Distributed capacitance effects inductor Q?

Does anyone know why the distributed winding capacitance of a loop
antenna, or any inductor, degrades the efficiency?

It would seem that a loop antenna with 100pF of winding capacitance in
parallel with a external capacitor of 200pF would resonate at the
same frequency as a antenna with no winding capacitance and a external
capacitor of 300pF, and perform just as well, but apparently that's
not the case.

The best explanation I got was that winding capacitance represents
'Low Q' and a external tuning capacitor represents 'High Q'

What is the difference between high and low Q, and why should a loop
antenna with no winding capacitance perform any better than one with
50% of the total capacitance in the windings? Where is the energy
loss?

Thanks,

-Bill

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Relevant Pages

  • Distributed capacitance effects Q?
    ... Does anyone know why the distributed winding capacitance of a loop ... antenna, or any inductor, degrades the efficiency? ...
    (rec.radio.amateur.antenna)
  • Re: Distributed capacitance effects Q?
    ... same frequency as a antenna with no winding capacitance and a external ... What is the difference between high and low Q, and why should a loop ... I assume that you mean radiation efficiency (ratio between actual ...
    (rec.radio.amateur.antenna)