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Van Atta array
Passive retrodirective phased array antenna From Wikipedia, the free encyclopedia
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A Van Atta array is a type of passive retrodirective phased array antenna which redirects (rather than reflects) a signal back in the direction from which it came. It was first described by L. C. van Atta in his 1959 patent.[1]
The signal can be modulated by the redirecting host for purposes such as radio-frequency identification and traffic control (radar target echo enhancement).[2]
A 2023 paper describes the extension of the van Atta antenna principle to underwater acoustic communication.[3]
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