[Antennas] Broadbanding an antenna...

[Andy]

I have seen this technique applied to VHF whip antennas, with an L/C
impedance compensating network built into the antenna mount.  I've
forgotten now who the vendor was (they made commercial antennas, not
just for the ham bands).  I think they were able to more or less
double, maybe as much as triple, the usable bandwidth of the antenna
this way.  I haven't done the math myself, but this leads me to
believe that the tracking is rather less than ideal.

They didn't have anything written about the technique in publicly
available articles or sales brochures.  But you could clearly see the
components in their close-up photos.

Andy