Abstract: According to one embodiment, a wireless device includes a circuit board, a semiconductor chip, a nonconductive layer, and a conductive film. The semiconductor chip includes a transmitting/receiving circuit and is mounted on the circuit board. The nonconductive layer is to seal the semiconductor chip. The conductive film is to cover a surface of the nonconductive layer, the conductive film being provided with a plurality of apertures serving as radiating elements. At least one aperture of the plurality of apertures is fed with power.

Abstract: According to one embodiment, a apparatus includes a coil, a clock generator, an echo transmitter, a carrier generator, a clock transmitter, a regenerator, an receiver, a reconstructor, a detector, and a controller. The echo transmitter generates and transmits an echo transmission signal synchronously with a clock signal generated by the clock generator to wirelessly transmit an echo signal output from the col. The carrier generator generates a carrier signal have a frequency within a variable range. The clock transmitter wirelessly transmits a clock transmission signal. The regenerator regenerates the clock signal based on the transmitted clock transmission signal. The receiver extracts the echo signal synchronously with the regenerated clock signal from the transmitted echo transmission signal. The detector detects a frequency of an interference wave.

Abstract: According to one embodiment, a wireless communication apparatus includes a wireless unit and a control unit. The wireless unit is configured to set, for each period, a transmit state including a first period for transmitting a connection request to establish connection or a receive state including a second period for receiving a connection request and to transmit or receive a signal, both lengths of the first period and the second period being equal. The control unit is configured to control the wireless unit to operate in one of a transmit mode, a receive mode and a transceive mode. The control unit causes the wireless unit to operate in the receive mode or the transceive mode before a trigger signal is externally input, and to operate in the transmit mode if the trigger signal is input.

Abstract: A wireless device has a first information acquisition part to acquire first information when the wireless device passes through a first gate, a second information generator to generate second information necessary to acquire data, by using the first information, and a data acquisition part to acquire the data transmitted from a data providing apparatus through wireless communication, by using the second information.

Abstract: A wireless device has a first information acquisition part to acquire first information when a first gate is passed through, a second information generator to generate second information by using the first information, a third information acquisition part to acquire third information by a wireless communication using the second information and invalidate the third information after a predetermined time period is elapsed since the third information is acquired, and a service executing part to execute a service by using the third information. An area capable of acquiring the third information by the third information acquisition part is broader than an area capable of acquiring the first information by the first information acquisition part.

Abstract: According to one embodiment, a wireless device includes a circuit board, a semiconductor chip, a sealing resin, a conductive film, and an antenna element. The semiconductor chip includes a transmitting/receiving circuit and is mounted on the circuit board. The sealing resin seals the semiconductor chip. The conductive film covers a first surface portion of the sealing resin. An aperture is formed in a portion of the conductive film that corresponds to a second surface portion of the sealing resin other than the first surface portion, and the second surface portion is included in a side surface of the sealing resin and closest to an antenna terminal connected to the antenna element.

Abstract: According to the embodiments, a semiconductor package includes a semiconductor chip, a first conductive layer, a second conductive layer, and a power feeder. The semiconductor chip is provided on a substrate, is sealed with a resin, and contains a transmission/reception circuit. The first conductive layer is grounded and covers a first region on a surface of the resin. The second conductive layer is not grounded and covers a second region on the surface of the resin other than the first region. A power feeder electrically connects the semiconductor chip to the second conductive layer.

Abstract: According to one embodiment, a wireless device includes a board, a semiconductor chip, a radiation element, a sealing resin, a conductive layer, and a first conductive wall. The semiconductor chip is mounted on the board and includes a transmission/reception circuit. The radiation element is formed on the board. The sealing resin seals the semiconductor chip. The conductive layer covers at least a portion of a surface of the sealing resin. The first conductive wall is provided between the semiconductor chip and the radiation element and is connected to the conductive layer.

Abstract: A wireless communication device has a first wireless unit, a second wireless unit, a storage, a communication judging unit, a threshold value retaining unit configured to retain a threshold value used to judge whether or not to permit a switch from the first wireless unit to the second wireless unit, a remaining volume monitoring unit configured to judge, when the communication judging unit judges that the first wireless unit has disconnected communication, whether volume of remaining unreceived data to be incorporated into the data received by the first wireless unit before the disconnection of communication is smaller than the threshold value retained by the threshold value retaining unit, and a controller configured to start receiving the unreceived data by switching from the first wireless unit to the second wireless unit, when the volume of remaining unreceived data is judged to be small by the remaining volume monitoring unit.

Abstract: A wireless communication device has a plurality of wireless units each configured to cover a different wireless communication range and be capable of receiving data in the corresponding wireless communication range, a status information generator provided corresponding to the wireless unit utilized to receive data among the plurality of wireless units, in order to generate status information concerning the wireless communication range of the wireless unit utilized to receive the data, and a storage configured to store the status information in association with the data.

