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{{about|the antenna systems based on the WWII German device|the Lübeck burgomaster|Jürgen Wullenwever}}
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[[File:NSGA Galeta Island Site.jpg|thumb|Direction-finding system [[Galeta Island (Panama)|Galeta Island]], [[Panama]] ]]
A '''Wullenweber''' {{note|the original name introduced by Dr. Hans Rindfleisch was Wullenwe'''v'''er}} is a type of '''Circularly Disposed Antenna Array (CDAA)''' sometimes referred to as a '''Circularly Disposed Dipole Array (CDDA)'''. It is a large circular [[antenna (radio)|antenna]] array used for [[radio direction finding]]. They are used by military and government agencies to [[Triangulation|triangulate]] radio signals for radio navigation, intelligence gathering, search and rescue, and enforcement of broadcasting laws. Because their huge circular reflecting screens looks like circular fences, some antennas have been colloquially referred to as "''elephant cages''". The term ''wullenwever'' was the World War II German [[Code name|cover term]] used to identify their secret CDAA research and development program; its name is unrelated to any person involved in the program.
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Wullenweber technology was developed by the German navy communication research command, Nachrichtenmittelversuchskommando (NVK) and [[Telefunken]] during the early years of [[World War II]]. The inventor was NVK group leader Dr. Hans Rindfleisch, who worked after the war as a Technical Director for the northern Germany official broadcast ([[Norddeutscher Rundfunk|Norddeutscher Rundfunk (NDR)]]). Technical team leaders were Dr. Joachim Pietzner, Dr. Hans Schellhoss, and Dr. Maximilian Wächtler. The last was a founder of Plath GmbH in 1954 and later a consultant to both Plath and Telefunken.
The first Wullenwever was built during the war at Skibsby, north-east of the city of [[Hjørring]] (in German: Hjörring), Denmark ({{coord|57|28|39|N|10|20|04|E}}). It used 40 vertical radiator elements, placed on the arc of a circle with a diameter of {{convert|120|m}}. In an inner circle, 40 reflecting elements were placed behind the radiator elements, suspended from a structure of circular wooden support poles with a diameter of 112.5 meters. To more easily obtain true geographic bearings, the north and south elements were placed exactly on the
===Post-war development===
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