| 摘要 |
PURPOSE:To extract an excellent reception signal by integrating each product between a detected interference frequency with a maximum level and a difference/sum/addition signal between reception antennas so as to use the result as the phase and amplitude information. CONSTITUTION:A difference signal DELTA between reception antennas 11, 12 outputted from a variable phase shifter 17 and the interference frequency signal with a maximum level outputted from a interference frequency detection circuit 19 are synchronized by a quasi-synchronizing circuit 20 to form a digital data. A quasi-synchronizing circuit 21 synchronizes a sum signal SIGMA of the antennas 11, 12 via a pi/2 phase shifter with an output of the circuit 19 to form a digital data. The output of the circuits 20, 21 is inputted to an integration device 26 via a multiplier 24 and its DC component data is inputted to a phase shifter 17 as a phase control signal. Further, the signal SIGMA+DELTA outputted from an adder circuit 15 is synchronized with the output of the quasi-synchronizing circuit 19, its digital data is inputted to a multiplier 25 and the integration device 26 together with the output of the circuit 21, and the DC component data output is inputted to a variable amplifier as a control signal.
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