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On Mar 12, 11:53 pm, Roy Lewallen wrote:
Yes! All that matters to the transmitter is the impedance it sees. It doesn't know or care that you've mathematically separated the delivered power into "forward" and "reverse" components. It doesn't know or care what the SWR is on the transmission line connected to it, or even if a transmission line is connected at all. Think about this - if the transmission line is exactly one-wavelength long and lossless, the transmitter sees exactly the same impedance as the load. At the load, we know reflections occur, but they are same-cycle reflections so during steady-state with no modulation, exactly the same conditions exist at the transmitter as exist at the load if the transmitter has the same impedance as the transmission line. So even if we cannot measure the reflections back into the transmitter, they are no doubt, there - that is, unless one denies the existence of reflections in which case, one needs to explain how standing waves are possible without reflections in a single-source system. -- 73, Cecil, w5dxp.com |
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