Patent application number | Description | Published |
20080224935 | ANTENNA - An antenna includes inductance elements that are magnetically coupled together, an LC series resonant circuit that includes one of the inductance elements and capacitance elements, and an LC series resonant circuit that includes another of the inductance elements and capacitance elements. The plurality of LC series resonant circuits are used to radiate radio waves and are used as inductances of a matching circuit that matches an impedance when a power supply side is viewed from power supply terminals and a radiation impedance of free space. | 09-18-2008 |
20080246664 | WIRELESS IC DEVICE - A wireless IC device includes a spiral line electrode portion and a first capacitance electrode connected to the inner end of the line electrode portion, which are disposed on the top surface of a substrate. A second capacitance electrode opposing the first capacitance electrode and a cross line electrode, which connects the second capacitance electrode and a connecting portion that connects the top and bottom surfaces, are disposed on the bottom surface of the substrate. The connecting portion electrically connects the outer end of the line electrode portion and an end of the cross line electrode. A wireless IC is mounted such that terminal electrodes thereof are connected to the connecting portion and an end of a radiating electrode. A radiating/resonating electrode including the line electrode portion, the capacitance electrodes, and the cross line electrode can act both as a resonant circuit for a resonant tag and as a radiating electrode serving as an RFID tag. | 10-09-2008 |
20090002130 | WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip having a power supply circuit including a resonant circuit having a predetermined resonant frequency and a radiation plate that externally radiates a transmission signal supplied from the power supply circuit and that supplies a reception signal externally transmitted to the power supply circuit. The radiation plate is connected to the power supply circuit via an electric field or the radiation plate is coupled to the power supply circuit via a magnetic field. The radiation plate is a two-surface-open type radiation plate including at least one radiation portion arranged to externally exchange a transmission-reception signal and a power supply portion arranged to exchange a transmission-reception signal with the power supply circuit. | 01-01-2009 |
20090009007 | PRODUCT INCLUDING POWER SUPPLY CIRCUIT BOARD - A product includes a power supply circuit board, which includes a power supply circuit having a stable frequency characteristic which enables communication among various products to be obtained. The product includes a power supply circuit board including a power supply circuit arranged thereon having an inductance element, and a wireless communication circuit board electrically connected to the power supply circuit. The wireless communication circuit board is mounted on the power supply circuit board. The product further includes a radiation plate which emits a transmission signal which is supplied from the power supply circuit through electromagnetic field coupling and which has a frequency substantially determined in accordance with a resonant frequency of the power supply circuit, and which is used to supply a reception signal to the power supply circuit through electromagnetic field coupling. | 01-08-2009 |
20090021352 | RADIO FREQUENCY IC DEVICE AND ELECTRONIC APPARATUS - A radio frequency IC device includes a radio frequency IC chip arranged to process a transmitted/received signal, a printed circuit board on which the radio frequency IC chip is mounted, an electrode arrange on the circuit board, and a loop electrode that is arranged on the circuit board so that the loop electrode is electrically connected to the radio frequency IC chip and is coupled to the electrode by electromagnetic coupling. The electrode is coupled to the radio frequency IC chip via the loop electrode so as to transmit or receive a high-frequency signal. A power supply circuit board including a resonance circuit and/or a matching circuit may be disposed between the radio frequency IC chip and the loop electrode. | 01-22-2009 |
20090021446 | WIRELESS IC DEVICE AND ELECTRONIC DEVICE - A wireless IC device includes a wireless IC chip for processing a transmission/reception signal, a printed wiring circuit board on which the wireless IC chip is mounted, a ground electrode disposed on the circuit board, and a substantially loop-shaped electrode that is electrically conducted to the wireless IC chip and disposed on the circuit board so as to be coupled to the ground electrode by an electromagnetic field. The ground electrode is coupled to the wireless IC chip via the substantially loop-shaped electrode to transmit/receive a radio frequency signal. A feeder circuit board including a resonant circuit and/or a matching circuit may be interposed between the wireless IC chip and the substantially loop-shaped electrode. | 01-22-2009 |
20090034595 | DATA COUPLER - A data coupler includes an antenna substrate that is not electrically connected in a DC arrangement to an electric power line, is arranged adjacent to the electric power line, and is connected to a modem. A resonant circuit including an inductance element and a capacitance element is provided in the antenna substrate. In the resonant circuit, the inductance element is magnetically coupled to the electric power line. The resonant circuit transmits a radio-frequency signal superimposed on the electric power line to the modem. The resonant circuit also transmits a transmission signal from the modem to the electric power line. | 02-05-2009 |
20090052360 | INFORMATION TERMINAL DEVICE - An information terminal device includes a casing, a wireless board, and an antenna arranged to utilize a plurality of radio systems. The antenna includes a power feeding terminal and a plurality of resonant circuits. The plurality of resonant circuits are arranged to radiate radio waves. The plurality of resonant circuits further define a matching circuit that provides impedance matching between an impedance on a power feeding side as viewed from the power feeding terminal and a radiation impedance of a free space. | 02-26-2009 |
20090065594 | WIRELESS IC DEVICE AND WIRELESS IC DEVICE COMPOSITE COMPONENT - A wireless IC device includes a wireless IC chip, a feed circuit board having the wireless IC chip mounted thereon and including a feed circuit including inductance elements, and a radiation plate electromagnetically coupled to the inductance elements in the feed circuit. A high-permeability magnetic body made of a high-permeability magnetic material is provided in the feed circuit board and a portion of the inductance elements is provided in the high-permeability magnetic body. | 03-12-2009 |
