Patent application number | Description | Published |
20120325916 | RFID MODULE AND RFID DEVICE - An RFID module includes an RFIC element, a filter circuit, a matching circuit, and a radiating element. The filter circuit and the matching circuit define an RFID device. The filter circuit includes a first inductance element, a second inductance element, and a capacitor. The first inductance element and the second inductance element are of equal inductance, and are strongly magnetically coupled to each other so as to strengthen magnetic fluxes to each other. With this configuration, an RFID module and an RFID device that include a filter circuit to remove harmonic components of the RFIC element but are not large as a whole are constructed. | 12-27-2012 |
20130229319 | ANTENNA DEVICE AND COMMUNICATION TERMINAL APPARATUS - An antenna device includes a base including a planar conductor disposed thereon, and a coil antenna. The coil antenna includes a coil conductor wound around a magnetic core. The coil antenna is arranged such that a coil opening of the coil conductor is closed to an edge of the planar conductor. A current passing through the coil conductor induces a current in the planar conductor. Thus, a first magnetic flux occurs in the coil antenna, and a second magnetic flux occurs in the planar conductor. Therefore, a third magnetic flux occurs in an area of the planar conductor. Accordingly, the antenna device achieves a small footprint, a small-sized communication terminal apparatus and a desired communication distance. | 09-05-2013 |
20140198011 | ANTENNA DEVICE AND WIRELESS COMMUNICATION APPARATUS - An antenna device includes a feeding coil antenna and a booster coil antenna electromagnetically coupled to the feeding coil antenna. The feeding coil antenna includes a plurality of coil portions including at least one magnetic body and each including a coil conductor wound around the at least one magnetic body. The plurality of coil portions are connected to one another in an in-phase mode, and are arranged near one another such that winding axes of the coil conductors are oriented approximately in the same direction and at least portions of respective openings of the coil conductors face one another. | 07-17-2014 |
20140203985 | COIL ANTENNA AND COMMUNICATION TERMINAL DEVICE - To ensure a sufficient communication distance and to concurrently suppress a conductor loss, a coil antenna includes a magnetic core including a first peripheral surface including at least a first principal surface, a first coil conductor located on the first principal surface and wound around a predetermined winding axis, a first base material layer stacked on the first principal surface, including at least a first surface parallel or substantially parallel to the first principal surface, and made of a material having a lower magnetic permeability than the magnetic core, and a second coil conductor located on at least the first surface. Opposite ends of the second coil conductor are coupled to the first coil conductor on the first principal surface, and a direction in which a current flows through the first coil conductor on the first principal surface is substantially the same as a direction in which a current flows through the second coil conductor on the first surface. | 07-24-2014 |
20140218262 | ANTENNA DEVICE AND WIRELESS COMMUNICATION APPARATUS - In order to increase flexibility regarding a disposition of an antenna coil and to enable a hot spot to be provided at a desired position, an antenna device includes a main coil antenna and a sub-coil antenna connected to the main coil antenna. A coil opening of the sub-coil antenna and a coil opening of the main coil antenna are arranged side by side in plan view so that the main coil antenna and the sub-coil antenna are magnetically coupled to each other. The main coil antenna and the sub-coil antenna are wound so as to generate magnetic fields having opposite phases. | 08-07-2014 |
20140247188 | ANTENNA DEVICE AND ELECTRONIC APPARATUS INCLUDING ANTENNA DEVICE - An antenna device includes a casing including a metal casing portion and a feed coil. The metal casing portion includes a main surface, a side surface connected to the main surfaces, and a notch portion located in the side surface. The feed coil is disposed inside the casing to be coupled with the metal casing portion by a magnetic field, and includes a winding central portion forming a coil opening portion. The feed coil is disposed near the notch portion, with the coil opening portion directed to a region including the notch portion. | 09-04-2014 |
20150207205 | INTERFACE AND COMMUNICATION DEVICE - An antenna of a communication terminal is disposed on a side on which a bottom surface of a reflective plate, which is included in a display, is present. When the reflective plate is irradiated by an LED light source, the antenna cannot be seen from the side on which a display screen of the display is disposed. Accordingly, an antenna coil of the antenna does not need transparent electrodes and can be made of various materials each having a high conductivity. Therefore, the antenna has high sensitivity, low manufacturing cost, and very efficiently performs near field communication with an external device located on the display screen side of the display. | 07-23-2015 |
20150256228 | POWER RECEPTION DEVICE, POWER TRANSMISSION DEVICE, AND POWER TRANSMISSION SYSTEM - An active electrode and a passive electrode are electrically field-coupled with an active electrode and a passive electrode provided in a power transmission device, respectively. Power in a high frequency voltage excited on the active electrode and the passive electrode is supplied to a mobile unit via a step-down transformer, a rectification smoothing circuit, and a DC-DC converter. A CPU turns off switches when wireless communication is carried out. The passive electrode functions as a booster antenna that is magnetically field-coupled with an antenna coil. A high frequency signal outputted from an RF circuit is transmitted via the antenna coil and the passive electrode, and a high frequency signal transmitted from the power transmission circuit is inputted, via the passive electrode and the antenna coil, to the RF circuit. | 09-10-2015 |