| 摘要 |
PURPOSE:To stably remove an interference wave by providing a signal processor which analyzes the direction and level of an arrival interference wave and generates a weight signal to be supplied to the output stage of each element antenna, and also setting the amplitude component of the weight signal by a variable attenuator connected to the element antenna and the phase component of the weight signal by a phase shifter. CONSTITUTION:The signal processor 4 performs control so that the amplitude components of weight W supplied to the output stages of respective antenna elements 1a-1n are adjusted by variable attenuators 11a-11n and phase components are adjusted by phase shifters 10a-10n, thereby removing an interference wave. Namely, know weight Wq supplied to the output stages of the respective element antennas 1a-1n in case of disturbance due to the interference wave and the outputs Xa-Xn of the respective element antennas 1a-1n and the output SIGMA of a signal adder in case of disturbance due to the interference wave are compared to find the weight W by the signal processor 4. Then, the variable attenuator 11a-11n and phase shifters 10a-10n are controlled. A radiation pattern having a zero point in the direction thetaj of the interference wave where there is no disturbance due to the interference wave is obtained stably by this method.
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