DIRECTIVITY CONTROL ANTENNA

PROBLEM TO BE SOLVED: To provide a directivity control antenna which can induce directivity and reduce the size of an overall antenna. SOLUTION: The directivity control antenna is provided with a circular dielectric substrate 11 and reactance variable circuits 40 (40A, B, C, D). The circular dielectric substrate includes a front surface on which there are provided a power feeding patch 14 that is a radiator, and a plurality of arcuate cavity resonators 15 (15A, B, C, D) concentrically disposed around the power feeding patch 14 and being non-excited elements electromagnetically coupled to the power feeding patch 14. The reactance variable circuits are provided at the rear surface side of the circular dielectric substrate 11 and mounted to each of the plurality of arcuate cavity resonators. COPYRIGHT: (C)2010,JPO&INPIT