| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna beam control system which has a simple configuration, can be manufactured inexpensively, and can be turned suitably into an IC. SOLUTION: This antenna beam control system is constituted, in such a way that first signal processing circuits are respectively connected to at least four antenna elements, and phase shifting circuits are respectively connected to the signal processing circuits. The output signals of the phase shifting circuits are synthesized by means of a synthesizing circuit, and the synthesized signal is processed by means of a second signal processing circuit. In addition, the phase shifting amounts of the phase shifting circuits are controlled, based on the information on the intensity of the signal processed by means of the second signal processing circuit, so that the intensity of the signal processed by means of the second signal processing circuit becomes optimum. The phase shift amounts of the phase shifting circuits are switched between 0 deg. and 180 deg., based on the amplitude of an automatic gain control voltage generated by means of the second signal processing circuit.
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