HELICAL ANTENNA
Antennas Glossary
Antennas — Helical Antenna
Information on Helical Antenna
A helical antenna is constructed using a helix of
wire that is fed at one end and unconnected at
the other. The bandwidth of an antenna may be increased
by increasing its thickness or surface area. The same result
may be obtained by making a helical antenna. When
the helix circumference is smaller than a wavelength, the radiation
pattern is similar to a dipole. When the circumference of
the helical antenna is increased to above one wavelength,
the axial mode of radiation is increased. The helical antenna is one of the simplest to construct since the
dimensions are not critical. Generally, the antenna consists of a
helix of thick wire or rod, connected to the inner
conductor of a coaxial line, and a ground-plane screen connected
to the braid.
Helical antennas are used mostly as UHF antennas
and SHF antennas.
Other topics in our resources on Antennas related to Helical Antenna include:
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