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:
|
|
|
|
If you wish to suggest other words or phrases to extend our glossary, please contact us. Please contact Argos Press to obtain information on licensing our content (such as this entry on Helical Antenna). © Argos Press Pty Ltd, Canberra, 2003-2009. All rights reserved.