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The discone antenna has a useful frequency range of at least 10 to 1. [2] [3] When employed as a transmitting antenna, a properly constructed discone is just as efficient as an antenna designed for a more limited frequency range. The extra bandwidth comes from the controlled taper and large termination radius of the cone.
Antenna – general introduction to antennas; Antenna types – broad review of specific antenna types; Bicone – a geometric shape similar to one of a truncated biconical antenna's arms; Discone antenna – a halved biconical – easier to construct and erect than a bicone; Double cone – the geometric shape of a biconical antenna
Although the name is similar to the folded unipole, the two antennas are electrically different: The folded monopole is a much simpler antenna. Discone antenna The discone is a monopole version of a biconical antenna. The name of the antenna describes its shape: A metal disk above a metal cone.
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It is the only type of directional antenna that is directional ("beam" antenna) over its entire working range. discone antenna The discone is omnidirectional, vertically polarized, and has a gain similar to a dipole. It is equally efficient as a monopole and is exceptionally wideband, offering a frequency range ratio of up to approximately 10:1 .
A discone is merely a special case of a bicone (or biconic) antenna. The only reason I can find to use a discone (other than "It's the cool antenna all the big boys use!") rather than a biconic is that it requires half the vertical height (but necessarily is a little wider).
Omnidirectional radiation patterns are produced by the simplest practical antennas, monopole and dipole antennas, consisting of one or two straight rod conductors on a common axis. Antenna gain (G) is defined as antenna efficiency (e) multiplied by antenna directivity (D) which is expressed mathematically as: =.
A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner. [2] In order to provide a dynamic response, reconfigurable antennas integrate an inner mechanism (such as RF switches, varactors, mechanical actuators or tunable materials) that enable the intentional redistribution of the RF currents over the ...