Patent application number | Description | Published |
20120208606 | ANTENNA AND MOBILE TERMINAL - An antenna that suppresses deterioration of communication performance depending on an angle with respect to a reading surface of a reader/writer includes a rectangular spiral coil conductor provided on a flexible substrate. The flexible substrate includes an aperture in a winding center portion of the coil conductor. A magnetic sheet penetrates the aperture of the flexible substrate. An antenna coil is provided near an end of a circuit board. A first conductor portion and a second conductor portion of the coil conductor are provided at positions opposing each other across the aperture. A portion of the magnetic sheet close to the second conductor portion is bent in a direction to get close to the circuit board. | 08-16-2012 |
20120306714 | ANTENNA APPARATUS AND COMMUNICATION TERMINAL - An antenna apparatus includes a power supply coil, a booster electrode sheet, a magnetic sheet, and a ground substrate arranged in this order from the top. The power supply coil includes a spiral coil conductor located on a flexible substrate. The booster electrode sheet includes a booster electrode located on an insulating substrate. The booster electrode includes a conductor region covering the coil conductor, a conductor aperture covering a coil window, and a slit portion connecting the outer edge of the conductor region and the conductor aperture in plan view. The magnetic sheet covers the booster electrode sheet so that the magnetic sheet covers a region slightly larger than a region including the conductor aperture and the slit portion of the booster electrode. | 12-06-2012 |
20130099994 | ANTENNA APPARATUS AND COMMUNICATION TERMINAL INSTRUMENT - In an antenna apparatus, a first current is induced in a first booster conductor by a current flowing through a coil conductor of a power feed antenna, and the first current circulates along a circumference of the first booster conductor. A second current is induced in a second booster conductor by the current flowing through the coil conductor of the power feed antenna, and the second current circulates along a circumference of the second booster conductor. A third current is induced in the first booster conductor by the second current flowing through the second booster conductor, and the third current circulates along the circumference of the first booster conductor. Thus, the antenna apparatus is much less influenced by nearby metallic objects and a shape of an included radiation plate may be more freely determined without requiring a highly accurate positional relationship between the radiation plate and the coil conductor. | 04-25-2013 |
20130147670 | COMMUNICATION TERMINAL DEVICE - An RFID antenna is arranged in the vicinity of a metal portion of and on an outer surface side of a casing of a communication terminal device. The RFID antenna includes a magnetic core, and a coil conductor that is wound around the magnetic core. The coil conductor includes a first conductor portion positioned on a first main surface side of the magnetic core and a second conductor portion positioned on the second main surface side of the magnetic core and arranged at a different position than the first conductor portion when viewed in plan from the direction of the first and second main surfaces, and the coil conductor is arranged such that the first main surface side of the magnetic core is on the metal portion side and such that the first conductor portion of the coil conductor faces a leading end portion of the casing. | 06-13-2013 |
20130307746 | ANTENNA DEVICE AND WIRELESS COMMUNICATION DEVICE - An antenna device includes a feed coil and a sheet conductor. The feed coil includes a magnetic core and a coil-shaped conductor, which is provided around the magnetic core. An RFIC is connected to the feed coil. The sheet conductor has a larger area than the feed coil. A slit that extends from a portion of the edge of the sheet conductor toward the inner side of the sheet conductor is provided in the sheet conductor. The feed coil is arranged such that the direction of the axis around which the feed coil is disposed is parallel or substantially parallel to the directions in which the sheet conductor extends. The feed coil is arranged such that the feed coil is close to the slit and one of coil openings at the ends of the feed coil faces the slit. | 11-21-2013 |
20140043196 | ANTENNA DEVICE, WIRELESS COMMUNICATION DEVICE, AND METHOD OF MANUFACTURING ANTENNA DEVICE - In an antenna device, first linear portions of a coil conductor are located on a lower surface of a first resin sheet. Second linear portions of the coil conductor are located on an upper surface of a second resin sheet. Via conductors of the coil conductor are formed in the first and second resin sheets and intermediate resin sheets located between the first and second resin sheets. The via conductors connect a first end and a second end of the first linear portions and a first end and a second end of the second linear portions, respectively. The first and second linear portions and the via conductors define the coil conductor. Each of the intermediate resin sheets includes an aperture in the center portion thereof. The lamination of the apertures defines a cavity in which a magnetic substance core is embedded. The coil conductor is wound around a periphery of the cavity. | 02-13-2014 |
20140176382 | ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS - An antenna device includes a feed coil connected to a feed circuit, and a coil antenna disposed near the feed coil. A ferrite sheet, in which a magnetic loss term in a usable frequency band is relatively large, is provided between the feed coil and the coil antenna. The feed coil and the coil antenna are magnetically coupled to each other via the ferrite sheet. With this configuration, signal transmission efficiency between the feed coil and the coil antenna is enhanced. | 06-26-2014 |
