| <p>I found this datasheet on bicone antennas, that is a useful reference for seeing the relationship between bicone dimensions and bandwidth. From these it looks like the lower end of the band is at about f_low=c/(4*L_E), where L_E is the entire length of the antenna (twice the length of one cone), although we'd expect the peak gain to be where a quarter wavelength is just one of the cones (and the figure may roughly support that).</p>
<p>The attached file comes from this website:</p>
<p>https://www.ramayes.com/Biconical_Antennas.htm</p>
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