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Everything about Direction finding

Measurement of the direction from which a received signal was transmitted

Direction finding (DF), radio direction finding (RDF), or radiogoniometry is the use of radio waves to determine the direction to a radio source. The source may be a cooperating radio transmitter or may be an inadvertent source, a naturally occurring radio source, or an illicit or enemy system. Radio direction finding differs from radar in that only the direction is determined by any one receiver; a radar system usually also gives a distance to the object of interest, as well as direction. By triangulation, the location of a radio source can be determined by measuring its direction from two or more locations. Radio direction finding is used in radio navigation for ships and aircraft, to locate emergency transmitters for search and rescue, for tracking wildlife, and to locate illegal or interfering transmitters. During the Second World War, radio direction finding was used by both sides to locate and direct aircraft, surface ships, and submarines. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Direction findingA 5-minute orientation
  2. Skim a recent paper: Spatial Spectrum Direction Finding by Programmable Metasurface With Time ModulationInfluential work since 2022
  3. Pick up a classic book: Transceiver and system design for digital communicationsThe most-reprinted book on the subject
  4. Read the landmark paper: Algorithm 457: finding all cliques of an undirected graphCited 2,049 times
  5. Go sideways: High-frequency direction findingA closely related topic
  6. Go sideways: Radio navigationA closely related topic

đź“– Definitions

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🗂️ The subject at a glance

  1. History
  2. Equipment
  3. Applications
  4. Astronomy
  5. Direction finding at microwave frequencies
  6. DF by amplitude comparison

🏆 Landmark papers (most cited)

🆕 Influential since 2022

đź“š Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

đź”— Related topics