Hitachi Metals, Ltd.

Casio Computer Co., Ltd.

Hitachi Ferrite Electronics, Ltd.

Hirokazu Araki

Masahiro Mita

Chiharu Mitsumata

Takashi Sano

Hiroyuki Aoyama

Toshikazu Nishiyama

Soh Kimura

Masaki Nakamura

Narutoshi Minami

Tadashi Kotani

Tomomi Ogawa

Takayuki Ishimoto

Katsuhiro Okada

Yasuo Tani

Osamu Ikemoto

A resonance-type, receiving antenna comprising a circular-ring-shaped, magnetic core constituting a closed magnetic path having one gap, one or more coils wound around the circular-ring-shaped, magnetic core, and a capacitor connected in parallel to both ends of each coil; an angle between a straight line extending from a geographical center of the circular-ring-shaped, magnetic core to a center of the gap and a straight line extending from the geographical center to a center of the coil being in a range of 10&#xb0; to 90&#xb0;.

Resonance-type, receiving antenna and receiving apparatus

A magnetic sensor-type antenna comprising a magnetic core and a coil wound around the magnetic core for receiving electromagnetic waves, which is disposed in a housing such that the end portion of the magnetic core is bent away from the housing or a metal portion of the housing, and a timepiece, a keyless entry system and an RFID system each comprising such an antenna.

Antenna, and radio timepiece using the same, keyless entry system, and RFID system

An antenna comprising a magnetic main-path member comprising a coil wound around a magnetic core, and a magnetic sub-path member magnetically connected to the magnetic core for constituting a substantially closed magnetic path with the magnetic main-path member, the antenna meeting the relation of (S/N)&#x3e;(S/N), wherein (S/N)is a ratio of a signal voltage S obtained from the coil to a noise voltage N in this antenna, and (S/N)is a ratio of a signal voltage S to a noise voltage N in an antenna having the same structure except for having no magnetic sub-path member.

Antenna, and radio-controlled timepiece, keyless entry system and RFID system

An antenna includes an elongate laminated core, a core case having an electrical insulating property and housing the core, and a coil wound around the core between both end portions of the core through the case. The core has a first and second groups, each including thin plates of amorphous soft magnetic alloy laminated with each other, and is configured by stacking the first and second groups one another. Each of the thin plates of the core includes flanges provided at both end portions thereof, and a coil wound portion between the both end portions, and the case includes projections, which push the both end portions of the thin plates of the second group to separate from the both end portions of the thin plates of the first group in the laminating direction of the thin plates of the core while the core is housed in the case.

Antenna, watch provided with the antenna, and method of manufacturing the antenna

The differential transmission cable comprises a cable having at least one pair of differential transmission lines, one or more transmission transformers, and connectors at both ends, the transmission transformer having an integrally sintered laminate structure and a coupling coefficient of 0.65 to 0.98 at 100 MHz, the distance between a center of the transmission transformer and a tip end of the closest connector being within 0.1 m, and the distance between a center of the transmission transformer and a tip end of the farthest connector or between a center of the transmission transformer and a center of the other transmission transformer being 0.5 to 4 m. The transmission transformer is mounted onto a substrate, which is inserted into the connector or a housing of the connector having lands or a positioning holder. After wiring, the connector including the substrate is integrally resin-molded.

Differential transmission cable and joint with specific distances

A plurality of permanent magnets is disposed in a pair of yoke sections so that magnetic poles adjacent to each other and facing each other have opposite polarities. An armature coil is provided in a magnetic gap through which coil a electric current is made to flow to cause its relative movement with respect to the permanent magnets. A linear scale is provided on the stator so as to be located on the thrust center line or in the vicinity thereof, and a read head is provided on the movable member so as to face the linear scale.

Linear motor

Growing community of inventors

Saitama-ken, Japan

Hirokazu Araki