Abstract: The problem to solve is how to extend the operating range of small stackable RFID tags when they are placed in an undesirable orientation. Disclosed is an RFID tag that operates in two modes whereby in a first mode the tag has a short range and in a second mode the tag has a long range. The tag is converted from the first mode short range device into the second mode long range device by placing it close to a coupling device. That is in the second mode the tag becomes a two part RFID tag system (1400) capable of communicating with an interrogator antenna (1407).

Abstract: The present invention relates to the identification of RFID devices that are arranged closely together and placed on shelving for logistical and storage purposes. Furthermore, the aspects of the present invention relate to an arrangement and/or layout of antenna coils for example in an interrogator. There is disclosed a RFID interrogator and/or method of interrogating comprising an antenna, when activated, being adapted to radiate an interrogation signal in a first area, means adapted to shift the antenna within a second area, the second area being larger than the first area. The antenna may be mechanically moveable.

Abstract: The present invention relates to the identification of RFID devices that are arranged closely together and placed on shelving for logistical and storage purposes. Furthermore, the aspects of the present invention relate to an arrangement and/or layout of antenna coils for example in an interrogator. There is disclosed a RFID interrogator and/or method of interrogating comprising, in one form, an RFID docking station consisting of a stationary RFID interrogator with RFID shelving antennas and mobile cabinets with shelves where the docking station antennas and the cabinet shelves interpenetrate when the mobile cabinet is offered up to the docking station such that the antennas are able to identify tagged items on the cabinet shelves.

Abstract: The problem to solve is how to extend the operating range of small stackable RFID tags when they are placed in an undesirable orientation. Disclosed is an RFID tag that operates in two modes whereby in a first mode the tag has a short range and in a second mode the tag has a long range. The tag is converted from the first mode short range device into the second mode long range device by placing it close to a coupling device. That is in the second mode the tag becomes a two part RFID tag system (1400) capable of communicating with an interrogator antenna (1407).

Abstract: A preferred embodiment of the invention includes: an identification device (1) for receiving a first signal and transmitting a second signal, the device including: a receiving means (35) for receiving the first signal to generate a voltage; an integrated circuit (37) having a state selection means (41) for selecting whether the device (1) is in a. first state or a second state; a connection (39) between the receiving means (35) and the integrated circuit (37); a transmission means (45) for generating the second signal. The invention also includes a. system (50) that includes an interrogator (43) for interrogating a, plurality of the identification devices (1).

Abstract: The present invention relates to the field of communication and transmission of signals. In particular, the present invention relates to a new communication and/or modulation method. The present invention also relates to improving channel occupancy. The present specification discloses the adoption of phase transitions/changes in a manner that indicates a code by virtue of their position (timing) in the communication. This is referred to as Phase Position Modulation.

Abstract: The present invention relates to the identification of RFID devices that are arranged closely together and placed on shelving for logistical and storage purposes. Furthermore, the aspects of the present invention relate to an arrangement and/or layout of antenna coils for example in an interrogator. There is disclosed a RFID interrogator and/or method of interrogating comprising, in one form, an RFID docking station consisting of a stationary RFID interrogator with RFID shelving antennas and mobile cabinets with shelves where the docking station antennas and the cabinet shelves interpenetrate when the mobile cabinet is offered up to the docking station such that the antennas are able to identify tagged items on the cabinet shelves.

Abstract: A preferred embodiment of the invention includes: an identification device (1) for receiving a first signal and transmitting a second signal, the device including: a receiving means (35) for receiving the first signal to generate a voltage; an integrated circuit (37) having a state selection means (41) for selecting whether the device (1) is in a. first state or a second state; a connection (39) between the receiving means (35) and the integrated circuit (37); a transmission means (45) for generating the second signal. The invention also includes a. system (50) that includes an interrogator (43) for interrogating a, plurality of the identification devices (1).

