Abstract: In antenna device, a coil conductor of an antenna coil module and a conductor layer at least partially overlap. A current flows in the conductor layer to block a magnetic field generated by a current flowing in the coil conductor. A current, which flows around the periphery of an opening of the conductor layer, flows along the periphery of a slit and around the periphery of the conductor layer due to a cut-edge effect. Since magnetic flux does not pass through the conductor layer, magnetic flux attempts to bypass the conductor layer along a path in which the conductor opening of the conductor layer is on the inside and the outer edge of the conductor layer is on the outside. As a result, the magnetic flux generates relatively large loops that link the inside and the outside of a coil conductor of an antenna on a reader/writer side.

Abstract: The present invention relates to an antenna device (10) for executing several functions, particularly a transmitting function, a receiving function, and an energy transmitting function, comprising a rod core (20) made from a material that can be magnetized, extending along a rod core axis (22) and at least one rod core winding (24) about the rod core axis (22), a charged core (30) from a material that can be magnetized, extending along a charged core axis (32), and at least one charged core winding (34) about the charged core axis (32), with the charged core axis (32) and the rod core axis (22) being arranged angular in reference to each other.

Abstract: An antenna module for a terminal device includes: a substrate; and a conductive coil on the substrate and having a first end at an outside of the conductive coil and a second end at an inside of the conductive coil, the conductive coil including: one or more loops; and a plurality of conductive strips extending from an innermost one of the one or more loops.

Abstract: Embodiments of the invention provide an antenna module for NFC. According to at least one embodiment, the antenna module includes an antenna sheet patterned with a loop coil of a conductive metal material, a magnetic shielding sheet comprising a metal sheet, which is embedded in a magnetic sheet, and an adhesive film interposed between the antenna sheet and the magnetic shielding sheet.

Abstract: An antenna unit applied to an electronic device is provided. The antenna unit includes an input/output (I/O) element, a conductive wire and a magnetic material. The outer surface of the input/output element has a spiral groove. The conductive wire is disposed in the spiral groove of the input/output element. The magnetic material may be adhered above or/and under the conductive wire according to different designs. Thus, the conductive wire is insulated from the metal of environment or the input/output element.

Abstract: Provided is an antenna coil component including a bobbin around which a winding is wound, a base provided at least at one end side of the bobbin, and one or more metal terminals each fixed to the base, at least one metal terminal among these metal terminals including a fixing part for fixing the metal terminal to the base, a mounting part provided at a position away from the fixing part, and a neck part for connecting the fixing part and the mounting part to each other. The neck part has a length in a direction substantially orthogonal to a direction from the fixing part to the mounting part and substantially parallel to surfaces of the mounting part, which is narrower than that of the mounting part. Provided as well are an antenna unit using the antenna coil component, and a method of manufacturing the antenna coil component.

Abstract: A single turn loop electronic article surveillance (EAS) gate. The gate includes a closed magnetic core, a multi-turn primary winding wound around the core, and a secondary loop passing through the core once. The secondary loop is a self-supporting single turn loop, and the secondary loop is a transmit loop that generates a magnetic drive field for the article detection gate system.

Abstract: A plurality of first linear sections in a coil conductor are disposed on a lower surface of a first resin sheet. A plurality of second linear sections in the coil conductor are disposed on an upper surface of a second resin sheet. A plurality of via conductors in the coil conductor are disposed in the resin sheets. The coil conductor including the linear sections and the via conductors constitutes an antenna section. A first ground conductor is disposed on the lower surface of a third resin sheet. A second ground conductor is disposed on the upper surface of a fourth resin sheet. The first ground conductor and the second ground conductor are connected to each other by a interlayer connection conductor including a plurality of via conductors. The interlayer connection conductor does not define a closed loop surrounding the coil conductor.

Abstract: Provided is an antenna structure which is capable of having sufficient antenna performance even in an antenna having a small cross-sectional area. The antenna of the present invention comprises: a ferrite sheet; and an antenna sheet (flexible printed circuit board) which has a spiral loop antenna pattern. The antenna sheet is folded and the ferrite sheet is inserted therein to form a folded antenna. The folded antenna is configured in such a manner that a longitudinal pattern of the spiral loop antenna pattern is disposed close to a longitudinal centerline portion of the ferrite sheet.

Abstract: An antenna magnetic core of an embodiment has a laminate of a Co-based amorphous magnetic alloy thin strip and a resin layer part having an average thickness in a range of from 1 to 10 ?m. Dispersion of thicknesses of the resin layer part is within ±40% in relation to the average thickness.

