RE: NEC-LIST: RE: NEC-LIST:Simulations of Q and the Chiu-Harrington Limit

A correction to one of my previous posts.

> -----Original Message-----
> From: nec-list-admin_at_gweep.ca
> [mailto:nec-list-admin_at_gweep.ca] On Behalf Of Steven Best
> Sent: Saturday, November 30, 2002 12:59 PM
> To: Fractenna_at_aol.com; nec-list_at_gweep.ca
> Subject: NEC-LIST: RE: NEC-LIST:Simulations of Q and the
> Chiu-Harrington Limit
>
>

Please ignore the following statements made regarding Q and
anti-resonance. I'm not even sure what I was thinking. Too many things
going on at once.

>
> The only place to be cautious is at frequencies near an
> anti-resonance (parallel resonance - dX/dw is negative).
> Near an anti-resonance, the Q of the antenna may approach
> zero. For this reason, Q cannot be approximated from 1/BW
> (BW being the 1/2 power or conductance bandwidth) or from the
> reactance formula: Q = (w/2R) (dX/dw + |X|/w). Additionally,
> in the anti-resonance regions, you should cautious as to how
> you interpret the relationship between Q and the fundamental limit.
>

Sorry,

Steve

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