Sony Corporation

Felica Networks, Inc.

Kiyotada Yokogi

Kenji Asakura

Satoru Maeda

Masatoshi Hayakawa

Shuichi Sekiya

Shuichi Goto

Katsutoshi Sakao

Shogo Kawata

Suguru Sekita

Yoshimi Takahashi

Noriyuki Uchiumi

Katsuhiro Onozuka

Tomoya Oguni

An information processing device is provided. The information processing device including a communication antenna having a variable Q value, for performing contactless-type communication with an external device by using a communication path capable of transmitting and receiving a signal using a carrier of a predetermined frequency, a communication speed determining unit for determining a communication speed in the communication with the external device, and a communication controlling unit for allowing the Q value of the communication antenna to be set to a value corresponding to a determined communication speed based on the communication speed determined in the communication speed determining unit.

Information processing device, communication control method and program

There is provided a communication apparatus including a voltage detection unit for detecting an antenna end voltage of a reader or a non-contact type IC card when non-contact communicating using a load modulation of the non-contact type IC card with respect to a magnetic field signal from the reader/writer; and a characteristics control unit for changing characteristics of the antenna of the reader/writer or the non-contact type IC card when the antenna end voltage detected by the voltage detection unit reaches a predetermined first threshold value.

Communication apparatus and method of controlling antenna characteristics

An antenna for receiving electromagnetic waves in a desired frequency band, includes a radiating conductor and a ground conductor, a feeder part, a wavelength-shortening section, and a magnetic field applying section. The radiating conductor and a ground conductor resonate at a resonance point frequency. The feeder part is configured to feed the radiating conductor with electricity. The wavelength-shortening section in which a magnetic body having both a dielectric property and a magnetic property is disposed close to the radiating conductor shifts the resonance point frequency into a band lower than the desired frequency band by a wavelength-shortening effect obtained based on the dielectric property and the magnetic property. The magnetic field applying section is configured to apply a magnetic field to the magnetic body so as to reduce a magnetic loss due to the magnetic body.

Antenna structure including radiating conductor and magnetic material having dielectric property

Disclosed herein is an antenna device including, a radiator having a feeder, and a planar reflector spaced from the radiator in a radio wave incoming direction, the reflector having at least one slit defined in a side edge thereof.

Antenna device, antenna reflector, and wireless communication unit incorporating antenna

A battery pack is provided which includes an antenna coil for generating a magnetic field, a battery cell and a positive pole terminal and a negative pole terminal electrically connected with the battery cell, wherein a resultant of superimposing current from the battery cell or current to the battery cell and a signal from the antenna coil or a signal to the battery is sent from the positive pole terminal or the negative pole terminal, or received from the positive pole terminal or the negative pole terminal.

Battery pack and information processing apparatus

The present invention provides a system composed of a monitor unit including a display and being driven by a battery and a base unit for transmitting image information to the monitor unit, which system is capable of charging the battery for driving the monitor unit without the need of provision of any special charging unit. The monitor unit has a configuration that a battery is mounted on a back surface portion and a stand is contained in the back surface portion, and also a groove portion is formed in a bottom surface and a charge terminal is provided in the groove portion. The base unit has a configuration that a holding rail is formed in a lower portion of a front surface portion and a charge terminal is provided on the holding rail. In the case of charging the battery, the monitor unit is stood against the front surface portion of the base unit in such a manner that the stand is contained in the stand containing groove portion and the holding rail of the base unit is inserted in the groove portion of the bottom surface of the monitor unit. A rib for pressing the battery onto the battery mounting portion located on one end side of the battery containing groove portion is formed on the back surface of the battery cover.

Monitor device, base device and information terminal device

A diversity antenna apparatus and method adaptable for use with communication equipment is provided which can assure an acceptable transmission and/or reception condition in three principal dimensional (X,Y,Z) directions. The diversity antenna apparatus may comprise a plurality of antennae for transmitting and/or receiving a circularly polarized wave and an antenna selection circuit which selects one of the antennae for transmission and/or reception based on information representative of reception levels of the antennae. A first group of the antennae may provide a first substantially semispherical radiation pattern and a second group of the antennae may provide a second substantially semispherical radiation pattern such that the first and second groups of antennae as a whole provide a substantially spherical radiation pattern.

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Tokyo, Japan

Kiyotada Yokogi