Abstract: A power receiving unit includes: a power receiving section configured to receive power that is fed from a power feeding unit in a non-contact manner; a rectification section configured to rectify the power received by the power receiving section; a method determination section configured to identify a feeding method of the power feeding unit; and a target voltage setting section configured to set a target voltage of the power rectified by the rectification section, to a value corresponding to the feeding method identified by the method determination section.

Abstract: An object is to, in a wireless communication device used in the vicinity of a human body and including a substrate and an antenna, increase a size of the antenna as large as possible and reduce an influence on the human body. An antenna device includes a ground substrate, a vertical antenna element, and a horizontal antenna element. The ground substrate is connected to a radio frequency signal source. The vertical antenna element has one end connected to a feed point to which a signal is supplied from the radio frequency signal source, and extends in a direction vertical to a substrate surface of the ground substrate. The horizontal antenna element is connected to another end of the vertical antenna element and extends in a horizontal direction parallel to the substrate surface.

Abstract: A communication apparatus and method, an antenna apparatus, and a communication system that prevent reduced communication characteristics are disclosed. In one example, a coupled antenna element positioned in the vicinity of a communication apparatus is detected, adaptation of impedance is controlled on the basis of the detection result, and wireless communication is performed via the coupled antenna element with the adapted impedance. In addition, an antenna element is excited by a wireless signal from a communication apparatus positioned in the vicinity of the antenna element, and this communication apparatus is notified of being positioned in the vicinity of this antenna element.

Abstract: A device for power transmission includes a power transmission section and a detection section. The power transmission section is configured to transmit an electric power wirelessly. The detection section is operatively connected to the power transmission section and configured to detect an object within a range from the power transmission section based on a change in impedance in vicinity of the power transmission section.

Abstract: An antenna device, including an antenna element constituted by a conductor, having a tubular shape, and including a long notch section formed to extend in an axial direction in at least a part of a side surface, a capacitor formed to bridge end portions of the notch section in a short direction, substantially at a center of the notch section in a longitudinal direction, and a power feed point formed at a position which is apart from the capacitor to a side of one end portion of the notch section in the longitudinal direction and corresponds to a side of one end portion of the notch section in the short direction.

Abstract: The present technology relates to communication apparatus and method, and a communication system that enable communication control according to a gain of an antenna element. In a communication apparatus that performs wireless communication via an antenna element, a state of a gain of the antenna element is detected, a threshold value for carrier sense is controlled on the basis of the state of the gain of the antenna element that has been detected, the carrier sense is performed to determine whether communication using the threshold value that has been set possible, and wireless communication is performed in a case where it is determined that the communication is possible. The present disclosure can be applied to, for example, a transmission apparatus, a reception apparatus, a transmission/reception apparatus, a communication apparatus, electronic equipment, a computer, a program, a storage medium, a system, and the like.

Abstract: An information processing apparatus according to an embodiment of the present technology is capable of executing electric field communication and includes an antenna, a medium side electrode, and a communication unit. The antenna is used for other communication different from the electric field communication. The communication unit is electrically connected to each of the antenna and the medium side electrode and executes the electric field communication by using the antenna and the medium side electrode.

Abstract: [Object] To provide an electrode for intra-body communication that can enhance communication performance. [Solution] According to the present disclosure, the electrode for intra-body communication is used in an electrostatic coupling-type intra-body communication method with a carrier frequency of 40 MHz or less, the electrode including: a first electrode configured to be capacitatively coupled with a human body; and a second electrode having a capacitance of coupling with the human body that is five times or more and 11 times or less with respect to a capacitance at which the first electrode is coupled with the human body. A capacitance of coupling generated between the first electrode and the second electrode is 3 pF or less.

Abstract: A power receiving unit includes: a power receiving section configured to receive power that is fed from a power feeding unit in a non-contact manner; a rectification section configured to rectify the power received by the power receiving section; a method determination section configured to identify a feeding method of the power feeding unit; and a target voltage setting section configured to set a target voltage of the power rectified by the rectification section, to a value corresponding to the feeding method identified by the method determination section.

Abstract: A device for power transmission includes a power transmission section and a detection section. The power transmission section is configured to transmit an electric power wirelessly. The detection section is operatively connected to the power transmission section and configured to detect an object within a range from the power transmission section based on a change in impedance in vicinity of the power transmission section.