20090066592 | SYSTEM FOR INSPECTING ELECTROMAGNETIC COUPLING MODULES AND RADIO IC DEVICES AND METHOD FOR MANUFACTURING ELECTROMAGNETIC COUPLING MODULES AND RADIO IC DEVICES USING THE SYSTEM - A system for inspecting an electromagnetic coupling module includes a radio IC chip and a feeder circuit board on which the radio IC chip is mounted, the feeder circuit board includes a feeder circuit including an inductance element. This inspecting system measures the electromagnetic coupling module by electromagnetically coupling a probe of a measuring device to the electromagnetic coupling module by at least one of electrostatic coupling and electromagnetic coupling. In addition, the electromagnetic coupling modules are manufactured using this inspecting system. | 03-12-2009 |
20090080296 | OPTICAL DISC - An optical disc includes an electromagnetic coupling module mounted therein. The electromagnetic coupling module includes a wireless IC chip and a feeder circuit substrate in which a feeder circuit including a resonant circuit having a predetermined resonant frequency is disposed. The electromagnetic coupling module is electromagnetically coupled to a reflective film defining a metal thin film of the optical disc, and the reflective film defines an antenna or radiation pattern of the electromagnetic coupling module. | 03-26-2009 |
20090109102 | ANTENNA AND RADIO IC DEVICE - An antenna includes a feeder terminal and a resonance circuit. The resonance circuit is defined by a capacitance element and an inductance element and includes first and second radiation plates. The capacitance element is electromagnetically coupled to the first radiation plate, and the inductance element is electromagnetically coupled to the second radiation plate. A radio IC device includes an electromagnetic coupling module including a feeder circuit substrate on which a radio IC chip is mounted, and radiation plates. The feeder circuit substrate includes an inductance element and a capacitance element. One of the radiation plates faces and is magnetically coupled to the inductance element. The other radiation plate faces and is electrically coupled to the capacitance element. The radio IC chip is operated by signals received by the radiation plates, and a response signal from the radio IC chip is radiated from the radiation plates. | 04-30-2009 |
20090121030 | WIRELESS IC DEVICE AND COMPONENT FOR WIRELESS IC DEVICE - A wireless IC device includes a cutout portion having no aluminum-deposited film that is provided at an end of an article package made of an aluminum-deposited laminated film, and an electromagnetic coupling module is provided at the cutout portion. The electromagnetic coupling module and the aluminum-deposited film of the package define a wireless IC device. A loop electrode, which is a magnetic field transmission auxiliary radiator of the electromagnetic coupling module, is coupled to the aluminum-deposited film of the package. Thus, the article package functions as a radiator of an antenna. | 05-14-2009 |
20090135079 | WIRELESS IC DEVICE AND COMPONENT FOR WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip, a power supply circuit board upon which the wireless IC chip is mounted, and in which a power supply circuit is provided, the power supply circuit includes a resonant circuit having a predetermined resonant frequency, and a radiation pattern, which is adhered to the underside of the power supply circuit board, for radiating a transmission signal supplied from the power supply circuit, and for receiving a reception signal to supply this to the power supply circuit. The resonant circuit is an LC resonant circuit including an inductance device and capacitance devices. The power supply circuit board is a multilayer rigid board or a single-layer rigid board, and between the wireless IC chip and the radiation pattern is connected by DC connection, magnetic coupling, or capacitive coupling. | 05-28-2009 |
20090146821 | WIRELESS IC DEVICE - A wireless-IC-device main component is disposed on a surface opposite to a surface for receiving signals from a reader/writer. The wireless-IC-device main component includes an insulating substrate, which is provided with a loop electrode and an electromagnetically coupled module coupled to the loop electrode. A signal from the reader/writer causes an eddy current to flow across a conductor principal plane of a metal article. The eddy current causes a magnetic field to be generated in a direction perpendicular or substantially perpendicular to the conductor principal plane of the metal article. Then, the loop electrode is coupled to the magnetic field. Thus, the wireless-IC-device main component functions as an RFID tag even for signals from the principal plane opposite to the wireless-IC-device main component. Thus, it is possible to reduce the cost of manufacturing a metal article, and to provide a wireless IC device using the metal article as a radiator. | 06-11-2009 |
20090153332 | TEST SYSTEM FOR RADIO FREQUENCY IC DEVICES AND METHOD OF MANUFACTURING RADIO FREQUENCY IC DEVICES USING THE SAME - A test system for a radio frequency IC device includes a radio frequency IC chip and a radiation strip. The characteristics of the radio frequency IC device are measured by bringing the tip of a probe of a test apparatus in direct contact with a portion of the radiation strip and thereby providing a radio frequency signal. The tip of the probe is made to be a flat plate so as to obtain closer and more stable contact with the radiation strip. | 06-18-2009 |
20090160619 | INDUCTIVELY COUPLED MODULE AND ITEM WITH INDUCTIVELY COUPLED MODULE - An inductively coupled module includes a wireless IC chip and a feeder circuit substrate which is connected to the wireless IC chip and which includes a feeder circuit including an inductance element and a capacitance element. The feeder circuit substrate is made of a biodegradable plastic so as to prevent a negative impact of the module on the environment and the human body. The inductively coupled module is adhered on a radiation plate and is used as a wireless IC device of an RFID system. | 06-25-2009 |