20140176383 | COIL ANTENNA DEVICE AND ANTENNA MODULE - In a coil antenna device, a multilayer structure includes non-magnetic sheets and magnetic sheets stacked on each other. A coil conductor is provided in the multilayer structure such that a portion of the magnetic material defines a magnetic core and such that a coil axis extends along a principle surface of the multilayer structure. The coil conductor includes a plurality of line conductors each of which extends on one principle surface side of the magnetic material, a plurality of line conductors each of which extends on the other principle surface side of the magnetic material, and a plurality of via-hole conductors extending in a thickness direction of the multilayer structure so as to be surrounded with the magnetic material. The plurality of via-hole conductors defines a coiled structure together with the line conductors. | 06-26-2014 |
20140176384 | ANTENNA DEVICE AND COMMUNICATION TERMINAL DEVICE - An antenna device includes a power feed coil antenna connected to a power feed circuit, and a booster coil antenna including wound coil conductors and disposed so as to be electromagnetically coupled to the power feed coil antenna. The power feed coil antenna includes a first coil antenna and a second coil antenna each including a coil conductor, and the coil conductors of the first and second coil antennas are connected in phase with each other. The first coil antenna is disposed such that the winding axis of the coil conductor of the first coil antenna extends perpendicularly or substantially perpendicularly to the winding axis of the booster coil antenna, and such that at least a portion of the first coil antenna overlaps the coil conductor of the booster coil antenna as viewed in plan. The second coil antenna is disposed in the vicinity of the coil conductors such that the winding axis of the coil conductor of the second coil antenna extends in parallel with the winding axis of the booster coil antenna, and such that at least a portion of a coil opening of the second coil antenna does not overlap the coil conductors of the booster coil antenna as viewed in plan. | 06-26-2014 |
20140184462 | ANTENNA MODULE AND RADIO COMMUNICATION DEVICE - An antenna module includes a first coil conductor, a second coil conductor and a magnetic layer. The first coil conductor and the second coil conductor are arranged with a magnetic layer interposed therebetween so that a coil aperture of the first coil conductor and a coil aperture of the second coil conductor are opposed to each other in alignment. An inner end portion of the first coil conductor and an inner end portion of the second coil conductor are electrically connected. The first coil conductor and the second coil conductor are connected to each other so that directions of magnetic fluxes generated in coil-wound axis directions of the first coil conductor and the second conductor are mutually opposite to each other. A magnetic flux φ entering a metal body in a perpendicular direction thereto flows in a lateral direction of the magnetic layer. | 07-03-2014 |
20140203976 | MAGNETIC ANTENNA, ANTENNA DEVICE, AND ELECTRONIC APPARATUS - A magnetic antenna includes a plurality of magnetic layers, coil conductor patterns wound around the magnetic layers about a winding axis in a direction perpendicular or substantially perpendicular to a stacking direction of the magnetic layers, a dielectric layer stacked on an outer layer of the magnetic layers, and a conducting pattern provided with the dielectric layer and coupled with a ground. The conducting pattern and the coil conductor patterns disposed along the outer layer are arranged such that at least a portion of the coil conductor patterns faces the conducting pattern and defines a stray capacitor therewith. | 07-24-2014 |
20140203981 | ANTENNA DEVICE AND COMMUNICATION TERMINAL DEVICE - An antenna device includes a first conductor plane and a second conductor plane that face each other. The first conductor plane and the second conductor plane are electrically continuous through a first connection conductor, a second connection conductor, and a chip capacitor. A power feed coil is disposed between the first conductor plane and the second conductor plane. The power feed coil includes a magnetic core and a coil conductor. The coil conductor defines a pattern such that the coil conductor winds around the magnetic core. The power feed coil is disposed at a position closer to the first connection conductor and magnetically couples with the first connection conductor. | 07-24-2014 |
20140203986 | ANTENNA DEVICE ANTENNA MODULE - An antenna device includes a multilayer body as a base body, an antenna coil, and a capacitor chip. The multilayer body includes a magnetic layer including a first main surface and a second main surface, a first non-magnetic layer provided on the first main surface of the magnetic layer, and a second non-magnetic layer provided on the second main surface of the magnetic layer. The antenna coil includes a first coil pattern provided with the first non-magnetic layer and a second coil pattern provided with the second non-magnetic layer. The capacitor chip is connected to the antenna coil and provided on the second non-magnetic layer. | 07-24-2014 |
20140203991 | ANTENNA DEVICE AND COMMUNICATION TERMINAL DEVICE - An antenna device includes a planar conductor, a coiled antenna element, and a feed coil. The feed coil includes a coil conductor wound around a magnetic core. The planar conductor includes a ground conductor provided with a printed wiring substrate. In a portion of a circumferential portion of the planar conductor, a coupling portion is provided and defined by an aperture and a slit. In a planar view of the antenna element, at least a portion of the coil aperture of the feed coil and a portion of the aperture overlap with each other. In addition, at least a portion of the coil aperture of the feed coil and a portion of the coil aperture of the antenna element overlap with each other. | 07-24-2014 |