Abstract: In an antenna coil including a first magnetic core, a second magnetic core, and a flexible board, coil conductors are provided on a surface of the flexible board. By winding the flexible board around the first magnetic core and the second magnetic core, a first coil portion is disposed around the first magnetic core, and a second coil portion is disposed around the second magnetic core. The winding direction of the second coil portion is opposite to that of the first coil portion. The first coil portion and the second coil portion are connected to define one coil as a whole.

Abstract: An antenna device that is built in an electronic device and that can perform communication by receiving a magnetic field transmitted from a transmitter includes an antenna coil formed on a printed circuit board and inductively coupled to the transmitter, and a magnetic sheet that attracts the magnetic field transmitted from the transmitter to the antenna coil. The antenna coil and the magnetic sheet are superposed on each other.

Abstract: This disclosure provides an antenna device including an antenna coil having a plate-shaped magnetic core with first and second main surfaces and a coil conductor wound around the magnetic core, and a flat conductor adjacent to the antenna coil. For instance, the flat conductor can be a ground electrode formed on or within a circuit substrate. The coil conductor includes a first conductor portion adjacent to the first main surface of the magnetic core and a second conductor portion adjacent to a second main surface thereof. The first conductor portion of the antenna coil is closer to an end portion of the flat conductor than the second conductor portion, with the second main surface of the magnetic core facing the flat conductor.

Abstract: A space efficient magnetic antenna is disclosed for use in tracking, positioning and other applications. In a preferred embodiment, a space efficient magnetic antenna system comprises a first magnetic antenna with a first null axis aligned within a predetermined plane and a second magnetic antenna having a second null axis aligned substantially orthogonal to a first null axis. A second magnetic antenna system lies in a minimal coupling orientation with respect to a first magnetic antenna system. Additionally, a first magnetic antenna may further comprise a plurality of interconnected magnetic antenna elements. A space efficient magnetic antenna system may include an RF module. In further embodiments, the antenna system may enclose a substantial majority of the device including the RF module; the RF module may be enclosed substantially or wholly within one or more antennas of the antenna system.

Abstract: A circuit board and a circuit module more accurately provide impedance matching between an antenna coil and an electronic component electrically connected to the antenna coil, and include a board body including board portions and a plurality of laminated insulating material layers made of a flexible material. An antenna coil includes coil conductors provided in the board portion. Wiring conductors are provided in the board portion and electrically connected to the antenna coil. The board portion has a structure that is less likely to deform than the board portion. An integrated circuit electrically connected to the wiring conductors is mounted on the board portion.

Abstract: An antenna module includes an antenna line disposed annularly, a magnetic body formed annularly along the antenna line, having a bottom part and a pair of side parts to accommodate the antenna line, and provided with end faces of the pair of side parts disposed in a same direction, and an insulator disposed between the magnetic body and the antenna line.

Abstract: An antenna includes antenna coil having a magnetic-material core and a coil conductor. The antenna coil is arranged toward a side of a planar conductor, such as a circuit board. Of the coil conductor, a first conductor part close to a first main face of the magnetic-material core and a second conductor part close to a second main face of the magnetic-material core are provided such that the first conductor part is not over the second conductor part in view from a line in a direction normal to the first main face or the second main face of the magnetic-material core. In addition, a coil axis of the coil conductor is orthogonal to the side of the planar conductor.

Abstract: Described herein are techniques related to near field coupling and wireless power transfers. A mobile device may include an edge-emitting antenna that offers ultra slim, all-metallic chassis packaging option with no cutout, uses lesser area, has robust mechanical strength, and provides EMI/ESD protection. In one example, an inductor coil is wrapped around a magnetic core and a pair of conductive layers is configured to interpose the magnetic core and the inductor coil between them to expose an edge of the magnetic core. The inductor coil being operable in a transmit mode to generate a magnetic field in response to a current passing through it. The edge is configured to enhance outward radiation of the magnetic field. Based on simulation results, the edge-emitting antenna occupies less space and provides an acceptable level of performance for coupling coefficients compared to conventional antenna.

Abstract: An antenna core includes a laminate of a plurality of Co-based amorphous magnetic alloy thin strips in which a length ratio of a long axis to a short axis is greater than 1. 60% or more of the Co-based amorphous magnetic alloy thin strips in terms of the number of the thin strips as percentage have a line-shaped mark formed along the long axis on at least one surface thereof. An antenna includes the antenna core and a winding wound around the antenna core along the long axis.

Abstract: 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.