20090160719 | RADIO FREQUENCY IC DEVICE - A radio frequency IC device includes a radio frequency IC chip, a feeder circuit substrate, and a radiating plate. The feeder circuit substrate includes a feeder circuit that electrically connects to the radio IC chip and that includes a resonance circuit and/or a matching circuit including inductance elements. The feeder circuit substrate is bonded to the radiating plate, which radiates a transmission signal supplied from the feeder circuit and supplies a received signal to the feeder circuit. The inductance elements are arranged in spiral patterns wound in opposite directions and couple to each other in opposite phases. The radio frequency IC device is able to obtain a radio frequency IC device that is not susceptible to being affected by a usage environment, minimizes variations in radiation characteristics, and can be used in a wide frequency band. | 06-25-2009 |
20090166434 | ANTENNA DEVICE AND RADIO FREQUENCY IC DEVICE - An antenna device is arranged to transmit or receive a radio frequency communication signal to or from an external device such as a reader/writer, and is arranged such that an antenna resonance circuit including an antenna coil and a capacitor is connected to an additional resonance circuit including an inductor and a capacitor. A radio frequency IC device preferably includes the antenna device and a radio frequency IC. The antenna device is constructed such that a change in characteristics thereof caused by a change in the distance between a radio frequency IC device and a reader/writer is minimized, and the radio frequency IC device performs communication with high reliability. | 07-02-2009 |
20090179810 | ARTICLE HAVING ELECTROMAGNETIC COUPLING MODULE ATTACHED THERETO - An article having an electromagnetic coupling module attached thereto includes an electromagnetic coupling module and a PET bottle having the electromagnetic coupling module bonded thereto. The electromagnetic coupling module includes a wireless IC chip arranged to process transmission and reception signals and the feed circuit board having the wireless IC chip mounted thereon. The feed circuit board includes a feed circuit including a resonant circuit having a predetermined resonant frequency. The feed circuit performs characteristic impedance matching between the PET bottle and the wireless IC chip. The PET bottle functions as a radiator arranged to radiate a transmission signal supplied from the feed circuit using electromagnetic field coupling and to supply a received reception signal to the feed circuit using electromagnetic field coupling. | 07-16-2009 |
20090201117 | CONTAINER WITH ELECTROMAGNETIC COUPLING MODULE - A container includes an electromagnetic coupling module on an inner surface of a container main body and a radiator made of a metal material on an outer surface of the container main body. The electromagnetic coupling module includes a feeder circuit board, on which a radio IC chip is mounted and in which a feeder circuit including a resonant circuit that has a predetermined resonant frequency and includes an inductance element is provided. The electromagnetic coupling module and the radiator preferably transmit and receive high-frequency signals through electromagnetic coupling. The container thus has an electromagnetic coupling module that includes a radio IC chip that is resistant to a shock applied from the outside and an environmental change, realizes an easy arrangement of a radiator and the electromagnetic coupling module, provides a preferable radiation characteristic, and is suitably used in an RFID system. | 08-13-2009 |
20090201156 | WIRELESS IC DEVICE - A wireless IC device includes an electromagnetic coupler module including a wireless IC chip processing transmission and reception signals, and a feeder circuit board. In the wireless IC device, a first coupler defining a feeder circuit arranged on the feeder circuit board is electromagnetically coupled with a first mount of a first radiation plate, and a second coupler is electromagnetically coupled with a second mount of a second radiation plate. The couplers are respectively defined by line electrodes. Input and output terminal electrodes of the wireless IC chip are electrically connected to the line electrodes. The wireless IC chip is operated by the first and second couplers in response to a signal received by first and second radiation plates. A response signal from the wireless IC chip is radiated to the outside from the first and second radiation plates via the first and second couplers. | 08-13-2009 |
20090262041 | WIRELESS IC DEVICE - An electromagnetic coupling module includes a wireless IC chip and a functional substrate. The electromagnetic coupling module is mounted on a radiation plate, preferably using an adhesive, for example. On the upper surface of a base material of the radiation plate, two long radiation electrodes are provided. On the undersurface of the functional substrate, capacitive coupling electrodes that individually face inner ends of the radiation electrodes are provided. A matching circuit arranged to perform the impedance matching between the wireless IC chip and each of the radiation electrodes includes the capacitive coupling electrodes. As a result, it is possible to reduce the size, facilitate the design, and reduce the cost of a wireless IC device. | 10-22-2009 |
20090266900 | WIRELESS IC DEVICE AND ELECTRONIC APPARATUS - A wireless IC device that is miniaturized, allows simple and low-cost mounting of a wireless IC, and eliminates the possibility of damage occurring to the wireless IC due to static electricity, and an electronic apparatus equipped with the wireless IC device, includes a wireless IC chip that processes transmission and reception signals, and a feeder circuit substrate that includes a resonant circuit having an inductance element. Feeder electrodes are provided on a surface of the feeder circuit substrate and are electromagnetically coupled to the resonant circuit. The feeder electrodes and are electromagnetically coupled to radiation plates and provided for a printed wiring board. The wireless IC chip is activated by a signal received by the radiation plates and a response signal from the wireless IC chip is radiated outward from the radiation plates. | 10-29-2009 |
20090277966 | WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip arranged to process a transmission/received signal, a matching inductance element and a planar electrode which are provided on the surface of a feeder circuit board formed by a flexible dielectric, and a loop-shaped radiation plate provided on the undersurface of the feeder circuit board. Both ends of the radiation plate are coupled to a resonance circuit including an inductance element by electromagnetic field coupling. The wireless IC chip is operated using a signal received by the radiation plate. A response signal transmitted from the wireless IC chip is externally transmitted from the radiation plate. | 11-12-2009 |
