- A radio receiver equipped with a directional sensing antenna used to take bearings on a radio transmitter. Specialized radio direction finders are used in aircraft as air navigation aids. Others are ground based, primarily to obtain a “fix” on a pilot requesting orientation assistance or to locate downed aircraft. UDFs (ultrahigh frequency direction finders) receive signals in the ultrahigh frequency radio broadcast band; VDFs in the very high frequency band; and UVDFs (UHD/VHD direction finder) in both bands. See automatic direction finder.
Aviation dictionary. 2014.
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direction finder — direction finding. Radio. a receiver with a loop antenna rotating on a vertical axis, used to ascertain the direction of incoming radio waves. [1910 15] * * * ▪ instrument or radio direction finder radio receiver and antenna system for… … Universalium
direction finder — n. a device for finding out the direction from which radio waves or signals are coming, as a loop antenna that can be rotated freely on a vertical axis … English World dictionary
direction finder — Synonyms and related words: Bourdon tube, Gyropilot, Gyrosin compass, HFDF, Mach meter, RDF, absolute altimeter, accelerometer, aerial reconnaissance camera, aerometer, aeroscope, air log, altigraph, altimeter, ammeter, anemograph, anemometer,… … Moby Thesaurus
direction finder — pelengatorius statusas T sritis fizika atitikmenys: angl. direction finder vok. Peilanlage, f; Peiler, m; Peilgerät, n rus. пеленгатор, m pranc. goniomètre, m … Fizikos terminų žodynas
direction-finder — direcˈtion finder noun A radio receiver that determines the direction of arrival of incoming waves, used esp in navigation • • • Main Entry: ↑direct … Useful english dictionary
direction finder — noun Date: 1913 a radio receiving device for determining the direction of incoming radio waves that typically consists of a coil antenna rotating freely on a vertical axis … New Collegiate Dictionary
direction finder — direc′tion find er n. rtv a receiver with a loop antenna rotating on a vertical axis, used to ascertain the direction of incoming radio waves • Etymology: 1910–15 direc′tion find ing, n … From formal English to slang
direction-finder — /dəˈrɛkʃən faɪndə/ (say duh rekshuhn fuynduh) noun a contrivance on a radio receiver usually based on a loop antenna rotating on a vertical axis, which ascertains the direction of incoming radio waves … Australian English dictionary
direction finder — noun radio; determines the direction of incoming radio waves • Hypernyms: ↑receiver, ↑receiving system • Hyponyms: ↑goniometer, ↑radio compass … Useful english dictionary
direction finder — n. df, apparatus for determining the source of a conveyed signal … English contemporary dictionary