Abstract: The invention of the disclosure is an extension cable to connect via telemetry, an external medical device in a non-sterile zone with a medical device that is within a sterile zone. The telemetry extension cable includes a cable having a length and comprising a conductor, a first RF antenna attached at one end of the cable and a second RF antenna attached at a second end of the cable, at least one of the first or second antennas configured to transmit and receive RF signals to and from an implantable medical device.

Abstract: There is provided an antenna apparatus capable of stably communicating with a communication partner and increasing the maximum possible communication range even when the antenna apparatus is relatively smaller than an antenna in the communication partner and the two antennas are disposed in close proximity on the same axis. A magnetic flux passing through a coil aperture of an antenna coil passes through a conductor aperture of a conductive layer, but the magnetic flux does not pass through the conductive layer. Accordingly, the magnetic flux is diverted to a path in which the conductor aperture of the conductive layer is the inside and the outer edge of the conductive layer is the outside. As a result, the magnetic flux passing through the coil aperture of the antenna coil makes a relatively large loop and links the inside and the outside of a coil conductor in an antenna in a communication partner with the antenna apparatus.

Abstract: A through-the-earth (TTE) communication system has a transmitter that uses an electromagnetic antenna to propagate a magnetic communication signal through the earth. The antenna comprises a coil that is wrapped a core of magnetic material. The transmitter converts voice into a pulsed direct current (DC) signal that is applied to the coil of the antenna. The antenna transforms the pulsed DC signal into a pulsed DC magnetic field that propagates through the earth, and the DC magnetic field may pass through soil, water, or other substances within the earth. A receiver at the earth's surface or other location senses the pulsed magnetic field and converts the sensed magnetic energy into a voice signal.

Abstract: An antenna apparatus, which is assembled into an electronic apparatus and made communicatable upon receipt of a magnetic field transmitted from a transmitter, includes a laminated member made by mutually superimposing an antenna coil inductively coupled to the transmitter and formed on an antenna substrate with a magnetic sheet for drawing a magnetic field transmitted from the transmitter to the antenna coil, a film-shaped protective member that covers the laminated member at least up to an end portion of the magnetic sheet, and a communication processing unit that carries out communication to and from the transmitter and is driven by an electric current flowing through the antenna coil.

Abstract: An antenna apparatus is assembled into an electronic apparatus and made communicatable upon receipt of a magnetic field transmitted from a transmitter. The antenna apparatus includes an antenna substrate having an antenna coil inductively coupled to the transmitter formed thereon and a magnetic sheet for use in drawing the magnetic field transmitted from the transmitter to the antenna coil. The magnetic sheet is inserted into a center portion of the antenna coil such that two ends of the magnetic sheet are positioned closer to the center portion than two ends of the antenna coil in an inserting direction thereof.

Abstract: In various embodiments, an antenna arrangement is provided. The antenna arrangement may include at least one integrated circuit; at least one loop antenna that is coupled to the integrated circuit and that forms a loop antenna region; at least one antenna that is coupled to the integrated circuit and that has a magnet core; wherein at least one portion of the magnet core is arranged above a portion of the loop antenna region; wherein the portion of the magnet core overlaps the portion of the loop antenna region; or wherein the portion of the magnet core does not overlap the portion of the loop antenna region.

Abstract: A coil antenna has a core that is plate-shaped and includes a magnetic material; a coil wire that is wound around the core; a first insulating layer that is arranged on a surface of the core, the insulating layer being arranged to cover the coil wire and have a flat surface opposite the core; a second insulating layer that is arranged on a rear face opposite the surface of the core, the second insulating layer being arranged to cover the coil wire and to have a flat surface opposite the core; a flat first metal layer arranged on the flat surface of the first insulating layer; and a flat second metal layer arranged on the flat surface of the second insulating layer.

Abstract: 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° to 90°.

Abstract: A stack-type inductor element includes a stack including a magnetic element layer, a coil conductor pattern provided in the stack and the magnetic element layer defines a magnetic element core, a plurality of first pad electrodes provided on one main surface of the stack, and a plurality of second pad electrodes provided on the other main surface of the stack so as to be symmetric to the plurality of first pad electrodes. One end and the other end of the coil conductor pattern are electrically connected to two of the plurality of first pad electrodes, respectively, and the plurality of second pad electrodes are all electrically open.

Abstract: An antenna device includes a multilayer body including magnetic layers or dielectric layers that are stacked, a first coil conductor that has a winding axis extending in a direction perpendicular or substantially perpendicular to a stacking direction of the multilayer body, the first coil conductor being provided in the multilayer body, and a second coil conductor that has a winding axis extending in a direction perpendicular or substantially perpendicular to the winding axis of the first coil conductor, the second coil conductor being provided in the multilayer body.

Abstract: Antenna structures made of bulk-solidifying amorphous alloys and methods of making antenna structures from such bulk-solidifying amorphous alloys are described. The bulk-solidifying amorphous alloys providing form and shape durability, excellent resistance to chemical and environmental effects, and low-cost net-shape fabrication for the highly intricate antenna shapes.

Abstract: A wireless communication module includes a multilayer structure including a magnetic block and at least one non-magnetic layer stacked on the magnetic block, the magnetic block including at least one magnetic layer, at least one inductor element disposed at the magnetic block, and an antenna coil disposed at the non-magnetic layer so as to overlap the inductor element in a planar view along a stacking direction of the non-magnetic layer with respect to the magnetic block, wherein the magnetic layer is present between the inductor element and the antenna coil.

Abstract: Two harness engagement grooves are provided at each end in the longitudinal direction of a rod-shaped antenna component, on one side thereof, and midway in the longitudinal direction, on one side thereof, a uniting groove is provided, having a width, which is smaller than the outermost width of the two harness engagement grooves.

Abstract: A transmission/reception antenna and a transmission/reception device using the antenna wherein the antenna includes a dielectric base board, an excitation loop antenna provided on the dielectric base board, a transmission/reception loop antenna provided on the dielectric base board in close proximity of but not in contact with the excitation loop antenna, and a resonance capacitor connected between two ends of the transmission/reception loop antenna. A coupling capacitor is connected to one of the two ends of the transmission/reception loop antenna. The excitation loop antenna is connected to a transmitter, and the transmission/reception loop antenna is connected to the receptor via the coupling capacitor. Thereby, the frequency property may be expanded without increasing the power consumption, and the reception processing unit is enabled to properly process the reception signal.

Abstract: To ensure a sufficient communication distance and to concurrently suppress a conductor loss, a coil antenna includes a magnetic core including a first peripheral surface including at least a first principal surface, a first coil conductor located on the first principal surface and wound around a predetermined winding axis, a first base material layer stacked on the first principal surface, including at least a first surface parallel or substantially parallel to the first principal surface, and made of a material having a lower magnetic permeability than the magnetic core, and a second coil conductor located on at least the first surface. Opposite ends of the second coil conductor are coupled to the first coil conductor on the first principal surface, and a direction in which a current flows through the first coil conductor on the first principal surface is substantially the same as a direction in which a current flows through the second coil conductor on the first surface.

Abstract: An antenna device includes a multilayer body as a base body, an antenna coil, and a capacitor chip. The multilayer body includes a magnetic layer including a first main surface and a second main surface, a first non-magnetic layer provided on the first main surface of the magnetic layer, and a second non-magnetic layer provided on the second main surface of the magnetic layer. The antenna coil includes a first coil pattern provided with the first non-magnetic layer and a second coil pattern provided with the second non-magnetic layer. The capacitor chip is connected to the antenna coil and provided on the second non-magnetic layer.

Abstract: A magnetic antenna includes a plurality of magnetic layers, coil conductor patterns wound around the magnetic layers about a winding axis in a direction perpendicular or substantially perpendicular to a stacking direction of the magnetic layers, a dielectric layer stacked on an outer layer of the magnetic layers, and a conducting pattern provided with the dielectric layer and coupled with a ground. The conducting pattern and the coil conductor patterns disposed along the outer layer are arranged such that at least a portion of the coil conductor patterns faces the conducting pattern and defines a stray capacitor therewith.

Abstract: In one embodiment, an apparatus includes an antenna having a conductive winding, with the antenna disposed about a channel. A characteristic improvement material is disposed between the antenna and the channel. In some embodiments, the characteristic improvement material includes at least one of a negative stiffness material or a negative Poisson's ratio material. Various systems and methods are also disclosed herein.

Abstract: A logging tool for use in a borehole to obtain multicomponent resistivity induction measurements using collocated coils wherein each of the transverse antennas comprises a pair of mirror-image coils symmetrically disposed about an axis of the logging tool.

Abstract: A booster antenna having an aperture and a slit extending from the aperture to a distal end portion H, and a feeding coil having a coil conductor wound around a magnetic core. At least a part of an opening of the coil conductor is disposed at a position overlapping with the aperture of the booster antenna in plan view. The coil conductor is wound around the magnetic core such that a first conductor part disposed on a first surface of the magnetic core and a second conductor part disposed on a second surface of the magnetic core are located at different positions in plan view. The feeding coil is disposed such that the first surface faces the booster antenna and the first conductor part is disposed close to the distal end portion H of the booster antenna.

Abstract: An antenna device includes an antenna coil, a magnetic core, and a metal member. The antenna coil is mounted on a flexible base. The antenna coil is wound in a loop shape or a spiral shape such that its winding center section is a coil opening section. The magnetic core passes through a slit opening section in the flexible base. The metal member has a rectangular opening. The antenna coil is exposed through the opening in the metal member. A front-side coil conductor is nearer the opening than the magnetic core, and thus a magnetic flux links the front-side coil conductor.

Abstract: An antenna assembly includes a substrate including a first surface and a second surface, an antenna coil attached to the first surface of the substrate and including a number of pins, a flexible printed circuit board including a number of first contacts electrically connected to the pins, wherein the substrate is disposed in a same plane with the flexible printed circuit board.

Abstract: An antenna module includes a first coil conductor, a second coil conductor and a magnetic layer. The first coil conductor and the second coil conductor are arranged with a magnetic layer interposed therebetween so that a coil aperture of the first coil conductor and a coil aperture of the second coil conductor are opposed to each other in alignment. An inner end portion of the first coil conductor and an inner end portion of the second coil conductor are electrically connected. The first coil conductor and the second coil conductor are connected to each other so that directions of magnetic fluxes generated in coil-wound axis directions of the first coil conductor and the second conductor are mutually opposite to each other. A magnetic flux ? entering a metal body in a perpendicular direction thereto flows in a lateral direction of the magnetic layer.

Abstract: In a coil antenna device, a multilayer structure includes non-magnetic sheets and magnetic sheets stacked on each other. A coil conductor is provided in the multilayer structure such that a portion of the magnetic material defines a magnetic core and such that a coil axis extends along a principle surface of the multilayer structure. The coil conductor includes a plurality of line conductors each of which extends on one principle surface side of the magnetic material, a plurality of line conductors each of which extends on the other principle surface side of the magnetic material, and a plurality of via-hole conductors extending in a thickness direction of the multilayer structure so as to be surrounded with the magnetic material. The plurality of via-hole conductors defines a coiled structure together with the line conductors.

Abstract: A magnetic field antenna that provides high efficiency and a compact form factor. Electromagnetic shielding of electrical components used in the antenna is provided, and one embodiment of the invention is a wireless battery-free communications earplug.

Abstract: There is provided a magnetic composite sheet including: a magnetic layer including first and second magnetic pieces having different sizes; and a cover film formed on one surface or both surfaces of the magnetic layer, wherein, in a cross-section of the magnetic composite sheet taken in a direction parallel to a direction in which the magnetic layer and the cover film are laminated, when a length of the first magnetic piece in a vertical direction is a and a length thereof in a horizontal direction is b, and a length of the second magnetic piece in the vertical direction is a? and a length thereof in the horizontal direction is b?, b/a is greater than b?/a?(b/a>b?/a?).

Abstract: An antenna device includes a power feed coil antenna connected to a power feed circuit, and a booster coil antenna including wound coil conductors and disposed so as to be electromagnetically coupled to the power feed coil antenna. The power feed coil antenna includes a first coil antenna and a second coil antenna each including a coil conductor, and the coil conductors of the first and second coil antennas are connected in phase with each other. The first coil antenna is disposed such that the winding axis of the coil conductor of the first coil antenna extends perpendicularly or substantially perpendicularly to the winding axis of the booster coil antenna, and such that at least a portion of the first coil antenna overlaps the coil conductor of the booster coil antenna as viewed in plan.

Abstract: An antenna device includes a feed coil connected to a feed circuit, and a coil antenna disposed near the feed coil. A ferrite sheet, in which a magnetic loss term in a usable frequency band is relatively large, is provided between the feed coil and the coil antenna. The feed coil and the coil antenna are magnetically coupled to each other via the ferrite sheet. With this configuration, signal transmission efficiency between the feed coil and the coil antenna is enhanced.

Abstract: An insert type antenna module for a portable terminal and a method for manufacturing the same are disclosed. The antenna radiation part is formed of a conductive metal sheet having a curve with at least one axis, and the antenna code to which the antenna radiation part is engaged is inject-formed, and a cover is inject-formed at one exposed outer surface of the antenna core in a state that the antenna core is inserted. The present invention is characterized in that in a manufacture of an antenna module for a mobile terminal, a cover is inject-formed at an outer surface of the exposed side of an antenna core in a state that an antenna core to which an antenna radiation part is engaged is inserted.

Abstract: 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.