plate antenna

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• Plate detector (radio) — A plate detector is a vacuum tube detector circuit used in A.M. radios. This circuit employs a tube with an indirectly heated cathode, typically a medium mu triode, or a tetrode or pentode with a sharp cut off control grid. Rectification of R.F.… …   Wikipedia

• Crossed field antenna — A crossed field antenna, or CFA, is a type of antenna for long and mediumwave broadcasting, patented in 1986, which was claimed to have the same efficiency as a conventional antenna but only one tenth the overall height. The invention was… …   Wikipedia

• Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …   Wikipedia

• Whip antenna — on car A whip antenna is an antenna consisting of a single straight flexible wire or rod, often mounted above some type of conducting surface called a ground plane.[1] The bottom end of the whip is connected to the radio receiver or transmitter.… …   Wikipedia

• Slot antenna — A slot antenna consists of a metal surface, usually a flat plate, with a hole or slot cut out. When the plate is driven as an antenna by a driving frequency, the slot radiates electromagnetic waves in similar way to a dipole antenna. The shape… …   Wikipedia

• Image antenna — In telecommunication, an image antenna is a theoretical mirror image of an antenna, an antenna element considered to extend below the ground plane as the actual antenna is above the ground plane. Note 1: The image antenna is helpful in… …   Wikipedia

• dish antenna — Dish Dish (d[i^]sh), n. [AS. disc, L. discus dish, disc, quoit, fr. Gr. di skos quoit, fr. dikei^n to throw. Cf. {Dais}, {Desk}, {Disc}, {Discus}.] 1. A vessel, as a platter, a plate, a bowl, used for serving up food at the table. [1913 Webster]… …   The Collaborative International Dictionary of English

• Vivaldi-antenna — A Vivaldi antenna is a co planar broadband antenna, which is made from a on both sides metallized dielectric plate.The feeding line excites a circular space via a microstrip line, terminated with a sector shaped area.From the circular resonant… …   Wikipedia

• genovertical plate — (ARTHROPODA: Insecta) In Diptera, the area on the head above the antenna and next to the compound eye; the orbital plate; the parafrontals …   Dictionary of invertebrate zoology

• telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …   Universalium

• radio — /ray dee oh /, n., pl. radios, adj., v., radioed, radioing. n. 1. wireless telegraphy or telephony: speeches broadcast by radio. 2. an apparatus for receiving or transmitting radio broadcasts. 3. a message transmitted by radio. adj. 4. pertaining …   Universalium