Abstract: The present invention relates to the field of receiving data and/or demodulating a data transmission signal. The present invention provides a method of and/or device for determining a data signal imposed on a phase jitter modulation signal. In one form, the invention relates to the field of Radio Frequency Identification (RFID), and the transmission of data between a tag and an interrogator.

Abstract: The present invention relates to the field of data transmission. The invention has application to amplifiers, the transmission of data modulated signals, filters and/or matching circuits connected between an amplifier and a load, radio transmitters, the transmission of data modulated radio signals, filters and/or matching circuits used between a transmitter's power amplifier and an antenna and the field of Radio Frequency Identification (RFID), such as in the transmission of data between a tag and an interrogator. The present invention enables the transmission of phase modulated signals, by adjusting a device's tuning to substantially match the instantaneous frequency of the phase modulated signal.

Abstract: A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memory array is responsive to an interrogating signal for selectively updating the data. A radio frequency identification transponder includes a signal processor that extracts an identifier from the interrogation signal and is responsive to the identifier and the stored data to determine whether some or all of the identifier is stored in the dynamic memory array.

Abstract: A radio frequency identification transponder including a power supply and a dynamic memory array which stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memory array is responsive to an interrogating signal for selectively updating the data. A signal processor extracts an identifier from the interrogation signal and is responsive to the identifier and the stored data to determine whether some or all of the identifier is stored in the dynamic memory array.

Abstract: A radio frequency identification transponder including a power supply and a dynamic memory array which stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memory array is responsive to an interrogating signal for selectively updating the data. A signal processor extracts an identifier from the interrogation signal and is responsive to the identifier and the stored data to determine whether some or all of the identifier is stored in the dynamic memory array.

Abstract: An identification token or label includes a light emitting device powered by and responsive to radio frequency signals to emit light in a predetermined frequency range and in a predetermined pattern. It has application as a gaming token for a casino environment or a medallion for use in monitoring patrons at sporting venues and in various parts of a supply chain.

Abstract: An excitation reference source (FC) is split through a 90 degree splitter. One output from the splitter is fed to the LO port of a mixer. Data is fed to the mixer's IF port and causes PRK modulation of the LO port's signal. The output of the mixer at the RF port is a PRK modulated quadrature signal. This is attenuated and added back onto the reference by a zero degree combiner ready for transmission to the transponder.

Abstract: A series of parallel spaced conductors through which currents are sequentially switched. A spatial relationship of the sequentially switched currents is chosen such that, at different times, tangential and normal magnetic fields are produced at the same location. The conductors are preferably arranged in a planar fashion and the tangential and normal magnetic fields are produced above the planar surface. A single layer of parallel spaced conductors provides substantially two dimensional operations. Adding a second parallel layer of orthogonally oriented parallel spaced conductors provides substantially three dimensional operations where currents are sequentially switched in both layers.

Abstract: An antenna for suppressing harmonics of a signal transmitted from the antenna, the signal having a carrier with an imposed modulated data signal, the antenna including a modulator associated with a controlled variable impedance in series, the modulator being operable to modulate in accordance with the data signal, and being configured to produce a voltage across the antenna corresponding to a voltage provided by the controlled variable impedance.

Abstract: An identification token or label includes a light emitting device powered by and responsive to radio frequency signals to emit light in a predetermined frequency range and in a predetermined pattern. It has application as a gaming token for a casino environment or a medallion for use in monitoring patrons at sporting venues and in various parts of a supply chain.

Abstract: A transceiver according to the invention has application to a baggage handling system, amongst others, and includes an electrical circuit having a modulated series resistor, in the form of resistor R(modulator). Also included is a parallel switch SW1, which is placed between the antenna and a storage capacitor in the AC part of the circuit. In other embodiments the modulated series resistor, again in the form of resistor R(modulator) and parallel switch SW1, is placed between the antenna and the storage capacitor in the DC part of the circuit. Both circuits produce the same transmitted signal, although in practice the latter is simpler to implement due to its DC operating bias. In still further embodiments a modulated series resistor is placed between the antenna and the antenna's tuning capacitor.

Abstract: A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memory array is responsive to an interrogating signal for selectively updating the data. A radio frequency identification transponder includes a signal processor that extracts an identifier from the interrogation signal and is responsive to the identifier and the stored data to determine whether some or all of the identifier is stored in the dynamic memory array.

Abstract: A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memory array is responsive to an interrogating signal for selectively updating the data. A radio frequency identification transponder includes a signal processor that extracts an identifier from the interrogation signal and is responsive to the identifier and the stored data to determine whether some or all of the identifier is stored in the dynamic memory array.

Abstract: A transmitter or a method for transmitting data from a first antenna imposes a low level phase modulation, for example of less than 90°, on a carrier signal in accordance with a data signal to create a modulated signal, preferably having a carrier frequency and sidebands, and the sidebands may be substantially lower in amplitude than the carrier frequency. The method may be used in an identification system, for example for identifying luggage or other items. In another aspect of an apparatus or method for transmitting data, a phase modulation may be imposed on a carrier signal in accordance with a data signal to create a modulated signal having a carrier and sidebands, where the amount of phase modulation being selected is such that the amplitude of the sidebands is substantially lower than that of the carrier. Phase modulation may be imposed by a mixer.

Abstract: A transmitter or a method for transmitting data from a first antenna imposes a low level phase modulation, for example of less than 90°, on a carrier signal in accordance with a data signal to create a modulated signal, preferably having a carrier frequency and sidebands, and the sidebands may be substantially lower in amplitude than the carrier frequency. The method may be used in an identification system, for example for identifying luggage or other items. In another aspect of an apparatus or method for transmitting data, a phase modulation may be imposed on a carrier signal in accordance with a data signal to create a modulated signal having a carrier and sidebands, where the amount of phase modulation being selected is such that the amplitude of the sidebands is substantially lower than that of the carrier. Phase modulation may be imposed by a mixer.