20090277967 | WIRELESS IC DEVICE - A wireless IC device includes a radiating plate, a wireless IC chip, and a feeder circuit board, on which the wireless IC chip is mounted. The feeder circuit board includes a resonant circuit with an inductance element, and the resonant circuit is electromagnetically coupled with the radiating plate. The wireless IC chip is interposed between the radiating plate and the feeder circuit board. | 11-12-2009 |
20090278687 | WIRELESS IC DEVICE - A wireless IC device includes an electromagnetic coupling module, which includes a feeder circuit board having a wireless IC chip arranged to process transmission and reception signals mounted thereon, and a radiation plate. Linear loop electrodes provided in the radiation plate are electromagnetically coupled to planar electrodes located on a surface of the feeder circuit board. A signal received by the radiation plate drives the wireless IC chip. A response signal from the wireless IC chip is transmitted to the outside from the radiation plate. A frequency of the transmission and reception signals is substantially determined by inductance of the loop electrodes, capacitance between the loop electrodes and the planar electrodes, and stray capacitance generated between lines of the loop electrodes. | 11-12-2009 |
20090278760 | WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip; a feeder circuit board which has the wireless IC chip located thereon, is magnetically coupled to a radiation plate, supplies electric power to the wireless IC chip, and relays signals between the wireless IC chip and the radiation plate; and a substrate on which the feeder circuit board is placed. On the substrate, there are formed a plurality of positioning markers indicating the boundaries of a plurality of positioning areas in which the feeder circuit board is selectively placed. | 11-12-2009 |
20090302121 | WIRELESS IC DEVICE - A wireless IC device that is operable in a wide band and is suitable for RFID systems includes a radiating plate and an electromagnetically coupled module constituted by a wireless IC that processes transmitted/received signals and a feeding circuit board having a feeding circuit and coupled with the wireless IC. The radiating plate includes a linear electrode bent at a bent portion and apparently sectioned into two linear electrode portions having different lengths. The electromagnetically coupled module is arranged such that the feeding circuit board and the linear electrode portions are electromagnetically coupled. The wireless IC is operated by signals received by the radiating plate, and response signals from the wireless IC are radiated outward from the radiating plate. | 12-10-2009 |
20090302972 | PACKAGING MATERIAL WITH ELECTROMAGNETIC COUPLING MODULE - A packaging material includes an electromagnetic coupling module for an RFID system, in which a radio IC chip is protected from external shock and environmental change without affecting the planarity of the packaging material, the assembly including an electromagnetic coupling module is facilitated, and the radiation characteristics are satisfactory. A packaging material includes a liner and a wave-shaped core material, wherein an electromagnetic coupling module is arranged inside of the packaging material. The electromagnetic coupling module includes a radio IC chip and a feeder circuit board, on which the radio IC chip is mounted, the feeder circuit board including a resonant circuit that includes an inductance element. The packaging material is made of a dielectric, wherein the dielectric and the electromagnetic coupling module are electromagnetically coupled to transmit/receive high frequency signals. | 12-10-2009 |
20090305635 | PACKAGING MATERIAL WITH ELECTROMAGNETIC COUPLING MODULE - A packaging material with an electromagnetic coupling module for a RFID system, is constructed such that a radio IC chip is protected from external shock and environmental change without adversely affecting the planarity of the packaging material, the assembly of a radiator and an electromagnetic coupling module is facilitated, and the radiation characteristics are satisfactory. A packaging material includes a liner and a wave-shaped core material, wherein an electromagnetic coupling module and a radiator that are electromagnetically coupled to each other are arranged inside of the packaging material. The electromagnetic coupling module includes a radio IC chip and a feeder circuit board, on which the radio IC chip is mounted, the feeder circuit board including a resonant circuit that includes an inductance element. The radiator electromagnetically couples with the electromagnetic coupling module to transmit/receive high frequency signals. | 12-10-2009 |
20090308938 | WIRELESS IC DEVICE AND COMPONENT FOR WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip, a power supply circuit board upon which the wireless IC chip is mounted, and in which a power supply circuit is provided, the power supply circuit includes a resonant circuit having a predetermined resonant frequency, and a radiation pattern, which is adhered to the underside of the power supply circuit board, for radiating a transmission signal supplied from the power supply circuit, and for receiving a reception signal to supply this to the power supply circuit. The resonant circuit is an LC resonant circuit including an inductance device and capacitance devices. The power supply circuit board is a multilayer rigid board or a single-layer rigid board, and between the wireless IC chip and the radiation pattern is connected by DC connection, magnetic coupling, or capacitive coupling. | 12-17-2009 |
20090321527 | WIRELESS IC DEVICE AND MANUFACTURING METHOD THEREOF - A wireless IC device includes a radiation plate, a wireless IC chip, and a substrate provided with a feed circuit that includes a resonant circuit and/or the matching circuit including an inductance element and that is electromagnetically coupled to the radiation plate. The substrate is made of a resin material. A recess is provided in a first main surface of the substrate. The substrate is provided with a wiring electrode arranged along a bottom surface and an inner circumferential surface of the recess and the first main surface of the substrate and electrically connected to the feed circuit, and a wedge member made of a different material from the resin material and extending between the bottom surface of the recess and a second main surface of the substrate spaced apart from the wiring electrode. The wireless IC chip is mounted in the recess and coupled to the wiring electrode. | 12-31-2009 |
