Patent attributes
An antenna device includes a first plate conductor that is disposed approximately in parallel to the GND conductor plate, of which one end is connected to the GND conductor plate, and the other end that is opposed to the one end is opened, and a second plate conductor that has approximately the same shape as that of the first plate conductor, of which one end is grounded to the GND conductor plate, of which the other end that is opposed to the one end is opened, that is disposed at a position obtained by rotating the first plate conductor approximately 180 degrees about an intersection line passing through an approximately central point of the GND conductor plate as an axis on the same plane as the first plate conductor on the GND conductor plate, and that has a ground portion at which the grounding is performed and an open portion at which the opening is performed at positions obtained by rotating the ground portion and the open portion of the first plate conductor approximately 180 degrees about the axis.
