Re: Waveguide TC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

This is pretty standard thing.  We do it all the time at work when testing 
breakdown at high powers in waveguide. One way is called a racetrack where 
you have a circular (logically) loop of waveguide that is an exact multiple 
of the wavelength. You then couple power into the loop with a directional 
coupler, and the circulating power builds up until the losses equal the 
amount being coupled in.

You can also make a standard cavity resonator and drive it.  Circular 
cavities are often used in plasma chemistry, where you run a reaction 
vessel in the center of the cavity, and the high field ionizes the 
reactants.  I've seen these using standard 1000W microwave oven magnetrons 
at 2.45 GHz as the drive.

One can also make a transmission line that's about a quarter wavelength 
long and drive it with a suitable matching network at one end which is 
shorted, leaving the other end open. The line acts as an impedance 
transformer using Zout*Zin = Zline^2, and if Zin is really small, Zout is 
really big, implying high voltage for a given power (or, another way of 
looking at it, you set up a standing wave in a high Q resonator (i.e. the 
transmission line).


At 05:20 PM 12/12/2002 -0700, you wrote:
>Original poster: "Harold Weiss by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><hweiss-at-new.rr-dot-com>
>
>Hi All,
>
>Many years ago, I read an article about a very high frequency resonator 
>system that used a cavity for a secondary.  It was a CW system that fed 
>the resonator.  The description of how it operated was exactly like a TC, 
>and I think, it was used to produce high voltage.  Has anyone seen this 
>text, and/or does anyone know who did these experiments?
>
>David E Weiss