From my old radar fixin' days (Raytheon and Lear-Siegler units): at extremely high frequencies, the skin effect becomes so great that the waveguide that carries the energy is hollow, much like a rectangular pipe. IIRC the cross section of the tube is calculated using the wave length of the carrier on whichever axis is used to polarize the antenna. Typically the waveguide inner surface is gold plated, and the pipe is pressurized to prevent moisture intrusion which due to localized heating of condensate will cause severe degradation of the system. Also seem to recall that the THEORETICALLY calculated speed of the propagated energy in the waveguide can be somewhat greater than the speed of light in some systems. Been a long time, this is subject to constructive revision based on technological advances and corrections to an aged memory!
Checking edit function!
This post was edited by smallercrawler at 06:43:15 06/07/13.
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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