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![]() "Camelot" napisal w wiadomosci ... Hello, I have some doubts about standing waves on antennas that I hope you could clarify! As far as I understood, in a generic transmission line where we want only carry power from a source to a load, we need to cancel the reflected wave by adapting the load with the impedance of the line. The result of this operation is S11=S22=0 and VWWR=1 that means no standing waves. "VWWR=1 means no doubled voltage. As far as I understood, in an antenna we want to also avoid standing waves by having VWWR=1 in order to avoid overloading problem to the power stage... From theory I know that the best radiating condition for an antenna is when it resonates, that is, when there is a standing wave… is that correct? Standing wave is if the electrons reflects from the end. How this condition is compatible with a VWWR=1 (no standing waves) for a good antenna matching? Is there something that I’m not catching? You simply do not know Tesla's discovery. Transmitting antennas are the electrons guns. In poor antenna the voltage is doubled (at ends) and you have the standing waves. In perfect antenna electrons jump off from the ends of a dipole and the voltage is not doubled. Of course Tesla's antenna radiate the alternate electric field. S* |
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