ThingMagic, Inc. Patent applications |
Patent application number | Title | Published |
20100137024 | Multi-Mode Radio Frequency Communications - A transceiver circuit includes an input to receive an RF mode control signal, multiple ports, and path circuitry disposed between the multiple ports. The path circuitry can be configured to create different low impedance conductive paths between the multiple ports depending on a state of the RF mode control signal. For example, depending on a mode as specified by the RF mode control signal, the transceiver circuit and corresponding path circuitry enables a half-duplex mode and a full-duplex mode. | 06-03-2010 |
20100134290 | METHODS AND APPARATUS FOR RFID TAG PLACEMENT - Systems and methods for placing RFID tags on objects are shown and described. The method includes scanning an object and analyzing one or more reflected signals from the to determine a suggested location for placement of an RFID tag. The scan can be accomplished using a scanning device having an antenna that operates in the near field of the object to measure at least one RF property of the reflected signal from the object. | 06-03-2010 |
20100109903 | Methods and Apparatuses For RFID Tag Range Determination - Apparatus and methods are described which are useful for determining a distance between an RFID tag and an RFID tag reader. In various embodiments, signals backscattered from a singulated tag over a range of frequencies are evaluated for in-phase I and in-quadrature Q signal components. The I-Q data is processed to determine phase delay angles associated with each signal frequency. The phase delay data can be processed by a sum of squared errors method or Fourier transform method to determine a distance to the singulated tag. The methods can also be used to determine any of a location, a radial velocity, a directional velocity of the singulated tag, and proximity of the singulated tag to a second tag. | 05-06-2010 |
20100109844 | Methods and Apparatuses For RFID Tag Range Determination - Apparatus and methods are described which are useful for determining a location characteristic between an RFID tag and an RFID tag reader or a second RFID tag. In various embodiments, signals backscattered from a singulated tag over a range of frequencies are evaluated for in-phase I and in-quadrature Q signal components. The I-Q data is processed to determine phase delay angles associated with each signal frequency. The phase delay data can be processed by a sum of squared errors method or Fourier transform method to determine a distance to the singulated tag. The methods can also be used to determine any of a location, a radial velocity, a directional velocity of the singulated tag, and proximity of the singulated tag to a second tag. | 05-06-2010 |
20100069011 | Methods and Apparatus For Self-Jamming Suppression In A Radio Frequency Identification (RFID) Reader - A circuit for transmitter-receiver isolation that is useful in a monostatic (combined transmitting and receiving) antenna configuration is shown and described. In addition, methods and systems are shown for automatically adjusting the circuit in response to changes in antenna configuration, external signal reflectors, and jamming energy (e.g., self jammer energy) by adjusting the circuit to tune out these sources of jammer energy to yield an increase in RFID reader receiver sensitivity when compared to measurements of the receiver sensitivity when the jammer energy is not present. | 03-18-2010 |