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direction finder

noun, Radio.
1.
a receiver with a loop antenna rotating on a vertical axis, used to ascertain the direction of incoming radio waves.
Origin
1910-1915
1910-15
Related forms
direction finding, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for direction finder
  • If an interference complaint is received, the direction finder can be used to locate an interfering transmitter.
British Dictionary definitions for direction finder

direction finder

noun
1.
a highly directional aerial system that can be used to determine the direction of incoming radio signals, used esp as a navigation aid Abbreviation D/F, DF
Derived Forms
direction finding, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for direction finder

radio receiver and antenna system for determining the direction of the source of a radio signal. A direction finder (DF) can be used by an aircraft or ship as a navigational aid. This is accomplished by measuring the direction (bearing) of at least two transmitters whose locations are already known. When the measured directions from each transmitter are plotted on a map, the intersection of the two plotted lines gives the location of the aircraft or ship carrying the DF. This technique, using the directions to two or more transmitters of known location, is called triangulation.

Learn more about direction finder with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Difficulty index for direction finder

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Word Value for direction

12
14
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