directional antenna

directional antenna
Antenna An*ten"na, n.; pl. {Antenn[ae]}. [L. antenna sail-yard; NL., a feeler, horn of an insect.] 1. (Zo["o]l.) A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually four in the latter. They are used as organs of touch, and in some species of Crustacea the cavity of the ear is situated near the basal joint. In insects, they are popularly called horns, and also feelers. The term in also applied to similar organs on the heads of other arthropods and of annelids. [1913 Webster]

2. (Electronics) A metallic device, variously shaped, designed for the purpose of either transmitting or receiving radio waves, as for radio or television broadcasting, or for transmitting communication signals. Some types are: {whip antenna}, {antenna tower}, {horn antenna}, {dish antenna}, {directional antenna} and {rabbit ears}. See {transmitter}, {receiver}. [PJC]


The Collaborative International Dictionary of English. 2000.

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Look at other dictionaries:

  • Directional antenna — Log periodic dipole array A directional antenna or beam antenna is an antenna which radiates greater power in one or more directions allowing for increased performance on transmit and receive and reduced interference from unwanted sources.… …   Wikipedia

  • directional antenna — An antenna or aerial that radiates and receives signals mainly from one direction. For terrestrial radio communications, directionality in an azimuth or a horizontal plane is important. Directional antennae are either monodirectional,… …   Aviation dictionary

  • directional antenna — kryptinė antena statusas T sritis fizika atitikmenys: angl. directional antenna; directional beam aerial; directive antenna vok. Richtantenne, f; Richtstrahlantenne, f; Richtungsantenne, f rus. направленная антенна, f pranc. antenne… …   Fizikos terminų žodynas

  • directional antenna — kryptinė antena statusas T sritis automatika atitikmenys: angl. directional antenna; directive antenna vok. Richtstrahlantenne, f; Richtungsantenne, f rus. направленная антенна, f pranc. antenne directionnelle, f …   Automatikos terminų žodynas

  • directional antenna — noun an antenna that transmits or receives signals only in a narrow angle • Hypernyms: ↑antenna, ↑aerial, ↑transmitting aerial • Hyponyms: ↑array, ↑dish, ↑dish aerial, ↑dish antenna, ↑ …   Useful english dictionary

  • non-directional antenna — įvairiakryptė antena statusas T sritis fizika atitikmenys: angl. non directional antenna; nondirective antenna; omnidirectional antenna vok. rundstrahlende Antenne, f; ungerichtete Antenne, f rus. ненаправленная антенна, f pranc. antenne… …   Fizikos terminų žodynas

  • end-on directional antenna — ašinio spinduliavimo antena statusas T sritis radioelektronika atitikmenys: angl. end fire antenna; end on directional antenna vok. Längsstrahler, m; Längsstrahlungsantenne, f rus. антенна осевого излучения, f; антенна продольного излучения, f… …   Radioelektronikos terminų žodynas

  • Antenna — An*ten na, n.; pl. {Antenn[ae]}. [L. antenna sail yard; NL., a feeler, horn of an insect.] 1. (Zo[ o]l.) A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually four in… …   The Collaborative International Dictionary of English

  • antenna tower — Antenna An*ten na, n.; pl. {Antenn[ae]}. [L. antenna sail yard; NL., a feeler, horn of an insect.] 1. (Zo[ o]l.) A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually… …   The Collaborative International Dictionary of English

  • directional — adj. 1. of or pertaining to direction (definition 2). [WordNet 1.5] 2. serving to indicate direction. [PJC] 3. (Radio) transmitting radio signals in a specific direction, or receiving signals only from a narrow angle of directions, thus serving… …   The Collaborative International Dictionary of English

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