Patent ID: 7724200
Filing Date: 2010-05-25
Classification: H01Q

Abstract:
1. An antenna device comprising: A dielectric substrate having a first surface and a second surface opposite the first surface; a feeder electrode extending linearly in a first direction on the first surface of the dielectric substrate; a balanced electrode connected to the feeder electrode and extending in a second direction that crosses the first direction at a predetermined angle, the balanced electrode including a pair of electrodes separated by an interval of an odd multiple of ½ of a wavelength of a transmission/reception signal; a respective radiation electrode connected to each electrode of the pair of electrodes of the balanced electrode, the respective radiation electrodes extending in opposite directions to each other along the first direction; a waveguide electrode located at a position separated from the radiation electrodes and on a side of the radiation electrodes opposite to the balanced electrode, the waveguide electrode extending substantially in parallel to the radiation electrode.