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Roger Sparks wrote:
The bottom line in a nutshell? I'll try. Thanks Roger, good stuff and much appreciated. My digesting of your spread sheets is about to be interrupted by surgery. During those times, the power applied to the transmission line is much HIGHER because the reflected wave reflects from the load and source, and merges/adds to the forward wave from the source.) May I suggest that you use the word "redistributed" instead of "reflected" as does the FSU web page at: http://micro.magnet.fsu.edu/primer/j...ons/index.html For the purposes of this discussion, I would suggest that the word "reflection" be reserved for something that happens to a single wave. When two waves are superposed, energy can be redistributed but technically it is not an ordinary reflection. I once used the word "reflection" to describe both phenomena and it confused people. Now I am careful to call the reversal of energy flow due to superposition a "redistribution" instead of a "reflection". For instance, the multi-colored patterns seen when a thin film of oil is on top of a puddle of water is not an ordinary reflection but a combination of multiple reflections and interference. In addition, the reflection coefficient seen by the reflected wave in our examples is 0.0 since the source impedance equals the characteristic impedance of the transmission line. There are no ordinary reflections when the reflection coefficient is zero. -- 73, Cecil http://www.w5dxp.com |
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