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The length of a whip antenna is determined by the wavelength of the radio waves it is used with. Their length varies from compact electrically short antennas 1 / 10 wavelength long, up to 5 / 8 wavelength to improve directivity. The most common type is the quarter-wave whip, which is approximately 1 / 4 wavelength long.
Common types of low-gain omnidirectional antennas are the whip antenna, "Rubber Ducky" antenna, ground plane antenna, vertically oriented dipole antenna, discone antenna, mast radiator, horizontal loop antenna (sometimes known colloquially as a 'circular aerial' because of the shape) and the halo antenna.
A whip antenna with several rods extending horizontally from base of the whip in a star-shaped pattern, similar to an upside-down radiate crown, that form the artificial, elevated ground plane that gives the antenna its name. The ground plane rods attach to the ground wire of the feedline, the other wire feeds the whip.
The rubber ducky antenna (or rubber duck aerial) is an electrically short monopole antenna, invented by Richard B. Johnson, that functions somewhat like a base-loaded whip antenna. It consists of a springy wire in the shape of a narrow helix , sealed in a rubber or plastic jacket to protect the antenna. [ 1 ]
VRCU allows full control of both single and dual RT-1523 (models E, F, and G) and RT-1702 (models E and F) radios from any location within a vehicle. [ 9 ] Single ASIP Radio Mount (SARM) is the latest vehicle installation mount developed specifically for RT-1523 or RT-1702 radios.
Fire tornadoes were spotted as the Palisades fire blazed through the San Fernando Valley in California on 10 January 2025. Winds peaked at over 70mph (112km/h) in a few spots on Friday however the ...
California's Advanced Clean Fleets rule aimed to set timelines for operators of trucks carrying everything from U.S. mail and UPS packages to 40-foot containers of goods and other cargo, to switch ...
For a monopole antenna (a), the Earth acts as a ground plane to reflect radio waves directed downwards, making them seem to come from a virtual "image antenna" (b).In Telecommunications, a ground plane is a flat or nearly flat horizontal conducting surface that serves as part of an antenna, to reflect the radio waves from the other antenna elements.