20100038437 | WIRELESS IC DEVICE - A wireless IC device has a structure such that the size of a radiation plate and a radiation characteristic may be determined irrespective of an impedance of a wireless IC chip. The wireless IC device includes a wireless IC chip that is arranged to process transmission and reception signals, a spiral matching inductance element and a plane electrode that are located on a surface of a feeder circuit substrate, and a coil-shaped radiation plate located on a radiation substrate. Plane electrodes connected to both ends of the radiation plate are electromagnetically coupled respectively to the inductance element and the plane electrode. The wireless IC chip is operated by a signal received by the radiation plate, and a response signal from the wireless IC chip is radiated outside from the radiation plate. | 02-18-2010 |
20100103058 | RADIO IC DEVICE - A radio IC device includes an electromagnetic coupling module includes a radio IC chip arranged to process transmitted and received signals and a feed circuit board including an inductance element. The feed circuit board includes an external electrode electromagnetically coupled to the feed circuit, and the external electrode is electrically connected to a shielding case or a wiring cable. The shielding case or the wiring cable functions as a radiation plate. The radio IC chip is operated by a signal received by the shielding case or the wiring, and the answer signal from the radio IC chip is radiated from the shielding case or the wiring cable to the outside. A metal component functions as the radiation plate, and the metal component may be a ground electrode disposed on the printed wiring board. | 04-29-2010 |
20100156563 | WIRELESS IC DEVICE AND COMPONENT FOR WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip, a power supply circuit board upon which the wireless IC chip is mounted, and in which a power supply circuit is provided, the power supply circuit includes a resonant circuit having a predetermined resonant frequency, and a radiation pattern, which is adhered to the underside of the power supply circuit board, for radiating a transmission signal supplied from the power supply circuit, and for receiving a reception signal to supply this to the power supply circuit. The resonant circuit is an LC resonant circuit including an inductance device and capacitance devices. The power supply circuit board is a multilayer rigid board or a single-layer rigid board, and between the wireless IC chip and the radiation pattern is connected by DC connection, magnetic coupling, or capacitive coupling. | 06-24-2010 |
20100237152 | WIRELESS IC DEVICE - An article package formed from, for example, an aluminum-evaporated laminated film includes a cut-out section, which has no aluminum-evaporated layer, in an edge. An electromagnetic-coupling module is disposed in the cut-out section. A wireless IC device is constituted by the electromagnetic-coupling module and an aluminum-evaporated layer of the package. A magnetic-field antenna of the electromagnetic-coupling module is coupled to the aluminum-evaporated layer of the package. The whole of the article package acts as a radiator of the antenna. | 09-23-2010 |
20100244215 | WIRELESS IC DEVICE - A wireless IC device includes a radiating plate, a wireless IC chip, and a feeder circuit board, on which the wireless IC chip is mounted. The feeder circuit board includes a resonant circuit with an inductance element, and the resonant circuit is electromagnetically coupled with the radiating plate. The wireless IC chip is interposed between the radiating plate and the feeder circuit board. | 09-30-2010 |
20100283694 | COMPOSITE ANTENNA - A composite antenna achieves favorable radiation characteristics and favorable communication performance, and can be used in short distance communication as well as long distance communication. The composite antenna includes a dipole antenna having an elongated shape, a loop antenna including at least one pair of opposing end portions, and a connection portion arranged to connect the dipole antenna and a point of the loop antenna at which the amplitude of a current flowing in the loop antenna has a maximum value. The dipole antenna performs long distance communication utilizing an electric field, and the loop antenna performs short distance communication utilizing a magnetic field. This composite antenna may be used as a wireless IC device in RFID systems. | 11-11-2010 |
20100302013 | RADIO FREQUENCY IC DEVICE AND RADIO COMMUNICATION SYSTEM - A radio frequency IC device achieves impedance matching between a radio IC chip and a radiation plate in a wide frequency band, and achieves desired radiation characteristics over a wide range of frequencies. A radio frequency IC device and a radio communication system allow both long-distance and short-distance communication and, in particular, allow short-distance communication using a small amount of energy. The radio frequency IC device includes an electromagnetic coupling module including a radio IC chip and a feed circuit board, and a radiation plate. An annular electrode is arranged to be coupled to both a feed circuit of the electromagnetic coupling module and the radiation plate. The radiation plate defines an electric-field radiation plate for long-distance communication, while the annular electrode defines a magnetic-field radiation plate for short-distance communication. The feed circuit board may be removed, so that the radio IC chip is coupled to the annular electrode directly or with an interposer disposed therebetween. | 12-02-2010 |
20100308118 | WIRELESS IC DEVICE, ELECTRONIC APPARATUS, AND METHOD FOR ADJUSTING RESONANT FREQUENCY OF WIRELESS IC DEVICE - A wireless IC device and an electronic apparatus are obtained, which can achieve miniaturization and improve the gain of a radiator plate (electrode) without providing a dedicated antenna. A wireless IC device is provided, in which a loop electrode is provided in a ground electrode provided on a printed wiring circuit board, and in which a wireless IC chip that processes a transmission/reception signal or an electromagnetic coupling module is coupled to the loop electrode. The ground electrode is coupled to the wireless IC chip or the electromagnetic coupling module via the loop electrode, and transmits or receives a high-frequency signal. The ground electrode is formed with a slit for adjusting a resonant frequency thereof. | 12-09-2010 |
