A biconical antenna consists of an arrangement of two conical conductorss, which is driven by potential, charge, or a alternating magnetic field (and the associated alternating electric current) at the vertex. The conductors have a common axis and vertex. The two cones face in opposite directions. Biconical antennas are broadband dipole antennas transcieving signals from 30 MHz to 300 MHz.
A simple conical monopole antenna is a wire approximation of the solid biconical antenna and has increased bandwidth (over a simple monopole). A bowtie antenna is simple broadband wire approximation of a biconical antenna (commonly used for UHF transception).