Abstract: [Object] To enable confirmation of the state of a target person even in a situation in which the target person moves by constructing an instrument used by the predetermined target person as a communication device. [Solution] An antenna device, including: an antenna element constituted by a conductor, having a tubular shape, and including a long notch section formed to extend in an axial direction in at least a part of a side surface; a capacitor formed to bridge end portions of the notch section in a short direction, substantially at a center of the notch section in a longitudinal direction; and a power feed point formed at a position which is apart from the capacitor to a side of one end portion of the notch section in the longitudinal direction and corresponds to a side of one end portion of the notch section in the short direction.

Abstract: A device for power transmission includes a power transmission section and a detection section. The power transmission section is configured to transmit an electric power wirelessly. The detection section is operatively connected to the power transmission section and configured to detect an object within a range from the power transmission section based on a change in impedance in vicinity of the power transmission section.

Abstract: A power receiving unit includes: a power receiving section configured to receive power that is fed from a power feeding unit in a non-contact manner; a rectification section configured to rectify the power received by the power receiving section; a method determination section configured to identify a feeding method of the power feeding unit; and a target voltage setting section configured to set a target voltage of the power rectified by the rectification section, to a value corresponding to the feeding method identified by the method determination section.

Abstract: The present technology relates to a transmitter/receiver and a transmitting/receiving method capable of suppressing deterioration of transmission efficiency during reception while maintaining transmission efficiency during transmission. A first electrode is provided close to a communication medium, a second electrode is provided in a manner facing the first electrode, and a third electrode is provided close to the communication medium together with the first electrode. A transmission circuit is connected to the first electrode and the second electrode so as to transmit a signal, and a reception circuit is connected to the first electrode and the second electrode so as to receive the signal. A switch electrically connects the second electrode to the third electrode, and an electrode control unit controls electrical connection between the second electrode and the third electrode by turning ON/OFF the switch.

Abstract: [Object] To provide an electrode for intra-body communication that can enhance communication performance. [Solution] According to the present disclosure, the electrode for intra-body communication is used in an electrostatic coupling-type intra-body communication method with a carrier frequency of 40 MHz or less, the electrode including: a first electrode configured to be capacitatively coupled with a human body; and a second electrode having a capacitance of coupling with the human body that is five times or more and 11 times or less with respect to a capacitance at which the first electrode is coupled with the human body. A capacitance of coupling generated between the first electrode and the second electrode is 3 pF or less.

Abstract: An information processing apparatus according to an embodiment of the present technology is capable of executing electric field communication and includes an antenna, a medium side electrode, and a communication unit. The antenna is used for other communication different from the electric field communication. The communication unit is electrically connected to each of the antenna and the medium side electrode and executes the electric field communication by using the antenna and the medium side electrode.

Abstract: A communication apparatus and method, an antenna apparatus, and a communication system that prevent reduced communication characteristics are disclosed. In one example, a coupled antenna element positioned in the vicinity of a communication apparatus is detected, adaptation of impedance is controlled on the basis of the detection result, and wireless communication is performed via the coupled antenna element with the adapted impedance. In addition, an antenna element is excited by a wireless signal from a communication apparatus positioned in the vicinity of the antenna element, and this communication apparatus is notified of being positioned in the vicinity of this antenna element.

Abstract: A device configured to receive power (20B), the device comprising a coil (21L) having a resistance, and at least one circuit (30) configured to calculate a target voltage value based on an amount of power received by the device and the resistance of the coil, and control received power voltage based on the calculated target voltage value.

Abstract: The present technology relates to communication apparatus and method, and a communication system that enable communication control according to a gain of an antenna element. In a communication apparatus that performs wireless communication via an antenna element, a state of a gain of the antenna element is detected, a threshold value for carrier sense is controlled on the basis of the state of the gain of the antenna element that has been detected, the carrier sense is performed to determine whether communication using the threshold value that has been set is possible, and wireless communication is performed in a case where it is determined that the communication is possible. The present disclosure can be applied to, for example, a transmission apparatus, a reception apparatus, a transmission/reception apparatus, a communication apparatus, electronic equipment, a computer, a program, a storage medium, a system, and the like.

Abstract: There is provided an antenna apparatus including: a magnetic sheet; a first antenna provided on one face of the magnetic sheet and used for communication; and a second antenna provided on the other face opposite to the one face of the magnetic sheet and used for wireless power transmission.