20100314455 | WIRELESS IC DEVICE - A wireless IC device improves radiation characteristics or directivity of signals and reliably communicates with a reader/writer. The wireless IC device includes an electromagnetically coupled module includes a wireless IC device and a feed circuit substrate, a protective layer, a first radiation plate, and a second radiation plate. The feed circuit substrate includes a feed circuit including inductance elements. The feed circuit is electrically connected to the wireless IC chip and coupled to the radiation plates. Signals received by the radiation plates are provided to the wireless IC chip via the feed circuit. Signals from the wireless IC chip are provided to the radiation plates via the feed circuit and then radiated to the outside. | 12-16-2010 |
20110024510 | WIRELESS IC DEVICE - A wireless IC device prevents deviations of the resonant frequency from the desired value. An antenna coil has an end portion positioned in a connector provided on the negative-most side in the z-axis direction and an end portion positioned in a connector provided on the positive-most side in the z-axis direction. A wireless IC is electrically connected to the end portions. A via hole conductor is provided between the end portion and the wireless IC and penetrates through a plurality of insulator layers. A via hole conductor is provided in the antenna coil such that the length of a current path thereto from the end portion is the shortest among a plurality of via hole conductors. The distance between the via hole conductor and the via hole conductor is larger than the distances between the penetrating via hole conductor and the via hole conductors. | 02-03-2011 |
20110031320 | WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip arranged to process a radio signal, a power-supply circuit board that is connected to the wireless IC chip and that includes a power supply circuit including at least one coil pattern, and a radiation plate arranged to radiate a transmission signal supplied from the power-supply circuit board and/or receiving a reception signal to supply the reception signal to the power-supply circuit board. The radiation plate includes an opening provided in a portion thereof and a slit connected to the opening. When viewed in plan from the direction of the winding axis of the coil pattern, the opening in the radiation plate overlaps with an inner area of the coil pattern and the area of the inner area is approximately the same as that of opening. | 02-10-2011 |
20110049249 | WIRELESS IC DEVICE AND METHOD OF MANUFACTURING THE SAME - A wireless IC device includes a plurality of insulating sheets that are stacked on top of one another. Coil electrodes are arranged so as to sandwich the insulating sheets therebetween and define an antenna coil by being connected to one another. The coil electrodes are superposed with one another and thereby define a single ring when viewed in plan from a z-axis direction. | 03-03-2011 |
20110062244 | COMPONENT OF WIRELESS IC DEVICE AND WIRELESS IC DEVICE - A component of a wireless IC device includes a wireless IC chip and a feeding circuit substrate including a plurality of laminated resin layers. The wireless IC chip is included inside the feeding circuit substrate, and an annular electrode is arranged inside the feeding circuit substrate. The component of a wireless IC device and the radiation plate define the wireless IC device. | 03-17-2011 |
20110073664 | WIRELESS IC DEVICE AND MANUFACTURING METHOD THEREOF - A wireless IC device includes a radiation plate, a wireless IC chip, and a substrate provided with a feed circuit that includes a resonant circuit and/or the matching circuit including an inductance element and that is electromagnetically coupled to the radiation plate. The substrate is made of a resin material. A recess is provided in a first main surface of the substrate. The substrate is provided with a wiring electrode arranged along a bottom surface and an inner circumferential surface of the recess and the first main surface of the substrate and electrically connected to the feed circuit, and a wedge member made of a different material from the resin material and extending between the bottom surface of the recess and a second main surface of the substrate spaced apart from the wiring electrode. The wireless IC chip is mounted in the recess and coupled to the wiring electrode. | 03-31-2011 |
20110074584 | RADIO FREQUENCY IC DEVICE AND ELECTRONIC APPARATUS - A radio frequency IC device includes a radio frequency IC chip arranged to process a transmitted/received signal, a printed circuit board on which the radio frequency IC chip is mounted, an electrode arrange on the circuit board, and a loop electrode that is arranged on the circuit board so that the loop electrode is electrically connected to the radio frequency IC chip and is coupled to the electrode by electromagnetic coupling. The electrode is coupled to the radio frequency IC chip via the loop electrode so as to transmit or receive a high-frequency signal. A power supply circuit board including a resonance circuit and/or a matching circuit may be disposed between the radio frequency IC chip and the loop electrode. | 03-31-2011 |
20110127337 | WIRELESS IC DEVICE AND ELECTRONIC APPARATUS - A wireless IC device that is miniaturized, allows simple and low-cost mounting of a wireless IC, and eliminates the possibility of damage occurring to the wireless IC due to static electricity, and an electronic apparatus equipped with the wireless IC device, includes a wireless IC chip that processes transmission and reception signals, and a feeder circuit substrate that includes a resonant circuit having an inductance element. Feeder electrodes are provided on a surface of the feeder circuit substrate and are electromagnetically coupled to the resonant circuit. The feeder electrodes and are electromagnetically coupled to radiation plates and provided for a printed wiring board. The wireless IC chip is activated by a signal received by the radiation plates and a response signal from the wireless IC chip is radiated outward from the radiation plates. | 06-02-2011 |
20110155810 | ANTENNA DEVICE AND RADIO FREQUENCY IC DEVICE - An antenna device is arranged to transmit or receive a radio frequency communication signal to or from an external device such as a reader/writer, and is arranged such that an antenna resonance circuit including an antenna coil and a capacitor is connected to an additional resonance circuit including an inductor and a capacitor. A radio frequency IC device preferably includes the antenna device and a radio frequency IC. The antenna device is constructed such that a change in characteristics thereof caused by a change in the distance between a radio frequency IC device and a reader/writer is minimized, and the radio frequency IC device performs communication with high reliability. | 06-30-2011 |
