Kabushiki Kaisha Tokai Rika Denki Seisakusho

Kabushiki Kaisha Tokai Rika Denki

Koji Inafune

Kenichi Koga

Satoshi Mori

Tatsuya Koike

There is provided an antenna that transmits and receives a wireless signal compliant with a designated communication standard, the antenna comprising: a metal plate that is disposed on a circuit board; a first supporting section that supports the metal plate and connects the metal plate to a feed point formed on the circuit board; at least one second supporting section that supports the metal plate and connects the metal plate to a ground plane formed on the circuit board; and a plurality of extension sections that extend from an outer edge of the metal plate toward a direction of the circuit board but have no contact with the circuit board; wherein the plurality of extension sections operate as perturbation elements that form two excitation modes, the two excitation modes spatially intersecting with one other.

Antenna

There is provided a metal plate antenna transmitting and receiving wireless signals conforming to a prescribed communication standard, wherein an antenna width is designed to satisfy radiation resistance achieving a prescribed standing wave ratio in a resonant mode in which a loop length of the metal plate antenna is 1.5 wavelength of a wireless signal conforming to the prescribed communication standard.

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Aichi, Japan

Koji Inafune