Richard Clark wrote:

On Fri, 05 Nov 2004 13:37:27 -0800, Jim Kelley
wrote:


Point being that antenna gain has spatial implications which Rr by
itself could not provide in the solutions.


Hi Jim,

Not sure where this is going, so I will stand with my own statements.

I wouldn't have it any other way, Richard.

The examination of the underlying theory taking place in this discussion
resolves in different ways. Any other 'work in kind' would depend
largely on which way one resolves the theory. Horse first, then cart.

Reasonable questions have been posed here. Some of the points being
raised remain to an extent, unreconciled with certain aspects of
conventional treatments. Obviously, thanks in no small part to
empirical methods, this poses no greater hinderance to the design of
efficient antennas than does the lack of a precise understanding of the
nature of turbulent flow to the design of efficient fluid pumps. I find
any contention that no further investigation is necessary to be less
than convincing. On the contrary, the work done by the oft cited E&M
engineers clearly indicates there is more to the story - a point that
said engineers would undoubtedly concede without hesitation.

On the other hand, if the impedance of the
coil is not constant from one end to the other, and it in fact does have
some real physical and/or electrical length, then I think the radiation
resistance of the antenna would have to be effected by its presence in
the circuit. That is, if indeed Ro is the integral of disributed r
along the entire physical and/or electrical length of the antenna
(credit for that formula going to an esteemed contributor to this
newsgroup earlier today). Or perhaps more concisely put, if the loading
coil itself contributes to the field radiating from the antenna, then it
should likewise have a Rr associated with it. The converse would of
course still be true.

This returns us to matters of degree. By simple observation comparing
the standard full sized radiator to ANY of the iterations, it is
obvious that nothing significant can be said of the physicality of the
load, much less its contribution. In other words, is there some
magical coil or magical placement that would create a short
super-radiator that exceeds the performance of the standard
quarterwave? [no here can recognize a eh/cfa claim?]

Let's put a handicap on this. Is there some magic combination of
coil/position that would even EQUAL the performance of the standard
quarterwave?

Absent a thorough understanding of the phenomena, one might be inclined
to conjecture about magical things. But I'm inclined toward taking
satisfaction from persuing a thorough understanding of the phenomena
rather than from strutting the pretense of already having one.

73, Jim AC6XG