Fujikura Limited

International Business Machines Corporation

Advanced Telecommunications Research Institute International

Kabushiki Kaisha Hoky

Kabushiki Kaisha Hoky (aka Hoky Corp.)

Kiyoshi Kobayashi

Bodhisatwa Sadhu

Ning Guan

Arun Paidimarri

Yo Yamaguchi

Alberto Valdes Garcia

Jean-Olivier Plouchart

Xiaoxiong Gu

Ken Sakuma

Fumio Suzuki

Christian Wilhelmus Baks

Yoshiharu Fujisaku

Mark Yeck

Atsuhiko Niwa

Masayuki Ariyoshi

Yafei Hou

Takahiro Maeda

Satoshi Tsukamoto

A phased array antenna () includes: a plurality of antenna elements (to); a plurality of signal paths (Rand R) that are connected to each of the antenna elements; a storage unit (M) configured to store a set values of at least one of amplitudes or phases of a signal passed through at least one predefined reference path among the plurality of signal paths with regard to at least one of the antenna elements, and an amplitude and phase control unit (or) configured to control at least one of the amplitude or the phase of the signal passed through the reference path connected to the antenna element by using the set value stored in the storage unit, and configured to control amplitude or phase of signal passed through the signal path other than the reference path.

Phased array antenna

A frequency converter up-converts a transmission signal in an intermediate frequency hand into a signal in a wireless frequency hand as a USB or an LSR of a local oscillation signal using the local oscillation signal. When PMhigh−1/2×IFwid≤RFtx≤PMhigh−1/2×CHwid, the frequency converter is configured to satisfy ωLO=PMhigh−1/2×Fwid−IFcent and IFtx=RFtx−ωLO. Alternatively, when PMlow+1/2×IFwid≥RFtx≥PMlow+1/2×CHwid, the frequency converter is configured to satisfy ωLO=PMlow+1/2×IFwid+IFcent and IFtx=ωLO−RFtx.

Frequency converter and wireless device

A phased array antenna includes an antenna array substrate having a plurality of antenna elements. At least two beamformers are coupled to the plurality of antenna elements. At least two filters support different frequency bands and are respectively coupled to the at least two beamformers. A frequency converter is coupled to the at least two filters, the frequency converter including one intermediate frequency (IF) port and at least two radio frequency (RF) ports. The one IF port of the frequency converter is configured to support the at least two beamformers via the at least two RF ports. A first beamformer of the at least two beamformers is coupled to a first filter of the at least two filters to form a first beam in a direction different than a second beamformer of the first two beamformers coupled to a second filter of the at least two filters.

Phased array system-in package supporting spatio-spectral division multiplexing

A wireless communication system includes a plurality of wireless stations. Each of at least two of the plurality of wireless stations includes, a first antenna transmitting a radio wave in a first frequency band, a second antenna transmitting a radio wave in a second frequency band lower in frequency than the first frequency band, a first transceiver transmitting and receiving a main signal in the first frequency band, and a second transceiver transmitting and receiving a control signal in the second frequency band. At least one of the at least two wireless stations includes, a variable beam antenna making a beam direction variable as the first antenna, a wide angle antenna having a radiation range equal to or wider than a variable range of the beam direction as the second antenna, and a controller controlling the beam direction of the variable beam antenna according to the control signal.

Wireless communication system and wireless communication method

A composite cable () houses a plurality of leaky coaxial cables having mutually different radiation characteristics. The leaky coaxial cable () includes therein an inner conductor and an outer conductor, and has a plurality of leakage slots. The plurality of leakage slots have different slot periods relative to the axial direction or arranged in different slot patterns. The digital wireless communication device feeds a high-frequency signal from an end of the composite cable () and performs MIMO (multiple-input multiple-output) communication.

Digital wireless communication device and digital wireless communication system

A floor cleaner has driven rollers integrally mounted with a pair of rotating cleaning bodies on respective opposite end portions thereof, each of the rotating cleaning body being provided with a plurality of blades made of an elastic material, and wheels including a pair each of main wheels disposed at forward and rear portions of the casing and auxiliary wheels each of which is located at an intermediate position defined between the respective rotating bodies and main wheels. Each of the auxiliary wheels is positioned somewhat lower than the respective main wheels, i.e. they are collectively arranged in a seesaw-like condition. The main wheels and the auxiliary wheels are journaled to the casing in such a manner that both are swingable toward the front and the rear of the casing. Idle rollers are journaled to the casing between the respective main wheels and the respective driven rollers in a swingable manner. The auxiliary wheels are adapted to freely abut and to be movable away from both the forward and rear driven rollers, respectively, and the respective idle rollers are adapted to freely abut and to be movable away from both the forward or the rear main wheels and the forward or the rear driven rollers, respectively.

Floor cleaner

A cleaner wherein the upper surface of a main body is provided with fasteners each of which includes a stopper arm portion which is opened and closed by slidably operating an opening and closing lever that is engageable with sides of the main body, while each side of the main body is provided with a pile composed of short tufts. A cloth having a larger area than that of the bottom of the main body is pierced with the pile to lock the same to the opposite sides of said main body, and the cloth is positively retained on the opposite sides of the main body by the stopper arm portions of the fasteners, so that the bottom of the main body is covered with the cloth.

Cleaner

Growing community of inventors

Chiba, Japan

Kiyoshi Kobayashi