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radio directional beam

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  • Radio navigation — or radionavigation is the application of radio frequencies to determining a position on the Earth. Like radiolocation, it is a type of radiodetermination.RDF / ADF / NDBThe first system of radio navigation was the Radio Direction Finder, or RDF.… …   Wikipedia

  • Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… …   Wikipedia

  • 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

  • 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

  • beam — n. & v. n. 1 a long sturdy piece of squared timber or metal spanning an opening or room, usu. to support the structure above. 2 a a ray or shaft of light. b a directional flow of particles or radiation. 3 a bright look or smile. 4 a a series of… …   Useful english dictionary

  • beam — noun 1》 a long sturdy piece of squared timber or metal used horizontally in building to support a load above.     ↘a narrow horizontal length of squared timber used for balancing exercises in gymnastics. 2》 a horizontal beam supporting the deck… …   English new terms dictionary

  • beam — I. noun Etymology: Middle English beem, from Old English bēam tree, beam; akin to Old High German boum tree Date: before 12th century 1. a. a long piece of heavy often squared timber suitable for use in construction b. a wood or metal cylinder in …   New Collegiate Dictionary

  • Citizens' band radio — Typical 1980s CB base station, used with outdoor antenna. This radio may also be used in an automobile, since it is powered by 13.8V DC. Shown with Astatic Power D 104 desk mic …   Wikipedia

  • Antenna (radio) — Whip antenna on car …   Wikipedia

  • Power dividers and directional couplers — A 10 dB 1.7–2.2 GHz directional coupler. From left to right: input, coupled, isolated (terminated with a load), and transmitted port …   Wikipedia

  • Lorenz beam — The Lorenz beam blind landing system was an air radio navigation system in use from the late 1930s. The name refers to the company that produced the system; Lorenz referred to it simply as the Ultrakurzwellen Landefunkfeuer, German for ultra… …   Wikipedia

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