The discone antenna is a further development of the
ground-plane antenna in which a circular disc is substituted for
the monopole, so that the antenna has a broadband response.
The disc and the cone of the discone antenna
do not have to be of solid construction and may
be constructed from separate wires to reduce weight and wind
loading. The discone antenna has a low voltage standing
wave ratio (VSWR) and the coaxial feeder usually has an
impedance of about 50 Ohm.