| 摘要 |
A circularly polarized wave antenna device contains a dielectric substrate provided on a ground conductor 1 , a electrodes provided on the dielectric substrate to face the ground conductor. The electrodes form capacitors together with the ground conductor. A radiating conductor plate is made of a metal plate. Leg pieces are bent toward the dielectric substrate side at a plurality of locations on the radiating conductor plate. Two electric lengths on the radiating conductor plate that are generated in the directions passing the center of the radiating conductor plate and orthogonal to each other are equal to each other. Areas of the electrodes to which two leg pieces provided on a first line S 3 are connected are different from those of the electrodes to which two leg pieces provided on a second line S 4 are connected.
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