Kyushu University

Fukuoka Industry, Science and Technology Foundation

Haruichi Kanaya

Tetsuo Ikeda

Ryosuke Tsutsumi

Keiji Yoshida

[Problem] To provide a power feed system that supplies electric power via electromagnetic waves to an implant embedded in a deep part of a living body, using a sandwiching method in which a potential difference is generated using a pair of electrodes, by disposing an implant electronic device between a power transmission side electrode and a power reception side electrode. [Solution] It is provided with: a pair of electrodes (a first surface electrodeand a second surface electrode) stuck onto a surface of a living body; an implant electronic devicethat includes a first body internal electrodeand a second body internal electrodeand in which the first body internal electrodeand the second body internal electrodeare fixed to respective positions having different potential differences in the living body; and a high frequency AC power sourcethat applies a high frequency alternating voltage to the first surface electrodeand the second surface electrode

Power feed system

A communication circuit is provided with an antenna section, such as a nonresonant antenna, and a matching section which connects with the antenna section and adjusts impedance, for example. The matching section has a transmission line, and the electric length and characteristic impedance of the transmission line are determined based on the frequency or the frequency band in which the antenna section and the transmission line resonate. For example, since it is not necessary to unite resonance frequency with center frequency if it is a nonresonant antenna, it becomes possible to attain the miniaturization of an antenna. Wide band-ization is realizable by changing the characteristic impedance of the transmission line.

Growing community of inventors

Fukuoka, Japan

Haruichi Kanaya