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Old November 4th 04, 07:34 PM
Gene Fuller
 
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Richard,

What in the world are you babbling about????

Nothing I wrote conflicts with Terman or Balanis. Did you see a ghost
message from me that I did not write?

73,
Gene
W4SZ

Richard Harrison wrote:
Gene, W4SZ wrote:
"Do you have a reference to an analytic treatment using the traveling
wave model that could give results comparable to NEC2?"

NEC2 must agree with reality else it is worthless.

Terman agrees with Balanis and is only wrong when theory is revoked.
Terman says on page 866 of his 1955 edition:
"A wire antenna is a circuit with distributed constants; hence the
current distribution in a wire antenna that results from the application
of a localized voltage follows the principles discussed in Chap. 4, and
depends upon the antenna length, measured in wavelengths; the
terminations at the ends of the antenna wire; and the losses in the
system. The current distribution is also affected by the ratio of wire
length to diameter in situations where the antenna is unusually thick.
(see Kraus, Schelknoff, and Friis) Under most circumstances, the losses
are sufficiently low and the ratio of wire length to diameter
sufficiently great so that to a first approximation the current
distribution can be taken as that for a line with zero losses; it then
has the characteristics discussed in Sec. 4-5."

Sec. 4-5 is titled: "The Effect of Attenuation on Voltage and Current
Distribution - Lossless Lines" This is in Chapter 4, "Transmission
Lines".

Best regards, Richard Harrison, KB5WZI


 
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