20110186641 | RADIO IC DEVICE - A radio IC device that is highly efficient in transmitting signals from a radio IC to a radiation pattern includes a radio IC chip arranged to processes radio signals, an auxiliary electrode pattern that is connected to the radio IC chip and includes a loop-shaped electrode, and a radiation electrode pattern that includes a magnetic-field radiation electrode having a resonant frequency and an electric-field radiation electrode having a resonant frequency. The loop-shaped electrode of the auxiliary electrode pattern is coupled to a maximum-voltage section of the magnetic-field radiation electrode through a capacitor. | 08-04-2011 |
20110254752 | RADIO FREQUENCY IC DEVICE - A radio frequency IC device includes a radio frequency IC chip, a feeder circuit substrate, and a radiating plate. The feeder circuit substrate includes a feeder circuit that electrically connects to the radio IC chip and that includes a resonance circuit and/or a matching circuit including inductance elements. The feeder circuit substrate is bonded to the radiating plate, which radiates a transmission signal supplied from the feeder circuit and supplies a received signal to the feeder circuit. The inductance elements are arranged in spiral patterns wound in opposite directions and couple to each other in opposite phases. The radio frequency IC device is able to obtain a radio frequency IC device that is not susceptible to being affected by a usage environment, minimizes variations in radiation characteristics, and can be used in a wide frequency band. | 10-20-2011 |
20120056001 | OPTICAL DISC - An optical disc includes an electromagnetic coupling module mounted therein. The electromagnetic coupling module includes a wireless IC chip and a feeder circuit substrate in which a feeder circuit including a resonant circuit having a predetermined resonant frequency is disposed. The electromagnetic coupling module is electromagnetically coupled to a reflective film defining a metal thin film of the optical disc, and the reflective film defines an antenna or radiation pattern of the electromagnetic coupling module. | 03-08-2012 |
20120217312 | WIRELESS IC DEVICE AND ELECTRONIC APPARATUS - A wireless IC device that is miniaturized, allows simple and low-cost mounting of a wireless IC, and eliminates the possibility of damage occurring to the wireless IC due to static electricity, and an electronic apparatus equipped with the wireless IC device, includes a wireless IC chip that processes transmission and reception signals, and a feeder circuit substrate that includes a resonant circuit having an inductance element. Feeder electrodes are provided on a surface of the feeder circuit substrate and are electromagnetically coupled to the resonant circuit. The feeder electrodes and are electromagnetically coupled to radiation plates and provided for a printed wiring board. The wireless IC chip is activated by a signal received by the radiation plates and a response signal from the wireless IC chip is radiated outward from the radiation plates. | 08-30-2012 |
20120223148 | WIRELESS IC DEVICE - A wireless-IC-device main component is disposed on a surface opposite to a surface for receiving signals from a reader/writer. The wireless-IC-device main component includes an insulating substrate, which is provided with a loop electrode and an electromagnetically coupled module coupled to the loop electrode. A signal from the reader/writer causes an eddy current to flow across a conductor principal plane of a metal article. The eddy current causes a magnetic field to be generated in a direction perpendicular or substantially perpendicular to the conductor principal plane of the metal article. Then, the loop electrode is coupled to the magnetic field. Thus, the wireless-IC-device main component functions as an RFID tag even for signals from the principal plane opposite to the wireless-IC-device main component. Thus, it is possible to reduce the cost of manufacturing a metal article, and to provide a wireless IC device using the metal article as a radiator. | 09-06-2012 |
20120235871 | ANTENNA DEVICE AND RADIO FREQUENCY IC DEVICE - An antenna device is arranged to transmit or receive a radio frequency communication signal to or from an external device such as a reader/writer, and is arranged such that an antenna resonance circuit including an antenna coil and a capacitor is connected to an additional resonance circuit including an inductor and a capacitor. A radio frequency IC device preferably includes the antenna device and a radio frequency IC. The antenna device is constructed such that a change in characteristics thereof caused by a change in the distance between a radio frequency IC device and a reader/writer is minimized, and the radio frequency IC device performs communication with high reliability. | 09-20-2012 |
20120262357 | ANTENNA DEVICE AND METHOD OF SETTING RESONANT FREQUENCY OF ANTENNA DEVICE - 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 and blocks 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. Accordingly, the magnetic flux generates relatively large loops linking the inside and the outside of a coil conductor of an antenna on a reader/writer side. | 10-18-2012 |
20120292396 | WIRELESS IC DEVICE AND COMPONENT FOR WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip, a power supply circuit board upon which the wireless IC chip is mounted, and in which a power supply circuit is provided, the power supply circuit includes a resonant circuit having a predetermined resonant frequency, and a radiation pattern, which is adhered to the underside of the power supply circuit board, for radiating a transmission signal supplied from the power supply circuit, and for receiving a reception signal to supply this to the power supply circuit. The resonant circuit is an LC resonant circuit including an inductance device and capacitance devices. The power supply circuit board is a multilayer rigid board or a single-layer rigid board, and between the wireless IC chip and the radiation pattern is connected by DC connection, magnetic coupling, or capacitive coupling. | 11-22-2012 |