Abstract: A magnetic resonance imaging apparatus includes a probe unit and a control/imaging unit. The probe unit includes a converter converting a sampled magnetic-resonance signal into a digital signal, a first transmitter converting the digital signal into a first-radio signal, a first receiver receiving and performing detection on the second-radio signal to obtain a first-received signal, and a clock-regeneration unit regenerating a clock component from the first-received signal to generate a regenerated-clock signals. The control/imaging unit includes a second-receiver receiving the first-radio signal to obtain a second-received signal, a data processor performing data processing on the second-received signal in synchronism with a reference-clock signal to obtain a video signal, and a second transmitter which modulates a carrier wave using the reference-clock signal, converts the reference-clock signal into the second-radio signal, and transmits the second-radio signal through the second-wireless channel.

Abstract: A wireless communication device has a power receiving wireless communication unit configured to receive power and perform wireless communication utilizing the power, a storage unit configured to store a portion of the power, and a first wireless communication unit configured to perform wireless communication faster and more efficiently than the power receiving wireless communication unit by utilizing the power stored in the storage unit, when amount of the power stored in the storage unit exceeds a first reference level. The power receiving wireless communication unit includes a power receiver configured to receive power and supply a portion of the power to the storage unit, and a second wireless communication unit configured to perform wireless communication slower and less efficiently than the first wireless communication unit by utilizing the power received by the power receiver.

Abstract: A wireless communication device has a first wireless communication unit configured to wirelessly communicate with an external network, a management information storage configured to store application management information received through the first wireless communication unit, a second wireless communication unit configured to wirelessly communicate with an external communication device, and a management unit configured to control, based on the application management information stored in the management information storage, information wirelessly transmitted and received between the second wireless communication unit and the external communication device.

Abstract: A radio communication method includes generating a first transmit RF signal and a second transmit RF signal from a data signal to be transmitted. Each of the first and second transmit RF signals have a power spectrum in symmetric shape in the frequency domain. The first transmit RF signal and the second transmit RF signal are transmitted at a different time. The first transmit RF signal and the second transmit RF signal are received to generate a first received RF signal and a second received RF signal. The data signal from the first received RF signal and the second received RF signal are reproduced.

Abstract: A transmitter includes first generator to generate pilot source signal by modulating pilot sequence, second generator to generate data source signal with time length longer than that of pilot source signal by modulating data sequence, first cyclic shifter to perform cyclic shift of first shift amount to pilot source signal to generate first pilot signal, second cyclic shifter to performs cyclic shift of second shift amount to data source signal to generate first data signal, third cyclic shifter to perform cyclic shift of third shift amount to pilot source signal to generate second pilot signal, fourth cyclic shifter to perform cyclic shift of fourth shift amount to data source signal to generate second data signal, first transmit antenna to transmit first pilot signal and first data signal, and second transmit antenna to transmit second pilot signal and second data signal.

Abstract: According to an embodiment, a card device connected to a device includes a wireless communication unit configured to make wireless communication. The wireless communication unit includes an antenna configured to be arranged therein as being apart from at least one of side faces of the card device by a distance corresponding to not less than a wavelength of a wireless signal that is emitted from the wireless communication unit.

Abstract: In an embodiment, an electronic apparatus is mounted with a card unit including first and second devices driven with different driving voltages. The electronic apparatus includes: first and second voltage generating units, first and second control units. The first voltage generating unit generates a first driving voltage for driving the first device and a second driving voltage for driving the second device using electric power from the battery. The second voltage generating unit generates the first driving voltage and second driving voltage using electric power transmitted from the external device. The first control unit controls the first selection unit such that any one of the first driving voltage generated by the first voltage generating unit and the first driving voltage generated by the second voltage generating unit is selected depending on the electric power supply capability of the battery.

Abstract: According to one embodiment, a card device includes an authentication unit, a wireless communication unit, and a control unit. The authentication unit performs an authentication process with an external device via wired communication. The wireless communication unit performs wireless communication with the external device. The control unit controls the wireless communication unit to reduce radio waves radiated from the wireless communication unit when the control unit detects that the authentication process is being performed.

Abstract: According to one embodiment, a storage device includes a connector configured to be connected to an equipment; a wireless communication unit configured to transmit and receive data through wireless communication; an identification unit configured to identify the equipment connected to the connector; a storage unit configured to include, for each identified equipment, a restricted area accessible only by the identified equipment; and a controller configured to control the storage unit such that the data, which is received by the wireless communication unit when the equipment is connected to the connector, is written in the restricted area for the connected equipment.

Abstract: According to one embodiment, a wireless transceiver system includes a transmitter and a receiver. The transmitter includes a first generator, a second generator, a third generator. The second generator generates fixed data item that has bit values corresponding to the clock signal. The third generator performs OFDM modulation for the fixed data item. The receiver includes a first detector, a second detector, a PLL, a controller. The first detector is configured to detect an envelope that indicates amplitude in a time waveform. The controller is configured to control to operate the PLL from a first time point when the head part is detected to a second time point when a first period is elapsed.