Title: Radar test facility communication system

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Abstract: In a radar test facility, a system for communicating between a radar target enerator which produces complex wideband radar data signals simulating static and dynamic targets and an angle simulation test array which comprises a plurality of infrared to microwave transponders. A single frequency traveling wave laser furnishes an infrared or optical source of radiation in a closed loop external to the laser crystal. A plurality of acousto-optic Bragg defractors are positioned in the path of the closed loop for gating the laser radiation out of the loop. Radio frequency simulations of radar signal reflections from such targets as aircrafts, missles, chaff, land, and the like, modulate the gated radiation in frequency and amplitude. Means are also provided for directing the modulated and gated radiation toward the infrared to microwave transponders. Each simulation is directed in angle so as to illuminate that part of the array from which it is desired to have the simulation appear to originate. Separate communication links are utilized for each dynamic aircraft or missile simulation, while one or a plurality of links may be utilized to communicate static simulations of, for example, land, chaff, rain clouds, and the like.


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