Detection of Metallic and Electronic Radar Targets by Acoustic Modulation of Electromagnetic Waves
Technical Report,26 Jun 2017,11 Aug 2017
US Army Research Laboratory 2800 Powder Mill Road United States
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Acoustic-electromagnetic EM interaction is evaluated for metallic and electronic target detection. The transmitter consists of a radar-wave generator emitting a single EM frequency and an acoustic-wave generator emitting a single acoustic frequency. The EM wave and the acoustic wave interact at the target. The target reradiates a new EM wave, which consists of the original EM wave modulated by the acoustic wave. This reradiated wave is captured by the radars receive antenna. The presence of measurable EM energy at any discrete multiple of the audio frequency away from the original radio-frequency RF carrier indicates target detection. Proof-of-concept detection is demonstrated for purely metallic and RF electronic targets within the near field of an ultra-wideband radar antenna operating in the ultra-high frequency band.
- Active and Passive Radar Detection and Equipment