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: