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"Owen Duffy" wrote:
You talk of the "reflected wave" as if it has inertia, that it must keep travelling when it reaches the junction of the feedline and the antenna? You are not alone in speaking that way, but thinking that way will get in the way of understanding what is happening. Next thing, you will be thinking that the reflected wave must travel back to the PA anode and will be absorbed there causing overheating. _______ If you write of reflected power existing on the transmission line between the tx output connector and the antenna input connector, then yes -- with sufficient tx output power and a poor enough match at the antenna feedpoint, that reflected power can cause transmission line and/or tx PA component failure. I've analyzed and repaired many such failures of these installed systems in my pre-retirement career, and know this first hand. Conventional theory also supports this result. RF Visit http://rfry.org for FM transmission system papers. |
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