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The antenna is the faint rectangle of wires held in tension by the bent X-shaped support frame. The Moxon antenna or Moxon rectangle is a simple and mechanically rugged two-element parasitic array, single-frequency antenna. [1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon [2] ( call sign G6XN).
A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves. The most common form is shaped like a dish and is popularly called a dish antenna or parabolic dish. The main advantage of a parabolic antenna is that it has high directivity.
Butler matrix. A Butler matrix is a beamforming network used to feed a phased array of antenna elements. Its purpose is to control the direction of a beam, or beams, of radio transmission. It consists of an matrix ( some power of two) with hybrid couplers and fixed-value phase shifters at the junctions. The device has input ports (the beam ...
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The top shows the directive pattern of a horn antenna, the bottom shows the omnidirectional pattern of a simple vertical dipole antenna. In the field of antenna design the term radiation pattern (or antenna pattern or far-field pattern) refers to the directional (angular) dependence of the strength of the radio waves from the antenna or other ...
A Yagi–Uda antenna, or simply Yagi antenna, is a directional antenna consisting of two or more parallel resonant antenna elements in an end-fire array; [1] these elements are most often metal rods (or discs) acting as half-wave dipoles. [2] Yagi–Uda antennas consist of a single driven element connected to a radio transmitter or receiver (or ...
The J-pole antenna, more properly known as the J antenna,[1]is a vertical omnidirectionaltransmitting antennaused in the shortwave frequency bands. It was invented by Hans Beggerow in 1909 for use in Zeppelinairships.[2] Trailed behind the airship, it consisted of a single one half wavelengthlong wire radiator, in series with a quarter-wave ...
Biconical antenna. In radio systems, a biconical antenna is a broad- bandwidth antenna made of two roughly conical conductive objects, nearly touching at their points. [1] Biconical antennas are broadband dipole antennas, typically exhibiting a bandwidth of three octaves or more. A common subtype is the bowtie antenna, essentially a flattened ...