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Cecil Moore wrote:
gwhite wrote: The strongest argument for dropping the impedance matching concept is PA efficiency, and therefore maximum signal swing. Obtaining maximum swing is a load line issue. So what impedance does the reflected wave encounter? Don't know. Whatever mismatch there is, at whatever moment in time, it simply results in reflection back towards the load. Reflections could also cause additional non-linearity in the PA. Therefore reflections for higher powered PA's are directed off to a dummy load via a circulator. |
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