P.S.

Both linear, and helical normal-mode monopoles of ~6 degrees physical
aperture (and less) can be made resonant at the operating frequency via a
suitable inductance placed either in the monopole itself, or at its
feedpoint.

But resonance so achieved does NOT mean that such monopole radiators will
have a very useful amount of radiation resistance, or that such a resonant
condition equates to the performance of a radiator that is resonant without
the need for such an additional inductance.

This reality appears to have been overlooked in some of the earlier posts in
this thread.