Kabushiki Kaisha Toshiba

Advanced Space Communications Research Laboratory (asc)

Bushiki Kaisha Toshiba

Hiroki Shoki

Shuichi Obayashi

Kiyoshi Toshimitsu

Kuniaki Ito

Takayoshi Ito

Syuichi Sekine

Shuichi Sekine

Ren Sakata

Tomoko Adachi

Hiroshi Yoshida

Tsuguhide Aoki

Mutsumu Serizawa

Ichiro Seto

Hiroshi Tsurumi

Tetsu Shijo

Kenichirou Ogawa

Takehiko Toyoda

Yasushi Murakami

Naoko Ono

Ryoko Matsuo

Hiroki Kudo

Yukako Tsutsumi

Akihiro Tsujimura

Hidehiro Matsuoka

Noriaki Oodachi

Shoji Otaka

Akiko Yamada

Hiroaki Ishihara

Manabu Mukai

Kohei Onizuka

Yutaka Asanuma

Fumi Moritsuka

Yasuo Suzuki

Takafumi Yamaji

Minoru Namekata

Hideo Kasami

Daisuke Takeda

Makoto Higaki

Noritaka Deguchi

Ippei Kashiwagi

Hisao Iwasaki

Noriaki Odachi

Minoru Okumura

Tokihiko Yokoi

Yasuhiko Yamasa

A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.

Power transmitting apparatus, power receiving apparatus, control apparatus, and wireless power transfer system

In one embodiment, a coil includes a magnetic core and a winding. The magnetic core includes at least one block provided with a groove or an opening. Each block is arranged so as to make the groove or the opening extend along a direction of magnetic flux. The coil is used as a power transmitting coil or a power receiving coil.

Coil, power receiving apparatus, and power transmitting apparatus

A power transmission system according to an embodiment includes a transmitting device and a receiving device. The transmitting (receiving) device includes a transmitting (receiving) housing and a transmitting (receiving) coil. The transmitting (receiving) housing includes a first transmitting (receiving) surface and a second transmitting (receiving) surface. The transmitting (receiving) coil includes a first transmitting (receiving) part and a second transmitting (receiving) part. A first facing area and a second facing area at the reference position are set such that change of strength of magnetic coupling between the transmitting coil and the receiving coil of when the receiving device is moved in a direction perpendicular to the first transmitting surface becomes smaller than change of strength of magnetic coupling between the transmitting coil and the receiving coil of when the receiving device is moved in a direction perpendicular to the second transmitting surface.

Transmitting device, receiving device, and power transmission system

There is provided a power transmitting apparatus including: a power supply, a power transmitting inductor, a mutual coupling adjusting unit and a control unit, in which the power supply supplies AC power, the power transmitting inductor transfers the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus, the mutual coupling adjusting unit adjusts a relative position between the power transmitting inductor and the power receiving inductor, and the control unit controls the mutual coupling adjusting unit, based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.

A loop antenna includes: a pair of first linear elements, a feed point connected with each of the first linear elements, a first variable impedance element, one end of which is connected with one end of the first linear elements, a second variable impedance element, one end and the other end of which are electrically connected with the other end of the first variable impedance element and the other end of the first linear elements, and a second linear element, one end and the other end of which are electrically connected with the other end of the first variable impedance element and the other end of the first linear elements. A self-resonance coil receives power fed to the feed point of the loop antenna and transmits the received power to a receiving self-resonance coil.

Wireless power transmitting device and wireless power receiving device

According to one embodiment, a radio device includes: a mounting board having a conductive plane; a semiconductor package mounted on the mounting board and having a interposer having a conductive plane, a semiconductor chip mounted on one surface of the interposer, and an antenna having a conductive element formed on the one surface and connected to the semiconductor chip; and a plurality of connection portions connecting the mounting board and the interposer. A first electrical length of the first connection portion which is nearest the conductive element among the plurality of connection portions or a second electrical length of the first connection portion including a conductive plane of the mounting board or interposer connected to the first connection portion is less than &#xbd; wavelength of the operating frequency of the antenna.

Radio device

There is provided a radio power transmitting apparatus including: a power transmitting coil, a band signal generating unit, a reflected signal measuring unit, an oscillator and a communication control unit. The coil is supplied with a signal and transmits the signal to a power receiving coil on a radio power receiving apparatus through magnetic coupling. The generating unit generates a band signal having an allowable transmission band and supplies the band signal to the power transmitting coil. The reflected signal measuring unit measures a reflected signal of the band signal from the power transmitting coil. The oscillator generates a carrier signal having a controllable oscillating frequency. The control unit determines a transmission frequency based on a frequency characteristic of the reflected signal and performs control so that a transmission signal generated by modulating the carrier signal of the transmission frequency is supplied to the power transmitting coil.

