Anyone else remember the great Fractenna flap here? I see they went comme rcial but haven't really dominated the cellphone market as they projected.
Then there was the Orbital-Angular-Momentum thing.
Now we have "liquid metal" antennas:
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The hook is that the length of the (vertical only so far, as far as I can tell) column is variable per an applied control voltage.
They claim a tuning range of 5.2:1 (0.66 GHz to 3.4?GHz) but I'm going to go out on a limb and guess that it's too slow for FM.
Mark L. Fergerson