185results about "Near-field in transponders" patented technology

A near field RF communicator has: an antenna operable to generate an RF signal to enable inductive coupling via the magnetic field of the RF signal between the antenna and another near field RF communicator or RF transponder in near field range; and a signal generator operable to generate a multi-level digital sine wave drive signal to drive the antenna to generate the RF signal, wherein the signal generator comprises a selector operable to select one or more digital sequences to provide one or more digital signals from which the digital sine wave drive signal is generated.

A detection and paramedic measuring system using a transponder composed of passive components and pulse inductive interrogation is disclosed. A methodology based on measuring the quality factor of the transponder is employed to detect a specific species of transponder or measure a parameter that alters the transponders quality factor.

A circuit includes a first integrated circuit or die having a first circuit and a first inductive interface. A second integrated circuit or die includes a second circuit and a second inductive interface, wherein the first inductive interface and the second inductive interface are aligned to magnetically communicate first signals between the first circuit and the second circuit and wherein the second inductive interface is coupled to engage in near field communications with a remote device, wherein the near field communications include second signals.

Ingestible event marker systems that include an ingestible event marker (i.e., an IEM) and a personal signal receiver are provided. Embodiments of the IEM include an identifier, which may or may not be present in a physiologically acceptable carrier. The identifier is characterized by being activated upon contact with a target internal physiological site of a body, such as digestive tract internal target site. The personal signal receiver is configured to be associated with a physiological location, e.g., inside of or on the body, and to receive a signal the IEM. During use, the IEM broadcasts a signal which is received by the personal signal receiver.

An inductive wireless power transfer device comprises a transmitter that comprises a transmit coil configured to generate a wireless power signal to a coupling region in response to an input voltage, and a modulator configured to modulate the wireless power signal and encode data with the wireless power signal to establish a back-channel communication link from the transmitter to a receiver. An inductive wireless power receiving device comprises a receiver that comprises a receive coil configured to generate a time varying signal in response to receiving a modulated wireless power signal from a transmitter in a coupling region, and a demodulator configured to demodulate the modulated wireless power signal from an established back-channel communication link from the transmitter to a receiver. Related inductive wireless power transfer systems and methods for back-channel communication from the transmitter to the receiver of an inductive wireless power transfer system are disclosed.

A transponder detector is provided with capabilities for detecting the presence and type of a transponder in its read range while operating at low power. The transponder detector includes an antenna assembly and a detection signal generator circuit coupled to the antenna assembly. The detection signal generator circuit is capable of generating a progression of detection signals on the antenna assembly across a range of frequencies. The transponder detector further includes a response signal receiver circuit coupled to the antenna assembly to receive a progression of response signals from the antenna assembly resulting from the progression of detection signals. A controller is coupled to the response signal receiver circuit which determines the presence and type of the transponder based on an evaluation of a transponder detection parameter in the progression of response signals.

A method for operating a tire pressure measuring system uses a transceiver. When triggered, the transceiver transmits an energy signal to a transponder in a tire that then responds with a data signal. So that the energy signals do not interfere with other transceivers on receipt of the data signals, the method makes provision for the repetition rate with which the energy signals are triggered to be a function of the speed of the vehicle. Transmission is more frequent at higher speed than at lower speed.

A multi-channel remote keyless entry (RKE) transponder having dynamically re-configurable input channel selection, channel disable, settable sensitivity for each channel, wake-up filter timing parameters, automatic gain control hold, internal tuning capacitor selection for each channel's antenna, minimum modulation depth requirement for input signal and bi-directional talk-back. Programmable minimum modulation depth requirement reduces false wake-up of the RKE transponder. An antenna for each channel of the RKE transponder may be tuned with internal tuning capacitors for improved range and receiver sensitivity. The internal tuning capacitor parameters may be stored in a configuration register. Gain of the channel may be fixed while the antenna is tuned. The antennas may be de-queued for talk-back to a base station for low frequency bi-directional communications. An external control device may dynamically read from and write to the configuration registers via a serial communications interface.

A wireless charging device comprising a base assembly having at least one first base terminal for input of electrical power and at least one second base terminal placed on a second base terminal housing of the base assembly for output of the electrical power and a head assembly detachably attached to the base assembly, the head assembly having at least one head terminal for input of the electrical power, at least one transmitter coil for transmitting the electrical power through inductive coupling to a receiver coil of a receiver mounted on at least one mobile device, the at least one mobile device detachably placed on a head cover of the head assembly, a magnet for facilitating attachment of the at least one mobile device to the head cover wherein the head assembly is attachable to a plurality of said base assemblies.

