Patent ID: 6020850
Filing Date: 2000-02-01
Classification: H01Q

Abstract:
An optical control type phased array antenna apparatus comprising:an array antenna comprising a plurality of antenna elements, said array antenna receiving a plurality of radio wave signals from respective predetermined directions and outputting received radio wave signals;optical signal processing means for optically processing input high-frequency signals, and outputting a plurality of optically processed signals, said optically processed signals including signal components having phases corresponding to directions from which the respective radio wave signals arrive and having frequencies equal to those of the input high-frequency signals, said plurality of optically processed signals respectively corresponding to said antenna elements;a plurality of frequency converting means, provided in correspondence with said antenna elements, each of said frequency converting means mixing a received signal received signal outputted from said optical signal processing means in correspondence with said antenna element, and outputting a frequency-converted signal having a frequency of a difference between a frequency of the received signal and a frequency of the optically processed signal; andcombiner means for combining a plurality of frequency-converted signals outputted from said plurality of frequency converting means,wherein, when a plurality of reference signals each having a frequency that differs from the frequency of the corresponding radio wave signal by an intermediate frequency are inputted to said optical signal processing means as said input high-frequency signals, intermediate frequency signals having the intermediate frequencies and corresponding to the radio wave signals are outputted as received signals from said combiner means.