Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
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!