The present invention relates to a device (700a, 700b, 700c) for wireless transmission of data and/or power between the device and another device of a system, in particular of a patient monitoring system. To meet stringent relative time errors at low complexity the device comprises a connector (701) comprising a data transmission unit (703) and a magnetic coupling unit (702, 704) for transmitting power to and/or receiving power. A detection unit (705) detects coupling of a counterpart connector of another device of the system with the connector (701). A control unit (707) uses the detection that a counterpart connector of another device of the system has been coupled with the connector (701) as a trigger to determine and/or reset a relative time difference between a clock signal used by the device and a clock signal of the other device using i) the high frequency power signal of the magnetic coupling unit (702, 704) and of a magnetic coupling unit of the counterpart connector and/or ii) a received time calibration signal for determining and/or resetting the relative time difference.

Even when at least one of a capacitor (C.sub.1) connected to a main loop and a capacitor (C.sub.2) connected to an amplification loop cannot be set to an optimal value, a current value of a current (I.sub.2) flowing on the amplification loop can be made sufficiently large by setting the capacitors (C.sub.1, C.sub.2) based on any of an optimal C2 curved line, an optimal C1 curved line, and an optimal C1 straight line that pass through an optimal point (C.sub.1.sup.opt, C.sub.2.sup.opt) of the capacitors (C.sub.1, C.sub.2) and extend along a ridge of contour lines each joining the points where the magnitude of the current (I.sub.2) is equal on a diagram showing a relation of values of the capacitors (C.sub.1, C.sub.2) with the magnitude of the current (I.sub.2).

Disclosed herein is a mobile phone with the Near Field Communication (NFC) technology and method of operating the mobile phone. The mobile phone includes a display; a baseband chip; a near field communication (NFC) module comprising an RF antenna, an NFC tag circuit and an NFC main chip; and the RF antenna configured to receive incoming RF signals.

Systems and methods can include a transponder configured to communicate wirelessly with a receiver and sensor module (RSM), wireless communicate with a high-speed network, and radio-frequency (RF) powering of RSM. The high-speed network can include a wired network such as USB or Ethernet, or wireless network such as a WiFi or cellular network. Additionally or alternatively, an antenna module can be configured to transmit radio-frequency (RF) power to a receiver configured to monitor a condition of a machine.

A card-type wireless communication device is provided that suppresses a deterioration in communication performance of the dipole antenna while ensuring a larger coil antenna size in a limited card size. The card-type wireless communication device includes a coil antenna and a dipole antenna. The dipole antenna includes first dipole element including a first connection end connected to a second-frequency-band RFIC element, first linear part that extends from the first connection end along an outer edge of the coil antenna, and a first open end facing the outer edge of the coil antenna via the first linear part. Moreover, a second dipole element includes a second connection end connected to second-frequency-band RFIC element, and a second open end at a position farther from the outer edge of the coil antenna than a shortest distance between the first linear part and the outer edge of the coil antenna.

Biometric monitoring devices, including various technologies that may be implemented in such devices, are discussed herein. Additionally, techniques, systems, and apparatuses are discussed herein for utilizing two different Bluetooth communications interfaces, one that provides Bluetooth classic (base rate/enhanced data rate) communications functionality and one that provides Bluetooth low-energy communications functionality, in a common device. The techniques, systems, and apparatuses may elect to use a particular Bluetooth interface based on various criteria.

A file sending method, a file receiving method, and related terminals, where a first terminal is configured to scan on a BLUETOOTH low energy (BLE) broadcast channel to obtain a broadcast packet from at least one second terminal, determine at least one discoverable second terminal based on the broadcast packet, determine a target terminal that is configured to receive a file and that is in the at least one discoverable second terminal, send a coupling request to the target terminal, establish a BLE coupling between the first terminal and the target terminal, and send WI-FI direct coupling parameters to the target terminal using a BLE data channel of the BLE coupling. The WI-FI direct is established between the first terminal and the target terminal.

Even when at least one of a capacitor (C.sub.1) connected to a main loop and a capacitor (C.sub.2) connected to an amplification loop cannot be set to an optimal value, a current value of a current (I.sub.2) flowing on the amplification loop can be made sufficiently large by setting the capacitors (C.sub.1, C.sub.2) based on any of an optimal C2 curved line, an optimal C1 curved line, and an optimal C1 straight line that pass through an optimal point (C.sub.1.sup.opt, C.sub.2.sup.opt) of the capacitors (C.sub.1, C.sub.2) and extend along a ridge of contour lines each joining the points where the magnitude of the current (I.sub.2) is equal on a diagram showing a relation of values of the capacitors (C.sub.1, C.sub.2) with the magnitude of the current (I.sub.2).

Systems and methods can include a transponder configured to communicate wirelessly with a receiver and sensor module (RSM), wireless communicate with a high-speed network, and radio-frequency (RF) powering of RSM. The high-speed network can include a wired network such as USB or Ethernet, or wireless network such as a WiFi or cellular network. Additionally or alternatively, an antenna module can be configured to transmit radio-frequency (RF) power to a receiver configured to monitor a condition of a machine.

A communication circuit includes a first buffer configured to output a signal indicative of a first logic state or a second logic state, a signal in which the first logic state and the second logic state are defined being input to the first buffer, a second buffer configured to output a signal indicative of any one of the first logic state, the second logic state, and a third logic state, the signal output from the first buffer being input to the second buffer, and a monitoring circuit configured to monitor a logic state indicated by the signal output from the first buffer and cause the second buffer, in a case where the logic state does not change during a first period, to output the signal indicative of the third logic state.