A system is provided in which a set of modules each have a substrate on which is mounted a radio frequency (RF) transmitter and / or an RF receiver. Each module has a housing that surrounds and encloses the substrate. The housing has a port region on a surface of the housing. Each module has a tapered near field communication (NFC) field confiner located between the substrate and the port region on the housing configured to guide electromagnetic energy produced by the RF transmitter to the port region so that it can be emanated to a port region of an adjacent module.

A multi-channel remote keyless entry (RKE) transponder having dynamically re-configurable input channel selection, channel disable, settable sensitivity for each channel, wake-up filter timing parameters, automatic gain control hold, internal tuning capacitor selection for each channel's antenna, minimum modulation depth requirement for input signal and bi-directional talk-back. Programmable minimum modulation depth requirement reduces false wake-up of the RKE transponder. An antenna for each channel of the RKE transponder may be tuned with internal tuning capacitors for improved range and receiver sensitivity. The internal tuning capacitor parameters may be stored in a configuration register. Gain of the channel may be fixed while the antenna is tuned. The antennas may be de-queued for talk-back to a base station for low frequency bi-directional communications. An external control device may dynamically read from and write to the configuration registers via a serial communications interface.

A transmission apparatus for a wireless device, comprising: an antenna for receiving an original signal and for backscattering a modulated signal containing information from the wireless device; a variable impedance coupled to the antenna, the variable impedance having an impedance value; and, a decoder coupled to the variable impedance for modulating the impedance value, and thereby a backscattering coefficient for the antenna, in accordance with the information to generate the modulated signal.

An underground radio communications and personnel tracking system uses a cap-lamp worn by a miner when underground in a mine. A cap-lamp transceiver provides voice and text communication on ultra-low frequency (ULF) to ultra-high frequency (UHF) carrier frequencies and modulation adapted by programming of a software defined radio to making selective and agile radio contacts via through-the-earth, conductor / lifeline, coal seam, tunnel, and ionosphere / earth-surface waveguides for transmission of electromagnetic waves. These waveguides comprise layered earth coal and mineral deposits, and manmade mining complex infrastructures which serendipitously form efficient waveguides. Ultra-Low Frequency F1 / F1 repeaters are placed underground in the mine, and providing for extended range of communication of the cap-lamp transceiver with radios and tracking devices above ground of the mine.

A circuit arrangement for phase modulation in an input circuit of a backscattering transponder includes a varactor and at least one capacitor connected in series between two antenna terminals, and at least two voltage sources selectively connected through at least two switches to at least one terminal of the varactor. A control unit selectively opens and closes the switches in response to the data to be phase-modulated onto the backscattered signal. By selectively connecting the different voltage values of the respective voltage sources to the varactor terminal(s) through the switches, the capacitance of the varactor and correspondingly the input impedance of the input circuit are thereby varied, so as to provide respective different phase positions of the phase modulation.

The RFID sensor tag may include normal RFID circuits and functions (such as rectifier, modulator, logic and memory) as well as a resonator-based clock generator or oscillator. The oscillator is a stable resonator-based oscillator having a high Q value. The resonator-based oscillator is loaded with a sensor element which tunes the oscillation frequency, i.e. the oscillation frequency is sensitive to the measured quantity. Thereby, a passive RFID sensor with a resonator-based oscillator and a sensor element is provided, wherein the oscillation frequency can be made dependent on the sensor element if sensing is required. The concept is compatible for existing RFID tags and can enable the possibility to measure external quantities with-out reducing the read-out distance.

A sensing and communication system includes a transceiver broadcasting an electromagnetic wave, a transponder supported on an associated structural member at a distance from the transceiver that receives the electromagnetic wave, and a sensor adjacent the transponder and in communication therewith. The sensor being operable to sense an input acting on the associated structural member and communicate a signal corresponding to the input to the transponder. The transponder is adapted to induce a modulation of the electromagnetic wave in relation to at least one of the sensor signal and the distance between the transceiver and the transponder. A method is also disclosed.

A proximity type antenna includes an antenna pattern for wirelessly communicating with an external communication device by magnetic coupling and a conductive plate arranged near the antenna pattern. The conductive plate has an aperture and a slit extending from the aperture to an end of the conductive plate and at least part of the aperture is arranged at a position of overlapping either the antenna pattern or the region surrounded by the inner periphery of the antenna pattern.

