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Old November 9th 05, 01:33 AM
Richard Clark
 
Posts: n/a
Default Antenna gain question

On Tue, 08 Nov 2005 16:13:34 -0800, Jim Kelley
wrote:

It is fixed by creating a uniform field. As I said before, integrating
the results from a large number of individual point sources (rather than
superposing the fields from a large array of point sources) would not
produce an interference pattern.


Hi Jim,

Here you are clearly wrong in some presumption. For one, I have done
exactly as you have demanded should be done and you find an error. I
have responded several times to this identical complaint you've
offered, and you have neither offered what that error is, or where I
differ from what you insist in integrating the results. It seems to
me in performing it exactly as you describe it, that I have very
little choice in that matter anyway and barring further elaboration in
how my fulfilling your imperative differs from your imperative, your
point remains rather elusive.

hence an interference pattern is immaterial to the loss of
power as both designs suffer the same pattern - and equally I might
point out, if other arguments are consistently applied that equal
powers should be exhibited.


This is apparently incorrect, as both antennas should produce the same
result.


"Should" is the operative word here. "Doesn't" is clearly exhibited.
You don't explain the "Should" and you clearly have issue with the
"Doesn't," but to this point you and others haven't got much to offer.
As I put the challenge to Roy, offer your own model that fulfills the
"Should." Results haven't exactly flown out of that yet, if ever.

One wouldn't have to do as much handwaving and fast talking if the field
was uniform, Richard.


A circular uniform field? And one that exists without a pattern of
interference within it? That could only exist at the beginning of
creation reverse filling the void of the cosmos.
THIS is hand waving. ;-)

However, let's just cut to the chase in that you are clearly disturbed
by this "interference pattern" that the tool so clearly reveals. What
about it is so inimical to your expectations? The partitioning of the
problem into multiple sources dates back to Huygens' principle.
Predating EZNEC by 300+ years suggests that the math has more or less
stabilized such that the model confirms it.

73's
Richard Clark, KB7QHC