The Furukawa Electric Co., Ltd.

Hiroyuki Tamaoka

Hideaki Hasegawa

Takeshi Yagi

Shinichi Arai

Masahiro Kusunoki

Yoichi Iso

Mitsuru Masuda

Takashi Fujihata

An in vivo pressure measurement device includes: a light source configured to output test light; an optical fiber, to which the test light is input, at least partially including a sensor optical fiber configured to transmit the test light with a loss of 0.3 dB/m or more; and a light receiving unit configured to receive the test light transmitted through the sensor optical fiber. The in vivo pressure measurement device is configured to measure pressure in a living body acting on the sensor optical fiber based on intensity of the test light received at the light receiving unit.

In vivo pressure measurement device

A pressure sensor includes: a light source that outputs signal light; a sensor optical fiber where the signal light is input and the signal light is propagated with a loss of 0.3 dB/m or more; and an optical receiver that receives the signal light propagated through the sensor optical fiber. Further, pressure applied to the sensor optical fiber is detected on a basis of intensity of the signal light received by the optical receiver.

Pressure sensor

A wireless power transmission system that transmits alternating-current power includes a power-transmitting device including first and second electrodes spaced apart and having a total width of &#x3bb;/2&#x3c0; or less, i.e., a near field range, and a first inductor between the first and second electrodes and a AC power-generating section, and a power-receiving device including third and fourth electrodes spaced apart and having a total width of &#x3bb;/2&#x3c0; or less, and a second inductor between the third and fourth electrodes and a load. A coupler including the first and second electrodes and the first inductor forms one resonant circuit and a coupler including the third and fourth electrodes and the second inductor forms another resonant circuit. Resonance frequencies of the couplers are substantially equal. The first and second electrodes and the third and fourth electrodes are spaced apart by &#x3bb;/2&#x3c0; or less.

Wireless power transmission system for transmitting power between a power transmitting device and a power receiving device

The multi-band antennais provided with a dielectric having the three-layer structure obtained by stacking layers so as that a central dielectric layermade of a low dielectric constant material is sandwiched by lower and upper side dielectric layersmade of high dielectric constant materials, a fed elementformed between the central dielectric layerand the upper dielectric layerand its base end being connected to a feed point on a specified side face of the dielectric having the three-layer structure, a grounded parasitic elementformed between the central dielectric layerand the lower dielectric layerand its base end being grounded on a specified side face, wherein the fed elementand the grounded parasitic elementis formed from the base end to the open end by a element obtained by connecting a plurality of line conductors and folding at least around the side face opposite to the specified face.

Compact antenna

A small antenna comprising: an antenna pattern consisting of: two linear conductor elements; a shorting element that electrically connects the two linear conductor elements and a dielectric in a predetermined shape that contains the antenna pattern therein; where the two linear conductor elements are arranged in parallel with each other, and one of the two linear conductor elements is used as a fed line element, while the other is used as a grounded line element.

Growing community of inventors

Tokyo, Japan

Hiroyuki Tamaoka