Disclosed is a smart phone, comprising: an NFC antenna and a transmission unit, the transmission unit being in communication with the NFC antenna. The smart phone further comprises: an NFC label integrated with the smart phone; the NFC label comprises an identifier; the NFC label is in communication with the NFC antenna, and transmits the identifier to the NFC antenna; the NFC antenna is configured to receive the identifier and forward same to the transmission unit, such that the transmission unit transmits a signal containing the identifier. Also disclosed is a vehicle control system having the smart phone. The vehicle control system also comprises an electronic control unit that receives the signal containing the identifier and controls the vehicle according to the signal. In the technical solution, the encryption of the signal transmitted by the smart phone is performed by means of simple and effective third-party encryption methods, thereby ensuring that the communication between the smart phone and an external device such as a vehicle control system is more secure and reliable.

An inductive wireless power transfer device comprises a transmitter that comprises a transmit coil configured to generate a wireless power signal to a coupling region in response to an input voltage, and a modulator configured to modulate the wireless power signal and encode data with the wireless power signal to establish a back-channel communication link from the transmitter to a receiver. An inductive wireless power receiving device comprises a receiver that comprises a receive coil configured to generate a time varying signal in response to receiving a modulated wireless power signal from a transmitter in a coupling region, and a demodulator configured to demodulate the modulated wireless power signal from an established back-channel communication link from the transmitter to a receiver. Related inductive wireless power transfer systems and methods for back-channel communication from the transmitter to the receiver of an inductive wireless power transfer system are disclosed.

A wireless data input system that has one or more continuous user input devices on a sensing pad or the like, each device connected to a respective individually addressable RFID tags. Each device operates to enable its corresponding individually addressable RFID tag to transmit a unique PN code or the like that is recognized by the RFID reader to identify the respective device and decode the data therefrom.

Systems and / or Methods are disclosed for acquiring data from a transceiver responsive to one or more signals that are received at the transceiver from one or more devices. In one embodiment, a transceiver is configured to transmit a signal responsive to having received a first signal from a first device, wherein the signal that is transmitted by the transceiver is configured to trigger a second device to transmit a second signal. The transceiver is further configured to transmit data responsive to having received the second signal that is transmitted by the second device. In other embodiments, a transceiver is configured to receive a signal from a first device over frequencies of a predetermined frequency band that the first device is authorized to use, to receive a signal from a second device over frequencies of the predetermined frequency band and to transmit data responsive to having received both the signal from the first device and the signal from the second device. The transceiver is further configured to require that both the signal from the first device and the signal from the second device be received at the transceiver before the data is transmitted. Analogous methods are also disclosed.

A sensing and communication system includes a transceiver broadcasting an electromagnetic wave, a transponder supported on an associated structural member at a distance from the transceiver that receives the electromagnetic wave, and a sensor adjacent the transponder and in communication therewith. The sensor being operable to sense an input acting on the associated structural member and communicate a signal corresponding to the input to the transponder. The transponder is adapted to induce a modulation of the electromagnetic wave in relation to at least one of the sensor signal and the distance between the transceiver and the transponder. A method is also disclosed.

A control system is provided for controlling an electronic device. The control system includes a control apparatus and a processing device. The control apparatus includes a transponder and a coupling unit. The transponder of the control apparatus may be configured to receive an activation signal and transmit a control signal to the processing device. The coupling unit may be configured to enable and disable transmission of the control signal to the processing device. The processing device may be configured to receive the control signal and communicate the control signal to an electronic device or utilize the control signal to control the electronic device.

A near-field coupling device that may facilitate communications with a transponder is provided. The near-field coupling device may include a ground plane, a dielectric substrate, one or more conductive strips and a terminating load. The conductive strips together with the ground planes form coupling elements. The near-field coupling device further includes one or more switching elements for selectively connecting and disconnecting the coupling elements with a transceiver. The connected coupling elements define a total characteristic impedance. Using the switching element, the ratio between the total characteristic impedance of the connected coupling elements and the terminating load may be changed in order to adjust the distribution of an electromagnetic field along the coupling elements according to the type and position of the transponder to be processed.

A method of constructing an RFID unit can include using a protective layer to hold an integrated circuit chip module to a substrate layer with an antenna unit while a conductive adhesive has not yet fully set.

A method for configuring a first near-field communication device according to a modulation type transmitted by a second device, wherein: a decoder of the first device is configured to decode a type-A modulation; a signal received during a first time slot corresponding to the duration of a first type-A symbol is decoded; and the first device is configured according to the value of the decoded symbol to determine the modulation type.