Canon Kabushiki Kaisha

Koji Yukimasa

Tadashi Eguchi

Hitoshi Asai

Takeaki Itsuji

Takahiro Sato

Yasushi Koyama

Hidetada Nago

Atsushi Takasaki

Jun Morita

Tatsuya Murao

Yuki Kitazawa

A control apparatus controls a base station for a local network. The control apparatus sets a transmission output value of the base station based on an instruction value received from a management apparatus that manages allocation of a frequency resource to a plurality of local networks for dynamic frequency sharing among the plurality of local networks. The control apparatus notifies the management apparatus of a set value in such a manner that the management apparatus can coordinate a use of a frequency resource among the plurality of local networks based on the set value in a case where the set value being set is below the instruction value received from the management apparatus or a transmission output value set in advance.

Control apparatus, control method, communication system, and storage medium

In a wireless communication apparatus including a communication coupler and a circuit, a first substrate and a second substrate face each other in a longitudinal direction of the communication coupler. The first substrate includes a first signal line, a second signal line, a third signal line, a distributor, and a terminating resistor. At the distributor, the first signal line branches into the second signal line and the third signal line. The second signal line is terminated at the terminating resistor at an end of the first substrate. The second substrate includes a fourth signal line. At least one of the third signal line or the connection signal line is configured such that a phase of a signal at the facing portion of the second signal line and a phase of a signal at the facing portion of the fourth signal line are continuous.

Wireless communication apparatus

An antenna apparatus that comprises an active antenna including an antenna, a semiconductor structure configured to operate as an oscillator, and at least two power lines configured to give a potential difference to the semiconductor structure, and configured to generate or detect an electromagnetic wave, and a control line electrically connected to one of the at least two power lines and configured to be injected with a signal for controlling a phase of the oscillator in the active antenna is provided.

Antenna apparatus, communication apparatus, and image capturing system

A base station apparatus of a second network in which communication is performed using time division duplex (TDD) in a frequency band different from a frequency band of a predetermined first network receives, from a terminal apparatus currently connected to the base station apparatus, a first notification indicating whether the terminal apparatus has detected a radio wave of a network different from the second network, and transmits, if it is specified based on the first notification that the terminal apparatus has detected a radio wave of the first network, to the terminal apparatus, a second notification for instructing to perform communication by setting a guard band for the frequency band used in the first network.

Base station apparatus, terminal apparatus, control method, and storage medium

A wireless power transmission system includes a transmission line, one end of which is connected to a power reception unit configured to receive AC power, a splitting unit, one end of which is connected to an other end of the transmission line and an other end of which is split into a plurality of transmission lines, a first rectification unit connected to a second transmission line of the splitting unit, and a second rectification unit connected to a third transmission line. A transmission line length of the second transmission line and a transmission line length of the third transmission line are each substantially equal to one fourth of a wavelength of the AC power.

Wireless power transmission system, control method of controlling wireless power transmission system, and storage medium

A communication system performs wireless communication using electromagnetic field coupling between a transmission coupler and a reception coupler and moves at least one of the transmission coupler and the reception coupler so as to change the position in a predetermined direction of the reception coupler relative to the transmission coupler. In the communication system, the greater the distance between an overlap portion where the transmission coupler and the reception coupler overlap as viewed from a vertical direction to the predetermined direction and an input end of the transmission coupler is, the higher the degree of coupling between the transmission coupler and the reception coupler becomes.

Communication system

A communication apparatus acquires, from an external apparatus, an application for using a communication service using a local network in which communication is performed with a base station, that broadcasts a public land mobile wireless network identifier. The public land mobile wireless network identifier may not be defined in ITU-T Recommendation E.212, using a wireless communication method that supports transmission/reception with a plurality of OFDM subcarrier intervals, the application being bundled with connection setting information for making a connection to the local network, and make a connection to the local network using the connection setting information if the acquired application is active.

Communication apparatus, control method of communication apparatus, provision method, and non-transitory computer readable storage medium

A wireless system includes a first antenna configured to form at least part of the shape of a first ring, a second antenna configured to form at least part of the shape of a second ring, where the second antenna is capable of being coupled to the first antenna by an electromagnetic field, a first rotation control unit configured to rotate at least one of the first antenna and the second antenna about a first axis that passes through the substantial center of the first ring, and a second rotation control unit configured to rotate at least one of the first antenna and the second antenna about a second axis that passes through the substantial center of the second ring and that is substantially orthogonal to the first axis.

Wireless system and method for controlling wireless system

A communication system comprises a first conductor member in which a first signal line is connected at a connection position other than end portions on a surface of the first conductor member, a second conductor member connected with a second signal line, and a communication control unit that controls wireless communication by electromagnetic coupling between a first coupler including the first conductor member and a second coupler including the second conductor member. A distance between the connection position and a farthest point from the connection position on the surface of the first conductor member is equal to or less than a quarter wavelength corresponding to a signal to be used in communication by the communication control unit.

Communication system, communication apparatus, and communication method

A wireless communication system includes a first communication apparatus including a first antenna and a second antenna, a second communication apparatus including a third antenna and a fourth antenna, a first communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the first antenna and the third antenna, and a second communication control unit that controls wireless communication based on electric field coupling or magnetic field coupling between the second antenna and the fourth antenna.

Wireless communication system

A cell that configures an electromagnetic band-gap structure, comprises a first flat conductor and a second flat conductor arranged opposing each other, a first coupling conductor that is positioned between the first flat conductor and the second flat conductor, is that electrically connected to the first flat conductor, and that has an end that is not connected to the second flat conductor, a second coupling conductor electrically connected to the first flat conductor and the second flat conductor, and a first conductor strip electrically connected to an end of the first coupling conductor and the second coupling conductor.

Cell and electromagnetic band-gap structure

An antenna device comprises a cell structure including a plurality of cells made up of a multi-layer structure including a conductor layer and a dielectric layer, arranged in a matrix, and further comprises a first antenna element and a second antenna element arranged over the cell structure. The cells are configured to have artificial magnetic conductor effects corresponding to different frequency bands in a first direction and a second direction, and the first antenna element and the second antenna element are arranged parallel to the surface of the cell structure, respectively along the first direction and the second direction.

Antenna device

A loop antenna includes a parasitic element arranged at a position almost concentric to a loop element and having an opening portion smaller than the half perimeter of the loop element at a position opposite to the feeding point of the loop element.

Growing community of inventors

Yokohama, Japan

Koji Yukimasa