course it does.

Bry Carling
http://www.af4k.com
http://alltheaboveband.com


----- Reply message -----
From: "Stuart Rohre" <rohre at arlut.utexas.edu>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Subject: [TenTec] Antenna measurements
Date: Tue, Apr 23, 2013 4:44 pm


Yes, that case of an accelerating current would radiate per the acceleration criteria in 2nd Edition of Kraus.  One type of current that would be accelerating is a simple harmonic oscillation.  The harmonic oscillation, like a sine wave, has changes of direction.

A stationary charge does not radiate he states.

Note the other example, (counter example) a uniform current at constant velocity in a straight wire, (non oscillating) does not radiate.

In my Kraus, this part of Chapter 2 is section 2-27

Interesting that ed. 3 is so different.  I would think something like mine would be in the first 50 pages or so of your book.

However, I have seen books like the old ARRL Handbooks start right in with wave theory of the E and H field, and never really say what is the process of radiation, other than it happens from an antenna.

-Stuart
K5KVH
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