Radio power transmitting apparatus and radio power transmitting system

An antenna device of an embodiment includes: an antenna having a feeding point and an end portion apart from the feeding point, the end portion being an open end; a variable impedance matching circuit connected to the antenna at the feeding point; a probe placed in such a position that the distance from the end portion to a tip of the probe is equal to or shorter than one eighth of the wavelength corresponding to the maximum radio frequency used in the antenna device; and a controller that is connected to the probe, and controls the variable impedance matching circuit, based on an electrical signal measured with the probe.

Antenna device and wireless communication apparatus

A transformer between waveguide and transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes a first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (&#x3bb;g/2) from each other. One of the feed pins has a second distance of approximately (&#x3bb;g*(1+2&#x3b1;)/4) from the third metal plane. '&#x3bb;g' is a wavelength in the waveguide and '&#x3b1;' is an integer which is equal or larger than &#x201c;0&#x201d;. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. &#x201c;a&#x201d; is length of the waveguide along the third metal wall.

Transmission line to waveguide transformer having differential feed pins spaced a common distance from a closed waveguide wall

A transformer between a waveguide and a transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (&#x3bb;g/2) from each other. One of the feed pins has a second distance of approximately (&#x3bb;g*(1+2&#x3b1;)/4) from the third metal plane. '&#x3bb;g' is a wavelength in the waveguide and '&#x3b1;' is an integer which is equal or larger than &#x201c;0&#x201d;. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. &#x201c;a&#x201d; is length of the waveguide along the third metal wall.

Slot antenna device including a transmission line to waveguide transformer having differential feed pins

A measurement apparatus includes an anechoic chamber, a DUT board, rotation units, and a feeding arm. The anechoic chamber has inner-walls. Each inner-wall is covered with a radio wave absorber. One of the inner-wall is a first wall with an aperture and the other inner-walls are second walls. The DUT board holds a first antenna to be measured with radiation property and a probe to detect a signal from the first antenna. A part of the DUT board is inserted into the anechoic chamber through the aperture opened in the first wall. One end of the feeding arm holds a second antenna radiating a radio wave to the first antenna in the anechoic chamber. Each rotation unit provides on each second wall and is selectively attached to the other end of the feeding arm for rotating the second antenna and for feeding to the second antenna.

Measurement apparatus and method thereof

A mobile communications terminal includes positional information generator configured to generate positional information indicating a current position of the terminal, receiver which receives identification information sent from the base station of the second mobile communication network, notification information generator configured to generate notification information including the identification information and the positional information generated at the time of receiving the identification information, and transmitter which transmits the notification information to the service area calculation apparatus via the first mobile communication network to derive the information concerning the service area.

Mobile communications terminal, service area calculation apparatus and method of calculating service area

An apparatus used in a first mobile communication system with a plurality of wireless base stations, the first mobile communication system operated by a first provider, the apparatus including an acquiring unit, a location detecting unit configured to detect a present location of the apparatus, a storing unit configured to store first service location information with respect to the first provider, and a location information providing unit configured to calculate locally a location of the plurality of wireless base stations using the detected present location of the apparatus stored in the storing unit. The location information providing unit is configured to provide a user with information based on the first service location information and the second service location information.

Apparatus and method for mapping a location of wireless base stations in a mobile communication system

A wireless communication system which transmits and receives a signal by using a plurality of wireless apparatuses, comprising: a first wireless apparatus group having a plurality of transmitting apparatuses, each transmitting a wireless signal based on a first control signal, said first wireless apparatus group forming a first ad-hoc network between said transmitting apparatuses; and a second wireless apparatus group having a plurality of destination apparatuses, each receiving the wireless signal transmitted from said first wireless apparatus group, said second wireless apparatus group transmitting and receiving the wireless signal received by said destination apparatuses based on a second control signal, and said second wireless apparatus group forming a second ad-hoc network between said destination apparatuses different from said first ad-hoc network.

Wireless communication and wireless communication apparatus

One of objects of a wireless communication apparatus according to the present invention is to realize stable communication regardless of received signal strength indication and information amount. The wireless communication apparatus for communicating in an autonomous distributed wireless network includes a detection unit which generates a detection signal by detecting a first wireless signal from a first wireless apparatus; a wireless circuit which receives a second wireless signal relating to said first wireless signal, transmitted from a second wireless apparatus which received said first wireless signal; a signal estimation unit which estimates said detection signal and the received second wireless signal; a signal selector which selects either said detection signal or the received second wireless signal, based on an estimation result of said signal estimation unit; and a demodulator which demodulates the signal selected by said signal selector.

Wireless communication apparatus and method of wireless communication

Growing community of inventors

Kawasaki, Japan

Hiroki Shoki