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Re: Impedance &c.



"... the early radio transmission example of a coax to "monax"
transition, which would allow the em wave to stay attached
to a single wire, ...."


is this: =====<-------->======? not shown, the center wire in the
co-ax, "=====". I've never seen a maths analysis of this. The
conical horns serve as Z matching?

bc


Brian Whatcott wrote:

At 01:36 AM 1/6/2004, John Denker, you wrote:


///
Magic tees for waveguides. Anti-reflective dielectric coatings
for lenses, and reflective dielectric coatings for mirrors.
Antennas. This is serious physics and serious engineering.



///



The stub
was 1/4 wavelength long. It was dead-shorted inner-to-outer at
the end, thereby heat-sinking the inner.




For some reason, John's anecdote reminded me that following
the early radio transmission example of a coax to "monax"
transition, which would allow the em wave to stay attached
to a single wire, (if it did not turn any sharp bends) without
dielectric losses, nor radiative losses typical of parallel wires;
there is a comparable optical example which allows a light wave to
stay attached to the outside of a fiber optical light guide...


Brian Whatcott Altus OK Eureka!