Hitachi Cable, Inc.

Hitachi Metals, Ltd.

Hisashi Tate

Takahiro Sugiyama

Morihiko Ikegaya

Yukio Ikeda

Kazufumi Suenaga

Katsuya Akimoto

Naoki Futakuchi

Naofumi Chiwata

Ken Okuyama

Yuju Endo

Kazuhisa Takahashi

Takahiro Futatsumori

Shinya Hayashi

Shinichiro Suzuki

Setsuo Andoh

Setsuo Ando

Provided is a differential signal transmission cable, a multi-core cable, and a method of manufacturing a differential signal transmission cable that can suppress an increase in differential-to-common mode conversion quantity. The differential signal transmission cable includes two signal lines, an insulation layer covering a periphery of the two signal lines, and a plating layer covering the insulation layer. Differential-to-common mode conversion quantity of the differential signal transmission cable has a maximum value of &#x2212;26 dB or less, in a frequency band of 50 GHz or less. In the method of manufacturing a differential signal transmission cable, dry ice blasting is performed on an outer peripheral surface of the insulation layer, and then corona discharge exposure is performed on the outer peripheral surface.

Differential signal transmission cable, multi-core cable, and manufacturing method of differential signal transmission cable

A crimping terminal includes a crimping part that is compressed to a conductive part of an electric wire, and a buffer layer formed on a surface where the crimping part contacts the conductive part. The buffer layer includes a resin, a plating or a grease and a conductive microscopic particle that is mixed and dispersed therein. The microscopic particle includes a fractal structure including a fine protrusion on a surface of the microscopic particle.

Crimping terminal and electric wire with crimping terminal

An electric current sensor includes a plurality of bus bars arranged in parallel, a plurality of magnetic detection elements that are adapted to detect a strength of a magnetic field generated by an electric current flowing through the bus bars and to output a voltage according to the strength of the magnetic field detected, and an arithmetic operation part to arithmetically operate an electric current flowing through the bus bars based on the voltage output from the plurality of magnetic detection elements. The arithmetic operation part includes a magnetic flux density arithmetic operation part to arithmetically operate a magnetic flux density based on the voltage, and an electric current arithmetic operation part to arithmetically operate an electric current Ito Iflowing through each of the bus bars based on formula (1) below, Bto Bare a magnetic flux density and Ito Iare an electric current.

Electric current sensor

A current detection structure includes a plurality of busbars arranged in parallel, and a plurality of magnetic detection elements each provided for corresponding one of the plurality of busbars so as to measure a strength of a magnetic field generated by a current flowing through the corresponding busbar. The plurality of magnetic detection elements are mounted on a single circuit board.

Current detection structure

A method of making a flat-plate antenna having thinner shape and excellent productivity, reducing labor for installation in an electrical apparatus or on a wall, and exhibiting desired antenna characteristics stably. The method includes forming a conductive flat-plate having a slit portion, a radiating element portion, and a ground portion formed by press punching a lead-frame. The method also includes laminating over the lead-frame with a resinous film. The method further includes forming first and second connecting holes through which a part of the lead-frame is exposed. The method also includes press punching the laminated lead-frame including the slit portion, the radiating element portion and the ground portion. The method still further includes connecting first and second conductors of a power supply line with the radiating element portion and the ground portion, respectively.

Method for making flat antenna

A flat-plate antenna includes a conductive flat-plate, a slit portion formed through the conductive flat-plate with width proportional to frequency band width, a radiating element portion disposed one side of the slit portion, a ground portion disposed other side of the slit portion, and a power supply line having a first conductor connected to the radiating element and a second conductor connected to the ground portion.

Flat-plate antenna and method for manufacturing the same

A plate antenna has a slot formed by incising a conductive plate. A first radiating conductor and a second radiating conductor are formed with a center axis in the length direction of the slot as a border. Power is supplied through opposing two conductive edges which form the slot. The conductive plate is not provided with a dielectric substrate.

Plate antenna and electric appliance therewith

A slotis defined by notching a conductor plate, a first radiation conductorand a second radiation conductorare disposed by sandwiching the slotas a boundary, a third radiation conductorconnected to either of the first radiation conductoror the second radiation conductoris provided in the slot, if necessary, on and after third radiation conductors, for example, a fourth and fifth radiation conductors connected to either of the first radiation conductoror the second radiation conductorare provided, a power is supplied in the slot by the use of conductor edges of at least two radiation conductors, if required, whereby two monopole antennas and slot antennas, which use respective electric currents on the first radiation conductorand the second radiation conductor, are electrically formed, besides, antennas other than that described above are electrically formed by utilizing electric currents over on and after the third radiation conductors.

Plate-like multiple antenna and electrical equipment provided therewith

Provided are a low-cost and high-performance antenna that can be placed in a small space inside a portable terminal or an electric appliance or housed in a wall or the like, and an electric apparatus having the antenna. A slit having a specified width and a specified length is formed in a conductive flat plate having a specified width and a specified length. A radiating element portion shaped like a monopole antenna and a ground portion (having a specified width) are formed with the slit between them. The width of the conductive flat plate (the length of the radiating element portion) is substantially a multiple of a quarter of a wavelength attained at the operating frequency of the antenna by an odd-numbered value.

Growing community of inventors

Tokyo, Japan

Hisashi Tate