Hitachi Metals, Ltd.

Masaki Nakamura

Hirohiko Miki

Hiroshi Okamoto

Masahiro Mita

Mitsuhiro Watanabe

Hirokazu Araki

Fumiko Akano

Tadashi Kodani

Provided is a magnetic sheet including a resin film and a thin sheet-shaped magnetic body adhered to the resin film by an adhesive layer sandwiched between the thin sheet-shaped magnetic body and the resin film. The thin sheet-shaped magnetic body is made from an Fe-based metal magnetic material, has a thickness of 15 &#x3bc;m to 35 &#x3bc;m, and has an AC relative magnetic permeability (&#x3bc;) in the range of 220 to 770 at a frequency of 500 kHz.

Magnetic sheet, electronic device using same, and method for manufacturing magnetic sheet

A near-field communication antenna comprising at least one annular coil, a planar, non-magnetic resin member holding the annular coil, a planar, soft-magnetic member overlapping the non-magnetic resin member via the annular coil, and terminals to which the conductor wire leads of the annular coil are connected, the annular coil being received in a circumferential recess along the periphery of the non-magnetic resin member lest that it projects from the periphery of the magnetic member, and the conductor wire leads of the annular coil being connected to the terminals through notches provided in the peripheral edge of the soft-magnetic member.

Near-field communication antenna, antenna module and wireless communications apparatus

An antenna comprising a coreless coil formed by winding a conductor wire, a relay member connected to the coil, and a magnetic plate member covering the coil and part of the relay member; the relay member comprising a substrate having a notch for lead wires of the coil, and a pair of terminal members formed on the substrate; each terminal member comprising an internal terminal portion connected to an end of each lead wire, an external terminal portion connected to an external circuit, and a line portion connecting the internal terminal portion to the external terminal portion; the coil and part of the relay member disposed on the magnetic member being fixed to a first adhesive layer on the non-transmission side of the coil; and the internal terminal portion being positioned in a region overlapping the magnetic member, or in a region surrounded by the notch of the magnetic member.

Antenna

A core assembly comprising first and second core members each having a rectangular body around which an X-axis coil and a Y-axis coil are wound, and flanges integrally and diagonally extending from the body; and a bobbin having an annular portion and projections diagonally extending therefrom; the projections of the bobbin being provided with terminal members connected to coil ends of the X-axis coil, the Y-axis coil and the Z-axis; the annular portion of the bobbin acting as a space for disposing the first core member from one side, and providing a space receiving at least partially the body of the second core member from the other side, such that the body of the first core member is at least partially adjacent to the body of the second core member; and a space for winding the Z-axis coil being provided between the projections of the bobbin and the flanges of the second core member.

Three-axis antenna and core assembly used therein

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;.

Growing community of inventors

Tottori, Japan

Masaki Nakamura