Abstract: This optical coupler for coupling a plurality of visible light beams having different wavelengths includes: a substrate made of a material different from lithium niobate; and an optical coupling function layer formed on a main surface of the substrate. The optical coupling function layer includes: two multimode-interference-type optical coupling parts; optical-input-side waveguides and an optical-output-side waveguide connected to one multimode-interference-type optical coupling part, and optical-input-side waveguides and an optical-output-side waveguide connected to the other multimode-interference-type optical coupling part. The multimode-interference-type optical coupling parts, the optical-input-side waveguides, and the optical-output-side waveguides are made of a lithium niobate film.

Abstract: A power receiving apparatus capable of receiving power transmitted from a power transmitting apparatus capable of executing first foreign object detection and second foreign object detection, transmits, to the power transmitting apparatus, data to be used by the power transmitting apparatus to execute the first foreign object detection; before transmitting the data, determines whether a predetermined condition for the power transmitting apparatus to execute the second foreign object detection different from the first foreign object detection is satisfied; and transmits, to the power transmitting apparatus, a signal for causing the power transmitting apparatus to execute the second foreign object detection in accordance with the determination.

Abstract: A power transmission apparatus wirelessly transmits power to a power receiving apparatus via a power transmission antenna, measures at least either of a voltage and a current in the power transmission antenna at least two or more time points of a power transmission restriction period in which power to be transmitted to a power receiving apparatus is restricted, and performs measurement processing, including first measurement processing and second measurement processing, plurality of times. In this process, a processing period related to the first measurement processing and a processing period related to the second measurement processing are controlled to have different lengths.

Abstract: A communication device includes transmitting means for transmitting a signal in one or more frequency bands of a frequency channel including a plurality of frequency bands, identifying means for identifying occupancy of the plurality of frequency bands, and control means for controlling transmission power for transmitting the signal from the transmitting means, on the basis of an identification result obtained by the identifying means.

Abstract: A wireless power transmission system wirelessly transmits power from a power transmission apparatus to a power reception apparatus. The system performs detection processing using a first detection method for detecting an object different from the power reception apparatus. The system determines whether a predetermined condition related to a state of at least either one of the power transmission apparatus and the power reception apparatus is satisfied. Then, the system performs object detection processing using a second detection method, different from the first detection method, according to a result of the determination regarding whether the predetermined condition is satisfied.

Abstract: A communication device includes transmitting means for transmitting a signal in one or more frequency bands of a frequency channel including a plurality of frequency bands, identifying means for identifying occupancy of the plurality of frequency bands, and control means for controlling transmission power for transmitting the signal from the transmitting means, on the basis of an identification result obtained by the identifying means.

Abstract: A power transmission apparatus includes a first power transmission unit configured to perform wireless power transmission to a power receiving apparatus in a first region by using at least one of a plurality of coils, a second power transmission unit configured to perform wireless power transmission to a power receiving apparatus in a second region by using at least one of the plurality of coils. In a case where, while the first power transmission unit performs wireless power transmission to a first power receiving apparatus in a common region where the first region and the second region overlap, a second power receiving apparatus is placed in a region of the first region other than the common region, the first power transmission unit stops the wireless power transmission to the first power receiving apparatus and the second power transmission unit performs wireless power transmission to the first power receiving apparatus.

Abstract: A power transmission apparatus performs object detection, perform wireless power transmission to the power receiving apparatus via at least one of a plurality of coils. The power transmission apparatus, in a power transfer phase, stops the wireless power transmission for a specific period and, in the specific period, outputs a signal for object detection from a coil that is from among the plurality of coils and is different from the at least one of the plurality of coils.

Abstract: A power transmission apparatus performs wireless power transmission to a power receiving apparatus using at least one of a plurality of coils including a first coil and a second coil disposed at a position closer to the first coil than a position separated from the first coil by a specific distance, and perform object detection by outputting one or more signal for object detection from one or more of the plurality of coils. Signals for object detection are not outputted at a same time from the first coil and the second coil.

Abstract: A radiation detection apparatus includes a housing having an incident face and a side face, a reflective member accommodated within the housing, the reflective member having a reflective face which reflects radio waves, and an antenna element accommodated within the housing. The side face of the housing includes a conductor region and a transmissive region, the transmissive region having a higher radio wave transmittance than the conductor region. The reflective member is disposed in a position at which a first radio wave, which proceeds directly from the antenna element toward the transmissive region, and a second radio wave, which reaches the reflective face from the antenna element and is reflected toward the transmissive region by the reflective face, strengthen each other.

