Systems and methods for communication between near field communication devices within a target communication region using near field magnetic induction is disclosed. One method comprises generating a near field detectable signal at an active node having a power level sufficient to enable communication with a plurality of near field communication nodes located within the target communication region. Information is modulated onto the near field detectable signal using at least one of the near field communication nodes. The modulated information is detected at the active node. The information is then relayed on the near field detectable signal from the active node to at least one of the plurality of near field communication nodes within the target communication region.

A system and a method for charging a mobile device in a vehicle are provided. A method, performed by an electronic device, for controlling a wireless charging device in a vehicle includes: identifying at least one mobile device in the vehicle; obtaining state information of the identified mobile device; obtaining state information of the vehicle; and controlling power of a plurality of wireless charging devices in the vehicle based on a state of the mobile device and a state of the vehicle.

Technology is disclosed for systems, devices, and methods relating to vehicle positioning. A system for vehicle positioning can comprise a passive resonator configured to be embedded in a roadway, and at least one antenna configured to be attached to a vehicle. The at least one antenna can be configured to transmit a first signal to the passive resonator and receive a second signal from the passive resonator at a harmonic frequency of the first signal. Diodes are used to stimulate a resonant circuit to create the second signal. The passive resonator can be configured to receive the first signal from the at least one antenna and transmit a second signal to the at least one antenna. The system can further comprise a processor configured to: calculate a relative position between the vehicle and the passive resonator based on a phase difference observed between the first signal and a reference signal.

A tablet stand is disclosed which incorporates a near field antenna configuration which couples to a near field antenna in the back of a tablet and provides a near field antenna coupling region for near field communication at the front of the tablet. The stand may be completely passive and use conductive antenna elements and passive resonance matching circuit elements to provide efficient coupling. In another aspect a thin profile passive keyboard adapted for use with a near field enabled tablet is provided. In another aspect a mounting bracket or holder, embedded antenna, and passive keyboard combination is provided adapted for converting a tablet into a notebook type configuration.

A method of controlling a wireless power transmitter to detect a foreign object can include in response to a wireless power receiver being placed in a charging area of the wireless power transmitter, determining a current peak frequency; collecting a communication error count related to communication between the wireless power transmitter and the wireless power receiver; determining a reference frequency for detecting the foreign object based on a reference peak frequency received from the wireless power receiver; and determining that the foreign object is present within the charging area based on the current peak frequency, the communication error count and the reference frequency.

Systems and methods for detecting fraud. One method includes providing an input device, the input device having processing circuitry, a memory, and at least one information receiving module for receiving information associated with a user of the input device. The method also includes providing a sensor in electronic communication with the processing circuitry. The sensor has a sensor coil, and the sensor coil is disposed proximate the at least one information receiving module. Further, the method includes flowing alternating electrical current through the sensor coil to generate a magnetic field, measuring at least one electrical characteristic of the sensor, and providing first information representative of the at least one electrical characteristic to the processing circuitry. Finally, the method includes storing in the memory second information representative of at least one predetermined value of the at least one electrical characteristic and comparing the first information with the second information.

An operation of calibrating the object using a reference reader is performed, the calibration operation including an operation of placing the reference reader at various distances away from the object that correspond to various values of a parameter within the object that is representative of the intensity of the signal received by the object, and, for each distance, an operation of determining an internal phase-shift compensation in the object with respect to a nominal internal phase shift, making it possible to obtain a load modulation amplitude that is higher, in terms of absolute value, than a threshold, and an operation of storing a lookup table of the various values of the parameter and the corresponding internal phase-shift compensations.

A wireless communication device includes a base sheet in a folded state, a first conductor pattern disposed on a first principal surface of the base sheet, a second conductor pattern disposed on a second principal surface of the base sheet opposite to the first principal surface, an RFIC chip disposed on the base sheet so as to electrically connect to the first conductor pattern, and a sheet-shaped connection conductor coupled to a turning part of the base sheet so as to partially overlap with an end portion of the first conductor pattern near the turning part and an end portion of the second conductor pattern near the turning part.

A surface mount device inductor has a package casing sized to attenuate electromagnetic coupling between the inductor coils of the surface mount device inductors. The package casing makes the surface mount device inductors self-shielding. The surface mount device inductors can be incorporated into a radiofrequency module, and can be incorporated into a front end system of a wireless mobile device.

An antenna configured for near field communication includes a first coil for transmitting and receiving signals having a first frequency and a second coil for transmitting and receiving signals having a second frequency greater than at least twice the first frequency. The first and second coils are magnetically coupled with a coupling coefficient greater than 0.5.