A near-field capacitive data communication system that uses a variable capacitive device such as a PIN diode to change the capacitance of a conductive plate in response to either a high or low data signal. A detector attached to a second conductive plate that is in proximity to the first conductive plate measures the capacitance of the first conductive plate and outputs a corresponding data signal. The technique is wireless, since the two conductive plates are not in electrical contact with one-another, but rather share their static electric fields. A microcontroller can act as a detector by baselining the capacitance of the first conductive plate when its capacitance is in the low capacitance state. The technique is ideal for communication between a pair of toys that can be brought in close proximity to one-another. Since no radio frequencies are used, no special testing or governmental electromagnetic compatibility rules apply.

An electrical power unit is positionable at a work surface and includes an upper housing including an upper surface and a lower surface spaced below the upper surface to define an upper housing chamber. A wireless power transmitter is disposed in the upper housing chamber and is operable to convey electrical energy to a wireless power receiver positioned at or above the upper surface. A base is coupled to the upper housing and extends downwardly therefrom, the base being configured for insertion into an opening formed in the work surface or into a space defined between two adjacent work surfaces. The base is further configured to facilitate securing the electrical power unit to the work surface or the adjacent work surfaces.

The present disclosure relates to a transmission/reception device and a transmission/reception method that improves a transmission characteristic in human body communication. The transmission/reception device includes three electrodes including a human body side electrode in contact with a human body, a space side electrode provided on a space side, not the human body side, and a circuit board provided with a circuit. At the time of transmission, a switch between the space side electrode and the circuit board is turned off to make a three-pole electrode configuration having superiority in the transmission characteristic, and each electrode is caused to function as an independent electrode. At the time of reception, the switch between the space side electrode and the circuit board is turned on to electrically short-circuit the space side electrode and the circuit board, to cause the electrodes to function as a two-pole electrode configuration having superiority in the transmission characteristic.

A resonator is provided. The resonator comprises at least two inductors and at least four capacitive electrodes electrically connected to the inductors. The capacitive electrodes and the inductors are configured to resonate and generate or couple with an electric field. The electrodes have either four fold mirror or rotational symmetry.

Disclosed is a system which extends NFC near field communication over a user's skin by converting electromagnetic signals into modulated alternating electric fields and vice versa. A modified patch is attached to an NFC device, which gets energized from its electromagnetic resonance which may contain data. The patch uses the energy to create an alternating electric field which couples into and spreads over a user's skin. The user may approach or touch objects which then get energized by the alternating electric field. The objects have a tag which modulates the electric field with data back over the user's skin to the patch, which then demodulates the data to modulate the NFC communication of the NFC device for further processing.

A set of rotary joint components containing stationary part(s) and rotatable part(s) repositionable with respect to each other. The stationary part has a stationary base with means for holding a stationary carrier into a circular-shaped form. The stationary carrier holds at least a stationary transmitter coupler of a contactless data link, such as a strip line. The stationary carrier is made of sheet metal or plastic material, and therefore can easily be prepared on a plane work bench before it is bent to a ring shape.

A detection apparatus and a method are provided for detecting a respiratory movement of a patient. The detection apparatus includes at least two metallic U-shaped signal coupling elements that are interleaved so that between the signal coupling elements arises at least one coupling point at which a signal may be transferred between the two signal coupling elements. Analysis electronics are configured to detect a change in a receive signal produced in a second of the signal coupling elements that is acting as a receiver in the near-field region of the first signal coupling elements as a result of a signal given for one of the signal coupling elements that is acting as a transmitter being coupled into the second of the signal coupling elements, which change indicates the respiratory movement.

A near-field communication circuit includes an oscillating circuit having a controllable capacitor. A control circuit is coupled to the oscillating circuit to control the controllable capacitor. A battery is coupled to the control circuit to enable control when the near-field communication circuit is in a standby mode. The near-field communication circuit can be utilized by a mobile communication device.

The invention relates to a rotation information transmission apparatus where wireless communication of data of several Gbps is made possible without miniaturizing the coupler to such an extent that installation is difficult. A first substrate where a first coupler in arc form is provided in an upper portion or a lower portion and a second substrate where a second coupler in arc form of which the length of the arc is shorter than that of the first coupler in arc form is arranged in a location where coupling with the first coupler in arc form is possible are arranged so as to rotate relative to each other by fixing either the first substrate or the second substrate to a non-movable portion and fixing the other of the first substrate or the second substrate to a rotational member.

An authorization device having an activation module and a wireless interface is configured in a non-enabled mode. In the non-enabled mode, the wireless interface is configured to receive data, and the authorization device is configured to block a request received via the wireless interface to interact with the authorization device. The activation module detects an activation operation. In response to detecting the activation operation, the activation module configures the authorization device in an enabled mode. In the enabled mode, the authorization device is configured to process a request to re-configure the authorization device received via the wireless interface, and to transmit authorization information to a reader device via the wireless interface.