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I apologize. I thought your view of power waves was alleged to hold true
even with loss. If it's restricted to lossless lines (which have purely real Z0), then the total average power does equal "forward power" minus "reverse power". So please don't bother yourself with trying to explain the component of power that's neither the "forward power" nor "reverse power". Roy Lewallen, W7EL Cecil Moore wrote: Roy Lewallen wrote: Well, Cecil, I think we're zeroing in on the flaw in your perception of how the powers add. I don't see how this thread is relevant to the treatment of powers in lossless lines. Perhaps you have misunderstood what I said. A number of people have been trying for a long time to convince you there's a flaw in your logic, but so far you haven't been able to see it. If there's a flaw for lossless lines with purely resistive characteristic impedances, please present it. So far, nobody has. Here's what I said in my magazine article on my web page" "For the purpose of an energy analysis involving *LOSSLESS* transmission lines, we do not need to know anything about the source or the load or the length of the transmission lines." I'm quite sure that if you look carefully at any text where the author subtracts "reverse power" from "forward power" to get total power, that somewhere prior to that the assumption is made that loss is zero and/or the line's characteristic impedance is purely real. Of course, that's why my previous assertions have been only about lossless lines. Do you happen to have a lossless example that proves my concepts about lossless lines are wrong? I have no concepts about lossy lines except that they obey the conservation of energy principle. |
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