Here's another more common-place example - a 15m 2-el cubical quad.
Minimum VSWR: Freq = 21.03 MHz, Z = 101.1 - j16.64, VSWR = 2.09
Resonance: Freq = 21.13 MHz, zZ= 112.2+j0, VSWR = 2.25
The "anomaly" occurs because the VSWR is being referenced to something
significantly different than the resonant impedance of the antenna; but
that's often the practical situation we find ourselves in.
73,
Steve G3TXQ
> Gerald,
>
> I agree that for most "normal" situations minimum VSWR and resonance are
> coincident. But I have given one example, and there are others, where
> they are not.
>
> The values I quoted were taken from EZNEC VSWR plots, and confirmed in
> the VK1OD on-line calculator.
>
> 73,
> Steve
>
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