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Old May 11th 07, 08:42 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jun 2006
Posts: 1,374
Default Phase Shift through a 75m Texas Bugcatcher Coil

Jim Kelley wrote:

You'll forgive me if I'm not in a mood to be generous. You might
consider adding some ordinates to your phase plots. Also, some credit
to Roy for making all of the calculations for you might be appropriate
as well. (You might ask him how he does it.) We still haven't seen
any of your work. By work I mean calculations, not typing i.e.
assumptions, deductions, inferences, and proclamations. Assuming
there are actual values, it would be good to know, for example, what
calculations were made in order to arrive at the phase angles in the
plots. The only equations you provide are for instantaneous amplitude
as a function of phase angle for a standing wave. Obviously that
isn't suffiencient for obtaining the data in your plots. It's very
poorly done. D+


EZNEC uses NEC-2 for calculations and produces results essentially
identical to those from NEC-2. The method is well documented in the
NEC-2 manual, available on the web. Like NEC-2, EZNEC reports the
magnitude and phase of current at each segment of the model. It
calculates these from fundamental electromagnetic principles. No attempt
is made by NEC-2 or EZNEC to consider the antenna as a transmission line
or calculate any supposed traveling waves. Decomposition of the
verifiable NEC/EZNEC results into traveling waves or anything else is
strictly Cecil's doing, and any conclusions he reaches from it are also
his only.

Roy Lewallen, W7EL
 
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