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Old June 9th 10, 08:36 PM posted to rec.radio.amateur.antenna
Baron[_2_] Baron[_2_] is offline
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First recorded activity by RadioBanter: Jun 2009
Posts: 37
Default Where does it go? (mismatched power)

Geoffrey S. Mendelson Inscribed thus:

If you have a resonant antenna, supposedly all of the power is
radiated.


Yes

(SWR 1:1)


With respect to what !

If you have a nonresonant antenna, some of the power is reflected back
to the transmitter.

(SWR 1:1)

If you connect a tuner and it is "tuned", none of the power is
reflected back to the transmitter.

(SWR at transmitter 1:1, at antenna still 1:1)

Obviously it has to go somewhere.

Where?


Its radiated, less losses.

If you are designing a tuner, where would you design it to go?


That would depend upon desired system characteristics.

Thanks in advance

Geoff.


A antenna at resonance does not necessarily match the feeder impedance !
The whole idea of a tuner is to make one end match the other.
Stating a VSWR of unity implies a 50 ohm measurement system, which an
antenna at resonance rarely is.

73's
--
Best Regards:
Baron.