A horn antenna couples energy between free space
and a waveguide. An important function of the horn antenna is impedance matching.
A horn antenna is
often used as a microwave antenna.
Horn antennas are usually optimised
to work in a particular band. For example, in a
satellite antenna, a horn antenna is often placed
at the focus of a parabolic antenna. A different horn
antenna would usually be used in each of
the X band, C band, Ku band and Ka band.
Other topics in our resources on Antennas related to Horn Antenna include: