Sony Corporation

Ichikoh Industries, Ltd.

Harada Industry Co., Ltd.

Noriyuki Mukai

Takeshi Maeda

Koichi Ito

Yoshihiro Kato

Kotoka Inoue

Masaya Takano

Katsuhiro Murahashi

Hiroto Tokunaga

Seigo Fukunaga

This specification discloses an excellent communication device of a field coupling type that increases field coupling efficiency between electrodes and realizes a small-sized device. This specification also discloses a communication system and an electrode. A communication deviceincludes: a first resonant circuitconnected in series to an electrode unitformed with two conductor plates; and a second resonant circuitconnected in parallel to the electrode unitand the first resonant circuit, which are connected in series. The constant of a resonant circuit is determined so that the voltage Vto be applied to the electrode unitbecomes higher than the voltage Vto be applied to the electrode unitand the first resonant circuitconnected in series. In this manner, a field coupling electrode that has a very high coupling strength at a target frequency is obtained.

Field coupling electrode, communication device, and communication system

Growing community of inventors

Tokyo, Japan

Noriyuki Mukai