Re: NEC-LIST: resonance and Q of an antenna and scattering system

I always thought of antenna Q as the BW where SWR is 2:1 or better, but
thats a ham radio definition. Perhaps the bandwidth where the return
loss is equivalent to 3dB of loss from the feed cable to the antenna
would be better. I think that would be SWR of 5.8:1 Note that if you
include the feedline with an antenna SWR of 5.8:1, you will have much
higher loss due to increased voltage and current in the cable. See the
Amateur Radio Handbook for details. rob

Li Long wrote:
>
> Hello All
>
> It is well known that the relationship of resonance with Q is very compact in the circuit theory. But in the antenna and scattering theory, what is the definition of the resonance of antennas or scatterings? The previous discussionson on Q of small antenna is very interesting. But what is the relationship of resonance with Q of antennas? Now I am doing some work on the resonance of open systems. Any discussion and suggestions are welcomed.
>
> Happy new year!
>
> LI Long
> ----------------------------------------------------------------
> LI Long
> National Key Lab. of Antennas and Microwave Technology
> Xidian University
> P.O.Box 223,
> Xi'an, Shaanxi,710071,
> P.R.China
> Tel: +86-29-8204068
> FAX: +86-29-8201164
> Email: LL_at_mwp.xidian.edu.cn
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