Within many applications impulse radio based ultra-wideband (IR-UWB) transmission offers significant benefits for very short range high data rate communications when compared with existing standards and protocols. In many of these applications the main design goals are very low power consumption and very low complexity design for easy integration and cost reduction. Digitally programmable IR-UWB transmitters using an on-off keying modulation scheme on a 0.13 microns CMOS process operating on 1.2V supply and yielding power consumption as low as 0.9 mW at a 10 Mbps data rate with dynamic power control are enabled. The IR-UWB transmitters support new frequency hopping techniques providing more efficient spectrum usage and dynamic allocation of the spectrum when transmitting in highly congested frequency bands. Biphasic scrambling is also introduced for spectral line reduction. Additionally, an energy detection receiver for IR-UWB is presented to similarly meet these design goals whilst being adaptable to address IR-UWB transmitter specificity.

A wireless power transmission system includes a first antenna, a second antenna configured to perform wireless power transmission with the first antenna, and a movement unit configured to move a position of the second antenna relative to the first antenna in a predetermined moving direction, wherein the second antenna is shorter in length in the moving direction than the first antenna, wherein a distance between at least one end portion of the first antenna in the moving direction and the second antenna at a position where the second antenna faces the end portion is longer than a distance between an intermediate portion of the first antenna and the second antenna at a position where the second antenna faces the intermediate portion, and wherein the intermediate portion of the first antenna is a portion of the first antenna excluding both end portions of the first antenna.

Adapters that can mount phones or other electronic devices on camera stabilizers, where the adapters are portable, can capable of charging, and can allow cameras on the phones to be easily leveled or adjusted to any orientation. An adapter can include a base portion having an opening, where a fastener in the opening can attach the adapter to a camera stabilizer, as well as an upright portion having an enclosure and a contacting surface. The enclosure can house a first magnet array for magnetically attracting a second magnet array in a phone, such that the phone can be readily mounted to a camera stabilizer. The enclosure can further house near-field communication circuits and components for identification. The upright portion and base portion can be connected by a fixed right angle or by a hinge, which can allow the adapter to fold into a more convenient form.

One example discloses a near-field interface device, including: a near-field antenna; a physical port configured to be coupled to a computer; a controller coupled to the antenna and the physical port; wherein the controller is configured to translate a near-field signal received from the near-field antenna into an input command generated by a user; and wherein the controller is configured to transmit the input command to the computer through the physical port.

A sensor module for monitoring an asset in an electrical power generation or distribution system includes a module body, a sensor, a sensor near field coupling structure, and an interrogation near field coupling structure. The sensor is supported by the module body, arranged to sense a parameter of the asset and configured to generate a sensor output relating to the parameter. The sensor near field coupling structure is connected to the sensor and supported on a first side of a module body. The interrogation near field coupling structure is supported on a second side of the module body. The sensor output is transmitted from the sensor near field coupling structure to the interrogation near field coupling structure. The sensor module is configured to provide electrical isolation between the asset and a monitoring circuit configured to receive the sensor output through the interrogation near field coupling structure.

Methods and systems for a complementary metal oxide semiconductor wireless power receiver may include a receiver chip with an inductor, a configurable capacitance, and a rectifier. The method may include receiving an RF signal utilizing the inductor, extracting a clock signal from the received RF signal, generating a DC voltage utilizing a rectifier circuit, sampling the DC voltage, and adjusting the configurable capacitance based on the sampled DC voltage. The rectifier circuit may include CMOS transistors and T-gate switches for coupling to the inductor. The T-gate switches may be controlled by the generated DC voltage. A signed based gradient-descent algorithm may be utilized to maximize the DC voltage. The DC voltage may be sampled utilizing a comparator powered by the DC voltage, which may adaptively configure the capacitance. The inductor may be shielded utilizing a floating shield. The DC voltage may be increased utilizing a voltage-boosting rectifier.

An RFID tag to be used, for example, for tagging livestock. The RFID tag has a high resistance to mechanical and thermal stress due to a physical separation of a main antenna and an integrated circuit forming an RFID circuit. The RFID tag may comprise an inlay with the main antenna and a chip module with the integrated circuit and a loop antenna inductively coupled to the main antenna. The inlay and the chip module are safely embedded in a tag housing. The compact chip module with electrical connections between the loop antenna and the integrated circuit can be reliably protected.

A system includes a near-field communication device configured to transmit a radio frequency control signal in a near-field regime and an interface. The interface includes a near-field communication circuit configured to receive the RF control signal. The interface further includes a pulse width modulation signal generation circuit configured to generate a pulse width modulation signal according to the radio frequency control signal. The system further includes an electrically-controllable equipment configured to be controlled by the pulse width modulation signal.

A full duplex, low latency, near field data link controls a resonant induction, wireless power transfer system for recharging electric vehicles. An assembly of a vehicle is aligned with respect to a ground assembly to receive a charging signal. The vehicle assembly includes one or more coils, each coil having a full duplex inductively coupled data communication system that communicates with a ground assembly including one or more coils, with each coil also having a full duplex inductively coupled data communications system. The coils of the ground assembly and the vehicle assembly are selectively enabled based on geometric positioning of the vehicle assembly relative to the ground assembly for charging. As appropriate, the transmit/receive system of the ground assembly and/or the vehicle assembly are adjusted to be of the same type to enable communication of charging management and control data between the ground assembly and the vehicle assembly during charging.

A wireless power transfer system includes a power transmitter (201) arranged to provide a power transfer to a power receiver (205) via a power transfer signal. The power receiver (205) comprises a first mode controller (709) for transmitting a standby mode exit request to the power transmitter (201) by changing a loading of a communication inductor (209) of the power transmitter (201). The power transmitter (201) comprises a mode controller (405) which controls the power transmitter (201) to operate in a standby mode wherein a presence of the power receiver (205) is detected but no power transfer signal is generated. It furthermore comprises a detector (403) for detecting an impedance change of the communication inductor (209). The mode controller (405) is arranged to initiate a transition from the standby mode to a power transfer mode in response to the detector (403) detecting the impedance change.