20140203992 | ANTENNA DEVICE, FEED ELEMENT, AND COMMUNICATION TERMINAL DEVICE - An antenna device includes a conductor surface in which an opening having an open edge portion in communication with the outside is provided, a feed element including a first coil connected to the feed element and a second coil magnetically coupled to the first coil, a first mounting portion disposed in the open edge portion and connected to a first end of the second coil, and a second mounting portion disposed in the open edge portion in a state isolated from the first mounting portion and connected to a second end of the second coil. The first mounting portion and the conductor surface are directly or indirectly conducted to each other, and the second mounting portion and the conductor surface are directly or indirectly conducted to each other. A loop is defined around the opening through the first mounting portion, the second mounting portion, and the second coil. | 07-24-2014 |
20140217183 | ANTENNA DEVICE AND COMMUNICATION APPARATUS - An antenna device is configured as a jacket of a communication terminal, such as a mobile terminal, and a communication apparatus includes the antenna device attached to the communication terminal. The antenna device uses an HF-band high frequency signal as a carrier frequency, and is configured as a reader/writer antenna device for a near field communication system. The base body of the antenna device is a plate-shaped base member made of a resin. An antenna coil and a feeding coil are provided integrally with the plate-shaped base member. High-frequency signals are transmitted between the feeding coil and the antenna coil through magnetic coupling in a non-contact manner. | 08-07-2014 |
20140231518 | WIRELESS COMMUNICATION DEVICE - A wireless communication device includes a resistive-element-including RFIC and an antenna coil. The resistive-element-including RFIC includes an RFIC, a capacitive element, and resistive elements. The resistive elements and a portion of a circuit in the RFIC define a variable impedance circuit. The RFIC controls the impedance of a resistive circuit added to an antenna circuit in accordance with certain IO terminals set as output ports or input ports, thus obtaining a Q value of the antenna circuit in accordance with a communication speed. | 08-21-2014 |
20140253404 | ANTENNA DEVICE AND RADIO COMMUNICATION APPARATUS - An antenna device includes a multilayer body including magnetic layers or dielectric layers that are stacked, a first coil conductor that has a winding axis extending in a direction perpendicular or substantially perpendicular to a stacking direction of the multilayer body, the first coil conductor being provided in the multilayer body, and a second coil conductor that has a winding axis extending in a direction perpendicular or substantially perpendicular to the winding axis of the first coil conductor, the second coil conductor being provided in the multilayer body. | 09-11-2014 |
20150018055 | FLEXIBLE BOARD AND ELECTRONIC DEVICE - A flexible board includes a flexible body and a linear conductor. The flexible body includes a first main surface and a second main surface. The linear conductor is provided at the flexible body so as to be located closer to the first main surface than to the second main surface. The flexible body is valley-folded along a line crossing the linear conductor such that the first main surface is located inside of the fold, and is mountain-folded along a line crossing the linear conductor such that the first main surface is outside of the fold. An average radius of curvature in an area where the flexible body is mountain-folded is greater than an average radius of curvature in an area where the flexible body is valley-folded. | 01-15-2015 |
20150035718 | ANTENNA DEVICE AND WIRELESS COMMUNICATION APPARATUS - A plurality of first linear sections in a coil conductor are disposed on a lower surface of a first resin sheet. A plurality of second linear sections in the coil conductor are disposed on an upper surface of a second resin sheet. A plurality of via conductors in the coil conductor are disposed in the resin sheets. The coil conductor including the linear sections and the via conductors constitutes an antenna section. A first ground conductor is disposed on the lower surface of a third resin sheet. A second ground conductor is disposed on the upper surface of a fourth resin sheet. The first ground conductor and the second ground conductor are connected to each other by a interlayer connection conductor including a plurality of via conductors. The interlayer connection conductor does not define a closed loop surrounding the coil conductor. | 02-05-2015 |
20150036303 | HIGH-FREQUENCY SIGNAL TRANSMISSION LINE AND ELECTRONIC DEVICE - A high-frequency signal transmission line includes a dielectric element assembly including a plurality of dielectric layers laminated on each other, a linear signal line provided at the dielectric element assembly, and a first ground conductor provided on a first side in a direction of lamination relative to the signal line and including a plurality of openings arranged along the signal line. The dielectric layer positioned at an end of the first side in the direction of lamination includes an undulating portion provided on a first principal surface located on the first side in the direction of lamination, such that the undulating portion overlaps with the openings when viewed in a plan view in the direction of lamination. | 02-05-2015 |
20150087353 | HIGH-FREQUENCY SIGNAL LINE AND MANUFACTURING METHOD THEREOF - A high-frequency signal line includes a linear signal line and a first ground conductor provided at a dielectric body to extend along the dielectric body. The first ground conductor includes a first main surface and a second main surface opposed to each other in a direction of lamination. A strip-shaped protrusion extending along the signal line is provided on the second main surface of the first ground conductor. | 03-26-2015 |