20120292397 | WIRELESS IC DEVICE AND COMPONENT FOR WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip, a power supply circuit board upon which the wireless IC chip is mounted, and in which a power supply circuit is provided, the power supply circuit includes a resonant circuit having a predetermined resonant frequency, and a radiation pattern, which is adhered to the underside of the power supply circuit board, for radiating a transmission signal supplied from the power supply circuit, and for receiving a reception signal to supply this to the power supply circuit. The resonant circuit is an LC resonant circuit including an inductance device and capacitance devices. The power supply circuit board is a multilayer rigid board or a single-layer rigid board, and between the wireless IC chip and the radiation pattern is connected by DC connection, magnetic coupling, or capacitive coupling. | 11-22-2012 |
20120305657 | WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip arranged to process a radio signal, a power-supply circuit board that is connected to the wireless IC chip and that includes a power supply circuit including at least one coil pattern, and a radiation plate arranged to radiate a transmission signal supplied from the power-supply circuit board and/or receiving a reception signal to supply the reception signal to the power-supply circuit board. The radiation plate includes an opening provided in a portion thereof and a slit connected to the opening. When viewed in plan from the direction of the winding axis of the coil pattern, the opening in the radiation plate overlaps with an inner area of the coil pattern and the area of the inner area is approximately the same as that of opening. | 12-06-2012 |
20130113662 | ANTENNA DEVICE AND METHOD OF SETTING RESONANT FREQUENCY OF ANTENNA DEVICE - 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 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 large loops that link the inside and the outside of a coil conductor of an antenna on a reader/writer side to couple an antenna device and the antenna on the reader/writer side. | 05-09-2013 |
20130134228 | ELECTROMAGNETIC-COUPLING-MODULE-ATTACHED ARTICLE - An electromagnetic-coupling module including a radio IC chip and a feeder circuit board on which the radio IC chip is mounted and a feeder circuit including a resonant circuit having a predetermined resonant frequency is attached to an article. The article has a radiation element that radiates a transmission signal supplied from the feeder circuit of the electromagnetic-coupling module via electromagnetic coupling and that supplies a received reception signal to the feeder circuit via the electromagnetic coupling. | 05-30-2013 |
20130234905 | ANTENNA DEVICE AND METHOD OF SETTING RESONANT FREQUENCY OF ANTENNA DEVICE - 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 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 large loops that link the inside and the outside of a coil conductor of an antenna on a reader/writer side to couple an antenna device and the antenna on the reader/writer side. | 09-12-2013 |
20130300622 | ANTENNA DEVICE AND METHOD OF SETTING RESONANT FREQUENCY OF ANTENNA DEVICE - 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 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 large loops that link the inside and the outside of a coil conductor of an antenna on a reader/writer side to couple an antenna device and the antenna on the reader/writer side. | 11-14-2013 |
20130334321 | RADIO IC DEVICE - A radio IC device includes an electromagnetic coupling module includes a radio IC chip arranged to process transmitted and received signals and a feed circuit board including an inductance element. The feed circuit board includes an external electrode electromagnetically coupled to the feed circuit, and the external electrode is electrically connected to a shielding case or a wiring cable. The shielding case or the wiring cable functions as a radiation plate. The radio IC chip is operated by a signal received by the shielding case or the wiring, and the answer signal from the radio IC chip is radiated from the shielding case or the wiring cable to the outside. A metal component functions as the radiation plate, and the metal component may be a ground electrode disposed on the printed wiring board. | 12-19-2013 |
20140042231 | WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip arranged to process a radio signal, a power-supply circuit board that is connected to the wireless IC chip and that includes a power supply circuit including at least one coil pattern, and a radiation plate arranged to radiate a transmission signal supplied from the power-supply circuit board and/or receiving a reception signal to supply the reception signal to the power-supply circuit board. The radiation plate includes an opening provided in a portion thereof and a slit connected to the opening. When viewed in plan from the direction of the winding axis of the coil pattern, the opening in the radiation plate overlaps with an inner area of the coil pattern and the area of the inner area is approximately the same as that of opening. | 02-13-2014 |
20140138450 | WIRELESS IC DEVICE - A wireless IC device includes a wireless IC chip arranged to process a radio signal, a power-supply circuit board that is connected to the wireless IC chip and that includes a power supply circuit including at least one coil pattern, and a radiation plate arranged to radiate a transmission signal supplied from the power-supply circuit board and/or receiving a reception signal to supply the reception signal to the power-supply circuit board. The radiation plate includes an opening provided in a portion thereof and a slit connected to the opening. When viewed in plan from the direction of the winding axis of the coil pattern, the opening in the radiation plate overlaps with an inner area of the coil pattern and the area of the inner area is approximately the same as that of opening. | 05-22-2014 |
20140159974 | ANTENNA DEVICE AND METHOD OF SETTING RESONANT FREQUENCY OF ANTENNA DEVICE - 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. | 06-12-2014 |
20140319224 | WIRELESS IC DEVICE - An electromagnetic coupling module includes a wireless IC chip and a functional substrate. The electromagnetic coupling module is mounted on a radiation plate, preferably using an adhesive, for example. On the upper surface of a base material of the radiation plate, two long radiation electrodes are provided. On the undersurface of the functional substrate, capacitive coupling electrodes that individually face inner ends of the radiation electrodes are provided. A matching circuit arranged to perform the impedance matching between the wireless IC chip and each of the radiation electrodes includes the capacitive coupling electrodes. As a result, it is possible to reduce the size, facilitate the design, and reduce the cost of a wireless IC device. | 10-30-2014 |