View Single Post
  #198   Report Post  
Old September 19th 08, 01:02 AM posted to rec.radio.amateur.antenna
Jeff Liebermann[_2_] Jeff Liebermann[_2_] is offline
external usenet poster
 
First recorded activity by RadioBanter: Jun 2007
Posts: 1,336
Default Equilibrium and Ham examinations

On Thu, 18 Sep 2008 14:28:18 -0700 (PDT), Art Unwin
wrote:

...where as, your expertise in mathematics can test
the logic to its limits which defy opposition


Ok, let's test your logic. So far, I've seen exactly one prediction
of yours worth testing. It's you claim that current flows primarily
in the center of a conductor. Avoiding the math for now, let's do the
necessary thought experiments. If this were a court of law, the judge
would prepare a set of rhetorical questions, all of which must be true
if the plaintiffs claims were true. I'll do the same.

1. If current flows along the inside of a wire, and not on the
outside, how does the field radiate through the alleged non-conducting
outer part of the wires? The radiation would be trapped inside the
conductor, only to perhaps emerge at ends.

2. If current flow along the inside of a wire, then it would seem
that increasing the effective diameter of the conductor would have no
effect on its impedance. Measurements of the Q of large diameter
conductors versus small diameter conductors have show that impedance
goes down with an increase in wire diameter.

3. How does a cage antenna work? The effective diameter is huge, but
there's a giant hole in the middle, through which no current is
conducted. If most of the RF current flowed through the center, and
there is no center, then a cage antenna can't work.

I can conjur a few more rhetorical questions, but these should be
sufficient to illustrate the problem. Your antenna current
distribution model does not fit very well with tested reality.

Got any more prediction? I need the target practice.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558