[[File:NSGA Galeta Island Site.jpg|thumb|Direction-finding system [[Galeta Island (Panama)|Galeta Island]], [[Panama]] ]]
A '''circularly disposed antenna array''' ('''CDAA'''), sometimes referred to as a '''circularly disposed dipole array''' ('''CDDA)''') or a '''''wullenweber''''',<ref>the original name introduced by Dr. Hans Rindfleisch was Wullenwe'''v'''er</ref> 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 look 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.
Many such CDAA systems are used by many nations, such as the former [[Soviet Union]] and modern-day [[Russia]], [[Germany]], the [[United Kingdom]], and the [[United States]].
