A batteryless wireless sensor system includes a data acquisition system, a radio frequency (RF) transceiver, and a batteryless wireless sensor device. The RF transceiver is in communication with the data acquisition system, transmits a RF signal, and receives sensor data and provide the sensor data to the data acquisition system. The batteryless wireless sensor device includes a RF transmitter, an analog to digital converter (ADC), and a sensor. The batteryless wireless sensor harvests energy from the RF signal and generates a DC signal based on the energy harvested from the RF signal, powers up and operates the ADC and the sensor based on the DC signal, and generates sensor data. The batteryless wireless sensor then transmits the sensor data via the RF transmitter to the RF transceiver. In certain examples, the ADC is implemented as a current mode ADC.

Disclosed is an activation module for a function in a motor vehicle accommodated in a component, the module including a detection and communication device including at least one communication antenna transmitting at a high frequency and a device for detecting a deformation of the component, the communication antenna being connected to a printed circuit board including a unit for measuring voltage variation across the terminals of the communication antenna, a unit for interpreting the measuring unit and transmission and reception unit with an electronic control unit having a unit for activating the function. The communication antenna is movable relative to the printed circuit board under the action of the deformation of the component, the measuring unit then detecting a voltage variation across the terminals of the communication antenna.

A user device including near-field communication (NFC) circuitry may receive a polling message from an NFC terminal. The user device may obtain information based at least in part on the polling message. The user device may determine a characteristic of the NFC terminal based at least in part on the information. The characteristic may be indicative of a radio frequency (RF) field strength of the NFC terminal. The user device may adjust an RF setting of the NFC circuitry based at least in part on the characteristic. The RF setting may correspond to an RF sensitivity of the NFC circuitry.

In an embodiment an acoustic transmission system includes a primary side having a transmitting unit configured to provide a transmit signal, a receiving unit configured to receive a received signal in response to the transmitted signal and an electroacoustic transducer configured to convert the transmit signal into an acoustic signal and an acoustic signal into the receive signal and a secondary side having a transponder configured to receive a receive signal and transmit a transmit signal and an electroacoustic transducer located between the primary side and the secondary side, the electroacoustic transducer having a medium permeable to acoustic signals.

The present disclosure provides a method and system for creating dipole moment model. The method is applied to a tested circuit and includes: performing a near-field measurement on the tested circuit, to obtain a near-field electric field and a near-field magnetic field related to the tested circuit; performing a two-dimensional divergence calculation on the near-field electric field and the near-field magnetic field, to obtain a near-field electric divergence field and a near-field magnetic divergence field; performing a convolution calculation on the near-field electric divergence field and the near-field magnetic divergence field with a digital filter; and building a dipole moment matrix equivalent to the tested circuit according to a result of the convolution calculation.

A Rugged portable device comprises: a base, a cover pivotally connected to the base, a first antenna unit, a second antenna unit, and a control unit. The first antenna unit and the second antenna unit are respectively disposed at an edge of the cover and an edge of the base, and the first antenna unit and the second antenna unit respectively have a near-field antenna and a far-field antenna. When the cover pivots relative to the base and is close to the base, the near-field antenna disposed at the cover and the near-field antenna disposed at the base generate a near-field communication (NFC) sensing signal and the near-field communication sensing signal is transmitted to the control unit. Therefore, the control unit sets up one of functions in the rugged portable device. For instance, the control unit switches off and/or switches on the far-field antenna or a peripheral unit (a keyboard or a camera).

In one embodiment, a near field communication (NFC) device is provided, comprising: a communication unit configured to be communicatively coupled to an NFC reader; a processing unit configured to use a plurality of emulated cards for executing one or more applications; a profile determination unit configured to determine a polling profile of said NFC reader, wherein the polling profile represents a sequence of predefined radio frequency (RF) transmission events, and wherein the profile determination unit is configured to determine said polling profile by comparing a detected sequence of RF transmission events with one or more predetermined sequences; a card selection unit configured to select a specific one of said emulated cards for use by the processing unit in dependence on the polling profile determined by the profile determination unit. In another embodiment, a corresponding method of operating an NFC device is conceived. In another embodiment, a computer program is provided for carrying out a method of the kind set forth.

For example, an apparatus may include a Body Proximity Sensor (BPS) configured to detect proximity of a wireless communication device to a human body based on wireless communication signals communicated by the wireless communication device. For example, the BPS may include an input to receive loopback information of a Receive (Rx) loopback signal, the Rx loopback signal including a wireless Rx signal received by a receiver of the wireless communication device based on a loopback of a wireless transmit (Tx) signal transmitted by a transmitter of the wireless communication device; and a processor configured to determine a detection result based on the loopback information, the detection result to indicate a detected proximity of the wireless communication device to the human body.

An input device includes a touchpad and a mounting bracket made of an electrically conductive material and configured to anchor the touchpad in an electronic system. The input device further includes a near field communication (NFC) controller, and an antenna electrically interfaced with the NFC controller. The antenna includes an electrically conductive strip formed by a segment of the mounting bracket.

A method includes defining a Center-of-Radiation Reference for a device under test, the CORR indicating a reference origin of an electromagnetic wave pattern formable with the DUT; determining a 3-dimensional orientation information with respect to the CORR, the 3-dimensional orientation information indicating a direction of the electromagnetic wave pattern; and providing the CORR and the 3-dimensional orientation information to a measurement system.