This is using resonance as a choke, not resonance of the entire antenna.
You want your choke to be high Z, so that currents don't flow on the outside of the coax.
As far as the antenna goes, if you can drive it or couple power to/from it, whether it's resonant or not makes no difference on the performance. (aside from any other length related issues - short antennas have a different pattern than full size antenna, but their "efficiency" isn't intrinsically different).
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-----Original Message-----
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Sent: Mar 4, 2024 9:54 AM
To: <
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Subject: Re: [nanovna-users] where is the end fed natural resonance
But then ARRL Antenna book says resonance has no affect on antenna performance. Hams like to operate antennas at or near resonance as that’s where drive point impedance is at its lowest value so it’s easier to match,
Ray
