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#20
June 17th 08, 12:08 AM
posted to rec.radio.amateur.antenna
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Efficiency and maximum power transfer
Cecil Moore wrote: wrote: R is by definition a physical "property of conductors which depends on dimensions, material, and temperature". That's only one definition. From "The IEEE Dictionary", the above is definition (A). Definition (B) is simply "the real part of impedance" with the following Note: "Definitions (A) and (B) are not equivalent but are supplementary. In any case where confusion may arise, specify definition being used." Definition (B) covers Walt's non-dissipative resistance. A common example is the characteristic impedance of transmission line. In an ideal matched system V^2/Z0, I^2*Z0, or V*I is the power being transferred under non-dissipative conditions. Yes. I agree with that, Cecil. But that's not the claim to which I responded. 73, ac6xg |
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