RECEIVE MODE OF OPTICAL SIGNAL-PROCESSING MULTIBEAM ARRAY ANTENNAS

A receive mode of the optical processing array antennas is presented i n this letter. In this receive mode, the transmitting radio frequency (RF) signals generated by optical processor will be shifted as local o scillator (LO) signals, and the received RF beams will be discriminate d in the downconverted intermediate frequency (IF) frequency domain by a mixer array between optical processor and antenna elements. A proof -of-concept experiment for a two-beam and four-element array antenna i s demonstrated, and the received IF power distributions for each beam have very good agreement with the calculated antenna patterns.