WKOriginally posted by windoze killa@Apr 9 2006, 06:52 PM
Firstly, my previous comment was meant in humour.
I taught transmission lines and RF fundamentals for a few years. One thing I must point out about the quotes above is that they refer to the "perfect" transmission line. Of course the is no such thing but we need a starting point.
A point about wave guides. They are more or less the same as any other transmission line. Because of the frequency that they are used at they rely totally on skin effect, that wonderful thing that stops solid conductor coax from working well at really high frequencies.
Another thing a lot of people forget about in RF design is velocity factor and propagation delay. Due to phase shifts through the imaginary LC circuits in a transmission line there is a delay over the length of the line.
No worries, I took your comment entirely in that vein. There are lots of things about this stuff that are less than obvious. The first time I saw an impeadance plot on a Smith Chart display I was blown away.