Abstract: A preferred embodiment of the invention includes: an identification device (1) for receiving a first signal and transmitting a second signal, the device including: a receiving means (35) for receiving the first signal to generate a voltage; an integrated circuit (37) having a state selection means (41) for selecting whether the device (1) is in a first state or a second state; a connection (39) between the receiving means (35) and the integrated circuit (37); a transmission means (45) for generating the second signal. The invention also includes a system (50) that includes an interrogator (43) for interrogating a plurality of the identification devices (1).

Abstract: The present invention relates to the field of radio frequency identification (RFID). In one form, the invention relates to a method and/or device adapted to provide at least some level of providing lateral discrimination within a given area. The invention has been developed primarily for interrogating multiple passive transponders which are attached to objects to be identified by those respective transponders and will be described hereinafter with reference to that application. A typical application is the identification of RFID transponders or other RFID devices, such as those embedded in plastic tokens or cards within a selected area and which may be provided near each other or stacked on each other.

Abstract: A preferred embodiment of the invention includes: an identification device (1) for receiving a first signal and transmitting a second signal, the device including: a receiving means (35) for receiving the first signal to generate a voltage; an integrated circuit (37) having a state selection means (41) for selecting whether the device (1) is in a first state or a second state; a connection (39) between the receiving means (35) and the integrated circuit (37); a transmission means (45) for generating the second signal. The invention also includes a system (50) that includes an interrogator (43) for interrogating a plurality of the identification devices (1).

Abstract: Where a single cable conveys bidirectional RF signals and bidirectional data using a data carrying DC power signal where the RF signals and the bidirectional data carrying DC power signal are separated using frequency selective networks. Alternatively a single cable conveys bidirectional RF signals and bidirectional data using a modulated RF data signal where the RF signals and the bidirectional modulated RF data signal are separated using frequency selective networks. A array of switchable antennas where RF switching elements are integral to the antennas is connected to the single cable and is powered by and communicated with through the cable. The array of switchable antennas can be arranged to produce an interrogation field in any of one, two or three dimensions by the antennas being arranged to provide for a series of parallel spaced conductors through which currents are sequentially switched in order to produce both tangential and normal magnetic field components.

Abstract: The present invention relates to the identification of RFID devices that are arranged closely together and placed on shelving for logistical and storage purposes. Furthermore, the aspects of the present invention relate to an arrangement and/or layout of antenna coils for example in an interrogator. There is disclosed a RFID interrogator and/or method of interrogating comprising an antenna, when activated, being adapted to radiate an interrogation signal in a first area, means adapted to shift the antenna within a second area, the second area being larger than the first area. The antenna may be mechanically moveable.

Abstract: A preferred embodiment of the invention includes: an identification device (1) for receiving a first signal and transmitting a second signal, the device including: a receiving means (35) for receiving the first signal to generate a voltage; an integrated circuit (37) having a state selection means (41) for selecting whether the device (1) is in a first state or a second state; a connection (39) between the receiving means (35) and the integrated circuit (37); a transmission means (45) for generating the second signal. The invention also includes a system (50) that includes an interrogator (43) for interrogating a plurality of the identification devices (1).

Abstract: The present invention relates to the field of radio frequency identification (RFID). In one form, the invention relates to a method and/or device adapted to provide at least some level of providing lateral discrimination within a given area. The invention has been developed primarily for interrogating multiple passive transponders which are attached to objects to be identified by those respective transponders and will be described hereinafter with reference to that application. A typical application is the identification of RFID transponders or other RFID devices, such as those embedded in plastic tokens or cards within a selected area and which may be provided near each other or stacked on each other.

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: 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: Where a single cable conveys bidirectional RF signals and bidirectional data using a data carrying DC power signal where the RF signals and the bidirectional data carrying DC power signal are separated using frequency selective networks. Alternatively a single cable conveys bidirectional RF signals and bidirectional data using a modulated RF data signal where the RF signals and the bidirectional modulated RF data signal are separated using frequency selective networks. A array of switchable antennas where RF switching elements are integral to the antennas is connected to the single cable and is powered by and communicated with through the cable. The array of switchable antennas can be arranged to produce an interrogation field in any of one, two or three dimensions by the antennas being arranged to provide for a series of parallel spaced conductors through which currents are sequentially switched in order to produce both tangential and normal magnetic field components.

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.