Abstract: A radiation detection apparatus includes a housing that includes an incidence surface and a back surface located on the opposite side of the incidence surface, a sensor panel that is housed in the housing and configured to convert radiation incident from the incidence surface into an electrical signal, a conductive plate that is housed in the housing and extends in a direction intersecting with a normal to the incidence surface, and an antenna element housed in the housing. The conductive plate is located between the sensor panel and the back surface. The antenna element is located between the conductive plate and the back surface. The antenna element includes a portion that extends in the direction intersecting with the normal to the incidence surface. The conductive plate is configured to function as a ground for the antenna element.

Abstract: A power transmitting apparatus (100) that transmits power wirelessly using a time-division method to a plurality of power receiving apparatuses (200) derives a plurality of pieces of data of power loss between the power transmitting apparatus (100) and the plurality of power receiving apparatuses (200) on a basis of a plurality of reception power values received from the plurality of power receiving apparatuses (200); and detects a foreign object within a power-transmittal range of the power transmitting apparatus (100) on a basis of the plurality of pieces of data of power loss.

Abstract: A power transmission apparatus that wirelessly transmits power to a power reception apparatus via an antenna controls to limit power transmission in the power transmission during a predetermined period, and detects an object different from the power reception apparatus based on a temporal change of a voltage or a current of the antenna corresponding to a first frequency during the predetermined period when the power transmission is limited and a temporal change of a voltage or a current of the antenna corresponding to a second frequency different from the first frequency, during the period when the power transmission is limited.

Abstract: A wireless communication apparatus 20 includes: a first communication unit configured to perform wireless communication that supports a plurality of wireless communication systems with different using frequency bands; a second communication unit configured to perform wired communication that supports a plurality of wired communication systems each with a different basic frequency used in data communication; and a switching unit configured to switch a wired communication system used in the wired communication by the second communication unit so that the basic frequency falls outside a predetermined frequency band including the using frequency bands of the wireless communication by the first communication unit.

Abstract: A power transmitting apparatus measures a waveform attenuation rate of a transmission power waveform, at a transmission antenna, in a state in which the power transmission by the power transmitting is restricted, sets a threshold used for detecting a foreign object between the power transmitting apparatus and the power receiving apparatus on the basis of the measured waveform attenuation rate, and determines whether or not the foreign object is present on the basis of the waveform attenuation rate measure after the threshold is set and the threshold.

Abstract: A wireless power transmission system wirelessly transmits power from a power transmission apparatus to a power reception apparatus. The system performs detection processing using a first detection method for detecting an object different from the power reception apparatus. The system determines whether a predetermined condition related to a state of at least either one of the power transmission apparatus and the power reception apparatus is satisfied. Then, the system performs object detection processing using a second detection method, different from the first detection method, according to a result of the determination regarding whether the predetermined condition is satisfied.

Abstract: A power receiving apparatus capable of receiving power transmitted from a power transmitting apparatus capable of executing first foreign object detection and second foreign object detection, transmits, to the power transmitting apparatus, data to be used by the power transmitting apparatus to execute the first foreign object detection; before transmitting the data, determines whether a predetermined condition for the power transmitting apparatus to execute the second foreign object detection different from the first foreign object detection is satisfied; and transmits, to the power transmitting apparatus, a signal for causing the power transmitting apparatus to execute the second foreign object detection in accordance with the determination.

Abstract: A wireless power transmission system wirelessly transmits power from a power transmission apparatus to a power reception apparatus. The system performs detection processing using a first detection method for detecting an object different from the power reception apparatus. The system determines whether a predetermined condition related to a state of at least either one of the power transmission apparatus and the power reception apparatus is satisfied. Then, the system performs object detection processing using a second detection method, different from the first detection method, according to a result of the determination regarding whether the predetermined condition is satisfied.

Abstract: A wireless power transmission system wirelessly transmits power from a power transmission apparatus to a power reception apparatus. The system performs detection processing using a first detection method for detecting an object different from the power reception apparatus. The system determines whether a predetermined condition related to a state of at least either one of the power transmission apparatus and the power reception apparatus is satisfied. Then, the system performs object detection processing using a second detection method, different from the first detection method, according to a result of the determination regarding whether the predetermined condition is satisfied.

Abstract: An antenna includes: a feeding point; an antenna element unit having one end connected to the feeding point and the other end connected to the ground conductor; and a first conductive portion connected to the ground conductor. The antenna element unit has, between one end and the other end, a second conductor portion having a shape in which a plurality of bent parts are formed, and at least a part of the antenna element unit and at least a part of the first conductive portion are electromagnetically coupled with each other.