I read in sci.electronics.design that Cecil Moore
wrote (in ) about '1/4 vs 1/2 wavelength antenna',
on Sat, 26 Feb 2005:
Rich Grise wrote:
And another thing - in a transmitter, the impedance matching only happens
at the one frequency, which is a lot different scenario from, say, a
stereo. This could be a confusion factor here.

Therefore, the key to converting the non-linear source to
an equivalent linear source lies in a Fourier analysis?
Do the other-than-fundamental terms in the Fourier analysis
encounter a low impedance or a high impedance?

Yes. Not facetious; the impedance matching network can be configured to
minimise individual or a few harmonic emissions by adjusting its
impedances at harmonic frequencies. Either high or low (or perhaps both)
can minimise the emission, depending on the configuration.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

John Woodgate wrote:
Cecil Moore wrote:
Therefore, the key to converting the non-linear source to
an equivalent linear source lies in a Fourier analysis?
Do the other-than-fundamental terms in the Fourier analysis
encounter a low impedance or a high impedance?

Yes. Not facetious; the impedance matching network can be configured to
minimise individual or a few harmonic emissions by adjusting its
impedances at harmonic frequencies. Either high or low (or perhaps both)
can minimise the emission, depending on the configuration.

Whether the harmonic impedance is high or low would affect
the efficiency, no?
--
73, Cecil http://www.qsl.net/w5dxp


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I read in sci.electronics.design that Cecil Moore
wrote (in ) about '1/4 vs 1/2 wavelength
antenna', on Sat, 26 Feb 2005:
John Woodgate wrote:
Cecil Moore wrote:
Therefore, the key to converting the non-linear source to
an equivalent linear source lies in a Fourier analysis?
Do the other-than-fundamental terms in the Fourier analysis
encounter a low impedance or a high impedance?

Yes. Not facetious; the impedance matching network can be configured to
minimise individual or a few harmonic emissions by adjusting its
impedances at harmonic frequencies. Either high or low (or perhaps both)
can minimise the emission, depending on the configuration.

Whether the harmonic impedance is high or low would affect
the efficiency, no?

I think the question can only be answered by 'It depends..'. For
example, it is 'affected' if it's changed by 1%, but is that
significant?
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk