Abstract: A device tests the function of an antenna system. The antenna system has a plurality of antennas that are interconnected with an assigned input of a selection unit. The antennas of a first antenna group are interconnected with the inputs of a first multiplexer. The antennas of a second antenna group are interconnected with the inputs of a second multiplexer. The antennas of the first and second antenna groups are arranged adjacently and/or overlap in pairs. A computing unit provides control signals for the selection unit to feed an AC signal into a selected antenna of the first antenna group and to capture the antenna signal present on each antenna of the second antenna group for the selected antenna at an output of the selection unit. A fault is inferred from the comparison of the determined antenna signals for the selected antenna and associated expected antenna signals.

Abstract: The magnetic detector 1 according to the present disclosure includes a transmission line 10 having a linear first conductor 11 including a magnetic material, a signal generator 30 configured to input a pulse as an incident wave to the transmission line 10, and a calculator 20 configured to detect a reflected wave caused by impedance mismatching at a magnetic field application position of the transmission line 10 and the incident wave. The calculator 20 calculates a position and a strength of the magnetic field applied to the transmission line 10 on the basis of the incident wave and the reflected wave.

Abstract: A long range low frequency antenna having an elongated magnetic core; a coil surrounding the elongated magnetic core; a bobbin; where the elongated magnetic core is introduced in a cavity of the bobbin; and a housing overmolded on the bobbin in a waterproof manner. The antenna also comprises at least one damper located at one extreme of the elongated magnetic core. The at least one damper is made of an elastic and thermally-stable compound having a resin and a first filler including a natural mineral filler. Therefore, longitudinal dilatations, shrinkage, mechanical shocks, and vibrations of the elongated magnetic core are absorbed by the at least one damper, avoiding an impact over an inductance variation of the coil.

Abstract: An electronic device comprising an array antenna according to various embodiments of the present invention may comprise: a housing comprising a first plate, a second plate facing away from the first plate, and a side member surrounding the space between the first plate and the second plate; a display visible through a part of the first plate; a first printed circuit board comprising a first surface facing the side member, a second surface facing away from the first surface, a first edge adjacent close to the first plate, and a second edge closer to the second plate than the first edge, the first printed circuit board comprising one or more conductive plates on the first surface; a second printed circuit board extending from the first edge so as to bend at an obtuse angle with regard to the first surface, the second printed circuit board comprising one or more first conductive patterns; a third printed circuit board extending from the second edge so as to bend at an obtuse angle with regard to the first surfac

Abstract: An RFID tag is provided for transmitting and receiving a communication signal. The RFID tag includes a base material, an antenna pattern disposed on the base material, and a high-loss member. The high-loss member is disposed adjacent to the antenna pattern and has a high loss at a frequency higher than a frequency of the communication signal, compared with the antenna pattern and the base material. When the RFID tag is subjected to an electromagnetic wave heating microwave, the high-loss member generates heat and the antenna pattern is cut at a position of the high-loss member.

Abstract: A body includes a support strut extending in a second direction. A first terminal includes a first fastening portion to exert a force on the support strut in a third direction perpendicular or substantially perpendicular to the second direction, a second fastening portion to exert a force on the support strut in a fourth direction opposite to the third direction, a first coupling portion coupled to the first protrusion and the second protrusion, and a contact portion coupled to at least one of the first fastening portion, the second fastening portion, or the first coupling portion, the contact portion extending in a fifth direction perpendicular or substantially perpendicular to the second direction.

Abstract: Disclosed herein is a coil component that includes a first coil, and a second coil disposed so as to surround the first coil. The first coil includes a first section extending in a first direction, a second section extending in a second direction orthogonal to the first direction, and a third section positioned between the first and second sections. Gaps between the first, second, and third sections of the first coil and the second coil as viewed in a coil axis direction have a first width, a second width, and a third width, respectively. The second width is larger than the first width and smaller than the third width.

Abstract: A steerable beam antenna includes a plurality of semiconductor chips arranged along a longitudinal axis. Each of the chips has a ground plane on its upper surface, and is doped to form an array of semiconductor switches arranged along the longitudinal axis. A corresponding array of scattering elements, each having a first leg and a second leg, is mounted on each chip along the longitudinal axis. A first electrode of each switch is configured for connection to a control circuit, a second electrode is connected to the ground plane, and a third electrode is connected to the first leg of one of the array of scattering elements, the second leg of which is connected to the ground plane. A dielectric element is mounted on the antenna chips along the longitudinal axis above the arrays of switches and scattering elements and is separated from the scattering elements by an air gap.

Abstract: An ultra-low-profile low frequency antenna including a magnetic core having coil winding channels in three intersecting axial directions orthogonal to each other, defining X-axis (X), Y-axis (Y) and Z-axis (Z), receiving respective X-coil (DX), Y-coil (DY), and Z-coil (DZ). A Z-coil winding channel surrounds the magnetic core around the Z-axis (Z), providing partial grooves confined between two parallel surfaces. The thickness of the magnetic core in the Z-axis (Z) is less than 1.2 mm. Each partial groove has a width in the Z-axis (Z) equal or less than 0.4 mm and its depth in a radial direction perpendicular to the Z-axis (Z) is at least two times of its width. The Z-coil (DZ) is wound within said groove and extends radially from ? to ? of the groove's depth. The outer edge of the Z-coil is at the entrance of the groove.

Abstract: A wearable device is provided. The wearable device includes a substrate and a first antenna module. The first antenna module includes a first magnetic core and a first antenna wire coil. The first magnetic core is disposed on the substrate. A first angle is formed between the first magnetic core and the substrate. The first antenna wire coil is wound disposed on the first magnetic core.

Abstract: Apparatus for determining the electrical conductivity of target cervical tissue using magnetic impedance spectroscopy comprising: an excitation coil for producing a magnetic field which is capable of inducing currents in the target cervical tissue; a gradiometer for detecting perturbations in said magnetic field caused by said induced currents, the gradiometer including screening means for minimising sensitivity to tissues other than the target tissue; processing means for determining an electrical conductivity of said target cervical tissue from said perturbations.

Abstract: A system 100 to detect aircraft ground proximity including: a transmitter 110 for transmitting a radio frequency signal along an extended landing gear 20 of an aircraft 10, a sensor 120 configured to detect a parameter of the radio frequency, and a controller 130 configured to detect a change in the detected parameter on the basis of an output of the sensor 120, and to issue a landing signal when the change in the detected parameter meets a predetermined criterion. The predetermined criterion is indicative of a certain aircraft ground proximity.

Abstract: Disclosed herein is a coil component that includes a substrate, a coil pattern formed on one surface of the substrate, and a magnetic layer comprising a composite material obtained by dispersing magnetic particles in resin and formed on the one surface of the substrate so as to cover the coil pattern. The coil pattern has a flat shape in which a thickness thereof is smaller than a radial width. Each of the magnetic particles has a flat shape in which a thickness thereof in a direction perpendicular to the one surface of the substrate is smaller than a diameter in a direction parallel to the one surface of the substrate. Some of the magnetic particles exist within a height range of the coil pattern with respect to the one surface of the substrate.

Abstract: An antenna module includes an integrated circuit (IC), a substrate having a first region having one or more antenna disposed on a surface thereof and a second region flexibly bent and electrically connected to the IC to provide an electrical connection path to the one or more antenna and the IC, a set substrate electrically connected to the IC, and a set module disposed on the set substrate between the set substrate and the first region.

Abstract: A mobile device for enhancing antenna stability includes a nonconductive frame, a back cover, a PIFA (Planar Inverted F Antenna), and a U-shaped ground element. The PIFA is disposed between the nonconductive frame and the back cover. The U-shaped ground element is coupled to the PIFA, and is at least partially attached to the nonconductive frame. The vertical projection of the PIFA at least partially overlaps the U-shaped ground element.

Abstract: The present invention disclosed a radio-frequency identification (RFID) device. The RFID device comprises a protective body and a RFID circuit unit located inside the protective body. The RFID circuit unit comprises a printed circuit board (PCB), a RFID chip and an antenna disposed thereon. A front surface of the PCB faces a top surface of the protective body; a rear surface of the PCB faces a bottom surface of the protective body.

Abstract: This RFID tag comprises: a film wiring substrate including a flexible base material having a first surface and a second surface located opposite to the first surface, and conductors located on the first and second surfaces, respectively; and an RFIC IC connected to the conductors, wherein the film wiring substrate is bent, and at least a first conductor part included in the conductor on the first surface, a second conductor part included in the conductor on the first surface or the second surface, and a conductor on the second surface that does not include the second conductor part overlap each other.

Abstract: A vehicle door handle for a motor vehicle is described, which includes an integrated transmitting and/or receiving device which comprises an LF antenna and a separately formed NFC antenna. The NFC antenna has a plurality of windings provided on a circuit board. The LF antenna has a plurality of coils wound around a core material formed separately from the circuit board. The NFC antenna encompasses a projection of the LF antenna on the circuit board.

Abstract: This disclosure presents an apparatus and system for lowering the cost of implementing a downhole sensor system using attachable collars. In some aspects, the attachable collar includes a transmitter component, while supporting electronics are included with a main collar, thereby reducing the cost of the attachable collar. The supporting electronics can send a transmission signal, a control signal, a synchronization clock signal, a selected transmission frequency, a sensor orientation and selection, and other instructions to the transmitter in the attachable collar. The receiver in the main collar can receive the output, as reflected by the subterranean formation, and transform the output to subterranean formation evaluation measurements. The measurements can be communicated to other systems. In some aspects, the attachable collar can include the receiver and the main collar can include the transmitter.

Abstract: Disclosed are an antenna module and a method for producing same, the antenna module having an insulating substrate interposed between a base substrate and electrodes so as to keep the base substrate apart from the electrodes and thereby prevent interference by the electrodes in the magnetic permeability of the base substrate. The disclosed antenna module comprises: a base substrate made of a magnetic material; an insulating substrate stacked on the lower surface of the base substrate; a first electrode disposed on the lower surface of the insulating substrate; a second electrode disposed, apart from the first electrode, on the lower surface of the insulating substrate; and a radiation wire which is wound around the base substrate and/or the insulating substrate and has one end thereof connected to the first electrode and the other end thereof connected to the second electrode.

Abstract: A thin, flexible antenna module is provided for use in a smartphone. When the antenna module is assembled in the smartphone, the antenna module provides an MST antenna and an NEC antenna. For this, the antenna module includes a flexible PCB containing coils and further includes a magnetic sheet engaged with flexible PCB. The flexible PCB and the magnetic sheet are attached to each other to form a single body.

Abstract: The present invention relates to an inductor device, a method of manufacturing same and antenna. The proposed inductor device comprising a magnetic core (1), an electrically insulating support (10) with a cavity (11) arranged around said magnetic core (1), and three windings (DX, DY, DZ) of conductive wire arranged orthogonal to one another, wherein said electrically insulating support (10) is made of a single part and completely houses the magnetic core (1) which is accessible through an opening, the three windings (DX, DY, DZ) being supported on winding supporting faces (12X, 12Y and 12Z) of the electrically insulating support, confined between winding limiting edges (22) defined by lower corner protuberances (20) and centered with respect to the three orthogonal axes (X, Y, Z) such that said electrically insulating support (10) assures symmetry and orthogonality of said electromagnetic field vectors generated by the mentioned inductor device.

Abstract: A coil for transfer of information or energy is described. The coil includes an electrically conductive magnetically insulative first layer and a magnetically conductive second layer bonded to the first layer along the length of the first layer. The first and second layers are wound to form a plurality of substantially concentric loops. A width and a length of the second layer may be substantially co-extensive with a respective width and length of the first layer so as to expose opposing longitudinal edge surfaces of the first layer along the length of the first layer. At least one of the opposing longitudinal edge surfaces may include a regular pattern extending substantially along a same first direction and across substantially the entire coil. A method of making the coil is described.

Abstract: An eLORAN receiver may include an antenna and eLORAN receiver circuitry coupled to the antenna. The antenna may include a ferromagnetic core and an H-field signal winding coupled to the ferromagnetic core. The eLORAN receiver may have an antenna tuning device including a tuning winding surrounding the ferromagnetic core, and a tuning circuit coupled to the tuning winding.

Abstract: Proposed is a combo antenna module which laminates a loop coil and an antenna sheet to configure a combo antenna, thereby preventing the degree of design freedom from being lowered and minimizing the manufacturing cost. The proposed combo antenna module includes a magnetic sheet, a loop coil disposed on the upper surface of the magnetic sheet, and an antenna sheet having the area smaller than that of the magnetic sheet, and disposed on the upper surface of the magnetic sheet, in which the antenna sheet overlaps a part of the loop coil.

Abstract: Implantable transponders comprising no ferromagnetic parts for use in medical implants are disclosed herein. Such transponders may assist in preventing interference of transponders with medical imaging technologies. Such transponders may optionally be of a small size, and may assist in collecting and transmitting data and information regarding implanted medical devices. Methods of using such transponders, readers for detecting such transponders, and methods for using such readers are also described.

Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include one or more antennas and transceiver circuitry such as millimeter wave transceiver circuitry. The antennas may be formed from metal traces on printed circuits. A flexible printed circuit may have an area on which the transceiver circuitry is mounted. Protruding portions may extend from the area on which the transceiver circuitry is mounted and may be separated from the area on which the transceiver circuitry is mounted by bends. Antenna resonating elements such as patch antenna resonating elements and dipole resonating elements may be formed on the protruding portions and may be used to transmit and receive millimeter wave antenna signals through dielectric-filled openings in a metal electronic device housing or a dielectric layer such as a display cover layer formed from glass or other dielectric.

Abstract: A hearing device includes first, second, and third antennas oriented respectively along first, second, and third axes that are different from one another. The device includes first channel circuitry coupled to transceive and process antenna signals of each of the antennas. The antennas and the first channel circuitry communicate with another hearing device via a near field magnetic induction (NFMI) signal through a first near field magnetic induction (NFMI) communication channel. Second channel circuitry is coupled to transceive and process the antenna signals of each of the antennas. The antennas and the second channel circuitry communicate with the other device via the NFMI signal through a second NFMI communication channel. Third channel circuitry is coupled to transceive and process the antenna signals of each of the antennas. The antennas and the third channel circuitry communicate with the other device via the NFMI signal through a third NFMI communication channel.

Abstract: Provided is a medical apparatus for a patient comprising an external system and an implantable system. The external system can be configured to transmit one or more transmission signals, each transmission signal comprising at least power or data. The implantable system can be configured to receive the one or more transmission signals from the external system. The external system comprises a first external device comprising at least one external antenna configured to transmit a first transmission signal to the implantable system. The implantable system comprises a first implantable device comprising at least one implantable antenna configured to receive the first transmission signal from the first external device. At least one of the external antenna or implantable antenna comprises an antenna assembly comprising: at least one transmitting/receiving antenna; and at least one shielding element positioned between the at least one transmitting/receiving antenna and an interfering component.

Abstract: According to some embodiments, a wireless power transmitter is disclosed. The wireless power transmitter can include a plurality of transmission coils arranged to cover a charging area and coupled with a ferrite; a plurality of local power controllers, each of the plurality of local power controllers coupled to drive a subset of the plurality of transmission coils, each subset of the plurality of transmission coils including a plurality of the plurality of transmission coils; and a microcontroller unit (MCU) coupled to the plurality of local power controllers, the microcontroller unit including a MCU processor executing instructions to designate states of each of the plurality of transmission coils, the states including active, de-active, and selected for receiver detection, and executing instructions to transmit instructions to each of the plurality of local power controllers in accordance with the state designations.

Abstract: A thin, flexible antenna module is provided for use in a smartphone. When the antenna module is assembled in the smartphone, the antenna module provides an MST antenna and an NFC antenna. For this, the antenna module includes a flexible PCB containing coils and further includes a magnetic sheet engaged with flexible PCB. The flexible PCB and the magnetic sheet are attached to each other to form a single body.

Abstract: The invention relates to antenna technology, especially, to electrically small transmitting and receiving antennas for operation at frequencies ELF-VHF. Magneto-dielectric dipole, being a transmitting and receiving antenna element, configured to be matched to a resonant frequency f, the antenna element comprised of an inductive winding configured to be connected to a power source and of an elongated magnetic core inserted through the inner space of the inductive winding and comprised of a ferrite material having mass and parameters sufficient to retain magnetic properties of the ferrite material within a magnetic field induced by the inductive winding when the inductive winding is fed by an electric current equivalent to a power of 0.0001 watts or higher at the resonant frequency f. Use of the invention improves mobility and performance of the antenna element when used either as a part of mobile radio station onboard a fast-moving vehicle or outdoors exposed to gusty winds.

Abstract: An RFID tag that includes an RFID tag body having a conductor in a loop-like shape or a coil-like shape, and metal fixtures for fixing the RFID tag body to a metal surface of an article. The conductor is formed in an element body in a rectangular parallelepiped shape that has first and second side surfaces facing each other, third and fourth side surfaces facing each other and orthogonal to the first side surface, a top surface, and a bottom surface serving as a mounting surface. A plane of an opening of the conductor is parallel to the first side surface and the second side surface, and the metal fixtures each include a first portion protruding along an extension surface of the bottom surface, a second portion disposed along the third side surface or the fourth side surface, and a third portion disposed along the top surface.

Abstract: Disclosed herein is an antenna device that includes a substrate, a conductor pattern formed on the substrate, and a magnetic sheet formed on the substrate. The conductor pattern includes a spiral or loop-shaped antenna coil and a spiral or loop-shaped coupling coil connected to the antenna coil and having a diameter smaller than that of the antenna coil. The antenna coil overlaps the magnetic sheet. The magnetic sheet has a first opening at a position overlapping the coupling coil such that an inner diameter area of the coupling coil completely overlaps the first opening in a plan view.

Abstract: A multiband 3D universal antenna having a magnetic core surrounded by a multiaxial coil wound around each of three orthogonal axis X, Y, Z, the multiaxial coil including at least two different coils wound around at least one of the three orthogonal axis; a support providing backing and/or isolation of the coils and a connection box connected to the external connectors providing a reconfigurable connection between the external connectors, so that several different antenna coil circuits are obtainable. Each coil of each axis has a specific cross section and a given number of turns and each coil is provided with two external connectors.

Abstract: A thin, flexible antenna module is provided for use in a smartphone. When the antenna module is assembled in the smartphone, the antenna module provides an MST antenna and an NFC antenna. For this, the antenna module includes a flexible PCB containing coils and further includes a magnetic sheet engaged with flexible PCB. The flexible PCB and the magnetic sheet are attached to each other to form a single body.

Abstract: An electronic timepiece includes a cylindrical case body, a rear cover that covers an opening of the case body, a patch antenna, and an antenna holder that presses the antenna against the main plate in a direction from the rear cover to the main plate, in which the patch antenna has a radiation element provided on an antenna radiation surface located on an opposite side to a surface facing the rear cover and a first step provided on the antenna radiation surface, and the main plate has a second step provided at a position corresponding to the first step.

Abstract: An electrically conductive material configured having at least one opening of various unlimited geometries extending through its thickness is provided. The opening is designed to modify eddy currents that form within the surface of the material from interaction with magnetic fields that allow for wireless energy transfer therethrough. The opening may be configured as a cut-out, a slit or combination thereof that extends through the thickness of the electrically conductive material. The electrically conductive material is configured with the cut-out and/or slit pattern positioned adjacent to an antenna configured to receive or transmit electrical energy wirelessly through near-field magnetic coupling (NFMC). A magnetic field shielding material, such as a ferrite, may also be positioned adjacent to the antenna. Such magnetic shielding materials may be used to strategically block eddy currents from electrical components and circuitry located within a device.

Abstract: One example discloses a device including a near-field electromagnetic induction (NFEMI) antenna, including: a first inductive coil having a first end coupled to a first feed connection and a second end coupled to a second feed connection; a second inductive coil, having a first end coupled to either end of the first inductive coil or either one of the feed connections; wherein a second end of the second inductive coil is electrically open-ended; wherein the first inductive coil is configured to receive or transmit near-field magnetic signals; and wherein the second inductive coil is configured to receive or transmit near-field electric signals.

Abstract: An antenna device includes a magnetic core having first and second main surfaces and extending in a first direction, and planar first and second coils connected in series and disposed next to each other in the first direction. The first coil has a first portion located on a side of the first main surface and a second portion located on a side of the second main surface and not overlapping the first portion in a plan view. The second coil has a third portion located on the side of the first main surface and a fourth portion located on the side of the second main surface and disposed at a position that does not overlap the third portion in the plan view. The shortest distance between the second and fourth portions is shorter than the shortest distance between the second and third portions.

Abstract: According to various embodiments, an electronic device may include: a housing including a front plate and a rear plate disposed opposite the front plate; a display disposed in a space between the front plate and the rear plate and viewable through at least a portion of the front plate; an antenna structure including at least one coil having a first surface facing the rear plate in the space and a second surface facing a direction opposite the first surface, the antenna structure configured to transmit and/or receive a signal of a selected or designated frequency; a first magnetic sheet disposed at the first surface; a second magnetic sheet at least partially overlapping the first magnetic sheet when viewed from above the rear plate, the second magnetic sheet being disposed at the second surface; and a third magnetic sheet disposed closer to the rear plate than the second surface, and spaced apart from the first magnetic sheet to have electromagnetically designated isolation with the first magnetic sheet with

Abstract: A thin, flexible antenna module is provided for use in a smartphone. When the antenna module is assembled in the smartphone, the antenna module provides an MST antenna and an NFC antenna. For this, the antenna module includes a flexible PCB containing coils and further includes a magnetic sheet engaged with flexible PCB. The flexible PCB and the magnetic sheet are attached to each other to form a single body.

Abstract: A magnetic-inductive antenna for a hearing instrument includes two antenna surfaces which are formed from magnetic, flexible foil, and a base which is wound with an antenna winding. The antenna surfaces are formed from magnetic foil blanks which are separated from one another. The base has, at each of its end sides, a respective opening into which a respective one of the foil blanks is inserted. A hearing instrument and a method for producing a magnetic-inductive antenna for a hearing instrument are also provided.

Abstract: A coil antenna having a capacitor that is not separated from a metal terminal or an electrode of a mounting substrate even when a root portion of a bobbin around which a coil is wound is bent by an external force. The coil antenna includes a bobbin; a coil wound around the bobbin; a capacitor connected to the coil; a base made of an insulating material formed integrally with the bobbin; and a mounting substrate having a plate shape with a pair of electrodes formed on a surface of the mounting substrate extended from the base for mounting the capacitor, such that the mounting substrate is held in a cantilevered manner in a winding direction of the coil.

Abstract: An RFID tag including an RFIC element, a first inductor element that includes a first insulating substrate having a mounting surface on which the RFIC element is mounted, and first coil-shaped antenna internally embedded in first insulating substrate with a winding axis perpendicular to the mounting surface, and second inductor element that includes second insulating substrate mounted on the mounting surface, and second coil-shaped antenna internally embedded in second insulating substrate, electrically connected to first coil-shaped antenna, and with a winding axis parallel to the mounting surface. The first insulating substrate includes a laminate with dielectric layers or magnetic layers laminated, and the first coil-shaped antenna includes a laminate coil-shaped antenna in which conductor patterns are each formed on a corresponding one of the layers of the laminate, such that they are connected to each other through interlayer connection conductor.

Abstract: Disclosed is an antenna module for near field communication, which stacks laminates on which a vertical winding radiation pattern and a horizontal winding radiation pattern are formed, respectively, thereby improving communication performance on the side surface and one surface of a portable terminal while minimizing a mounting space. The disclosed antenna module for near field communication includes a first magnetic member; a vertical winding radiation pattern winding the outer circumference of the first magnetic member; a second magnetic member stacked on the lower surface of the first magnetic member; a horizontal winding radiation pattern formed on one surface of the second magnetic member; a dielectric stacked on the lower surface of the second magnetic member; and a terminal portion formed on the dielectric to be connected to at least one of the vertical winding radiation pattern and the horizontal winding radiation pattern.

Abstract: Disclosed are techniques for using ranging signals to determine a position of a pedestrian user equipment (P-UE). In an aspect, a UE receives a plurality of ranging signals transmitted by one or more UEs, measures one or more properties of each of the plurality of ranging signals, and calculates an estimate of the position of the P-UE based on the one or more properties of each of the plurality of ranging signals. In an aspect, the P-UE transmits a plurality of ranging signals, receives a first message and a second message from first and second vehicle UEs (V-UEs), the first and second messages including first and second estimated positions of the P-UE and associated first and second confidences, and calculates an estimate of the position of the P-UE based on the first estimated position, the first confidence, the second estimated position, the second confidence, or a combination thereof.

Abstract: A underwater communication device communicates data with another underwater communication device having another first coil and another second coil in water. The underwater communication device includes a first coil configured to transmit the data to and from the other first coil via a magnetic field, a second coil configured to transmit the data to and from the other second coil via a magnetic field, a supply unit configured to supply the data to the first coil and the second coil, a first capacitor connected to the first coil and forming a first resonance circuit that resonates with the first coil at a first resonance frequency, and a second capacitor connected to the second coil and forming a second resonance circuit that resonates with the second coil at a second resonance frequency that is different from the first resonance frequency.

Abstract: A printed wiring board comprises a sheet-shaped core base material containing a magnetic material, a coil disposed inside the core base material, and an external circuit layer disposed on at least one of first and second surfaces of the core base material opposite to each other.

Abstract: An antenna device incorporated in an electronic apparatus and communicating with an external device via an electromagnetic field signal, including: an antenna coil inductively coupled to the external device and provided by winding around a conducting wire in planar shape; a magnetic sheet arranged to overlap with the antenna coil mutually along the antenna coil by inserting the magnetic sheet into a coil opening provided at center side of the antenna coil; and a metallic cover formed with an opening near an end of the metallic cover and arranged at surface side of the antenna coil opposing to the external device, wherein the antenna coil is arranged to overlap with the metallic cover in a region between the opening and the end of the metallic cover at a backside surface of the metallic cover opposite to a surface of the metallic cover opposing to the external device.