Patent application number | Description | Published |
20080252551 | COIL ANTENNA AND PORTABLE ELECTRONIC APPARATUS - Coil units including windings are disposed on opposite sides across a virtual center line that is substantially perpendicular to a direction of positional displacement of a portable electronic apparatus that is to be disposed close to a reader/writer. The windings are connected in series through a conductor such that winding directions of the windings are the same. A difference in the communication performance between a case where the portable electronic apparatus is brought closer to a central portion of the reader/writer and a case where the portable electronic apparatus is brought closer to a position that is deviated from the central portion of the reader/writer can be reduced. In particular, even in a case where the portable electronic apparatus is brought closer to a peripheral portion of the reader/writer, a predetermined maximum possible communication range can be ensured. | 10-16-2008 |
20090096694 | ANTENNA DEVICE - An antenna device having a magnetic core to be surface-mounted on a circuit substrate includes a pair of coil portions spaced apart from each other at a predetermined interval. The coil portions are connected by a connecting conductor. An end of the magnetic core includes a curved or bent portion curved toward the circuit substrate. This structure defines an RFID antenna device having an improved receiving sensitivity that can be surface-mounted without increasing the thickness of a casing of a mobile electronic device. | 04-16-2009 |
20090121955 | ANTENNA COIL AND ANTENNA DEVICE - An antenna coil is obtained by winding a flexible substrate around a magnetic core. Conductors are provided on the flexible substrate, whereby a first coil portion and a second coil portion are provided on either side of the magnetic core except for in a middle portion. A non-winding portion including no conductors is provided between the first coil portion and the second coil portion on a main surface of the magnetic core. | 05-14-2009 |
20090189729 | ANTENNA COIL AND ANTENNA DEVICE - A flexible substrate is wound around a magnetic core to define an antenna coil. A receiver coil including a first receiver coil portion and a second receiver coil portion which have opposite winding directions, and a transmitter coil including a first transmitter coil portion and a second transmitter coil portion which have opposite winding directions are provided on the flexible substrate. A region in which the receiver coil is provided and a region in which the transmitter coil is provided at least partially overlap each other when viewed in plan view, and non-coil-wound portions are provided between the first coil portions and second coil portions in the coils. | 07-30-2009 |
20090295664 | ANTENNA COIL MOUNTED TO BOARD AND ANTENNA DEVICE - An antenna device is constructed such that an antenna coil including a magnetic core and a flexible substrate is mounted to a circuit board. A first coil portion having a coil axis parallel or substantially parallel with a main surface of the magnetic core includes a first coil and a third coil. A second coil portion includes a second coil and a fourth coil. A conductor-free portion is located between the first and second coil portions. The flexible substrate includes a projection, and first to fourth coil connections are drawn out at the projection. The antenna device is constructed such that each of the coils is connected on the circuit board by connecting to a conductor pattern on the circuit board at the projection of the flexible substrate. | 12-03-2009 |
20100053014 | MAGNETIC ANTENNA AND ANTENNA DEVICE - A highly sensitive magnetic antenna and an antenna device achieve strong coupling with magnetic flux substantially perpendicular to main surfaces of a magnetic core, an enlarged antenna opening, and increased efficiency of magnetic flux radiation. The magnetic antenna includes a flexible substrate and a magnetic core preferably having a substantially rectangular plate shape. The flexible substrate has a spiral coil conductor located thereon, and the coil conductor has a conductor opening located at the center of the winding center thereof. The flexible substrate is bent in the vicinity of the two sides of the coil conductor spaced apart from the center of the conductor opening and along the two sides of the magnetic core, so as to wrap around the upper surface, left and right surfaces, and portions of the lower surface of the magnetic core. | 03-04-2010 |
20100164823 | PORTABLE ELECTRONIC DEVICE - A portable electronic device includes a circuit board and an antenna coil installed on the circuit board. The antenna coil includes a magnetic core and a coil wound at either side of an unwound portion. The winding direction of the coil is changed at either side of the unwound portion. When the length of the magnetic core is defined as X and the distance between two intersecting points at which a virtual line formed by projecting the central line of the magnetic core onto the circuit board intersects the outer periphery of the circuit board is defined as Y, the antenna coil satisfies Y≧X≧0.8Y. | 07-01-2010 |
20110012803 | ANTENNA COIL TO BE MOUNTED ON A CIRCUIT BOARD AND ANTENNA DEVICE - In an antenna coil including a first magnetic core, a second magnetic core, and a flexible board, coil conductors are provided on a surface of the flexible board. By winding the flexible board around the first magnetic core and the second magnetic core, a first coil portion is disposed around the first magnetic core, and a second coil portion is disposed around the second magnetic core. The winding direction of the second coil portion is opposite to that of the first coil portion. The first coil portion and the second coil portion are connected to define one coil as a whole. | 01-20-2011 |
20110156978 | ANTENNA DEVICE - An antenna device having a magnetic core to be surface-mounted on a circuit substrate includes a pair of coil portions spaced apart from each other at a predetermined interval. The coil portions are connected by a connecting conductor. An end of the magnetic core includes a curved or bent portion curved toward the circuit substrate. This structure defines an RFID antenna device having an improved receiving sensitivity that can be surface-mounted without increasing the thickness of a casing of a mobile electronic device. | 06-30-2011 |
20110241958 | ANTENNA COIL TO BE MOUNTED ON A CIRCUIT BOARD AND ANTENNA DEVICE - In an antenna coil including a first magnetic core, a second magnetic core, and a flexible board, coil conductors are provided on a surface of the flexible board. By winding the flexible board around the first magnetic core and the second magnetic core, a first coil portion is disposed around the first magnetic core, and a second coil portion is disposed around the second magnetic core. The winding direction of the second coil portion is opposite to that of the first coil portion. The first coil portion and the second coil portion are connected to define one coil as a whole. | 10-06-2011 |
20120112978 | ANTENNA DEVICE - An antenna device having a magnetic core to be surface-mounted on a circuit substrate includes a pair of coil portions spaced apart from each other at a predetermined interval. The coil portions are connected by a connecting conductor. An end of the magnetic core includes a curved or bent portion curved toward the circuit substrate. This structure defines an RFID antenna device having an improved receiving sensitivity that can be surface-mounted without increasing the thickness of a casing of a mobile electronic device. | 05-10-2012 |
20120188139 | ANTENNA COIL - An antenna coil includes a magnetic layer such as a flat magnetic sheet, a transmission coil portion defined by a coiled conductor, a reception coil portion defined by a coiled conductor, a transmission coil connection defined by the conductor and defining a portion of the transmission coil portion, and a reception coil connection defined by the conductor and defining a portion of the reception coil portion. The transmission coil portion and the reception coil portion are at least partly formed side by side on the magnetic layer and are arranged to be connected to a wiring pattern on an external circuit. | 07-26-2012 |
20130249758 | ANTENNA COIL TO BE MOUNTED ON A CIRCUIT BOARD AND ANTENNA DEVICE - In an antenna coil including a first magnetic core, a second magnetic core, and a flexible board, coil conductors are provided on a surface of the flexible board. By winding the flexible board around the first magnetic core and the second magnetic core, a first coil portion is disposed around the first magnetic core, and a second coil portion is disposed around the second magnetic core. The winding direction of the second coil portion is opposite to that of the first coil portion. The first coil portion and the second coil portion are connected to define one coil as a whole. | 09-26-2013 |