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

Hello all,

     Quality factor Q, reactive energy and resonant frequency are also very
interesting in the antennas and scattering system. They are related to the
characteristics of the system bandwidth, gain, and RCS,e tc.
At resonance, the super-directivity can take place in the antennas system.
But, as Miron said, we don't know where the "near field" leaves off, so it is
difficult to determine the reactive energy of a complex open system. In other
words, it is difficult to determine the resonant conditions in the open
system. Any ideas please ?

Long Li

-- 
The NEC-List mailing list <nec-list_at_gweep.ca>
http://www.gweep.ca/mailman/listinfo.cgi/nec-list