| Patent application number | Description | Published |
|---|
| 20090051533 | Backscattering Different Radio Frequency Protocols - The present disclosure is directed to a system and method for backscattering different radio frequency protocols. In some implementations, a radio Frequency (RF) tag includes an antenna and a storage module. The antenna is configured to receive an RF signal from any of a plurality of readers. Each reader is associated with a different protocol having different time durations. The storage module is coupled to the antenna and configured to store energy associated with the RF signal. In addition, the storage module substantially maintains a voltage in the tag during any of the different time durations independent of an internal power supply. | 02-26-2009 |
| 20090117847 | PASSIVELY TRANSFERRING RADIO FREQUENCY SIGNALS - The present disclosure is directed to a system and method for passively transferring Radio Frequency (RF) signals. In some implementations, a method for passively transferring RF signals to an interior region of a group of containers includes wirelessly receiving an RF signal incident a first portion of a container. The first portion is located at least proximate a periphery of the group of containers. The incident RF signal is passively transferred, through a wired connection, from the first portion of the container to a second portion of a container. The second portion is located at least proximate an interior portion of the group of containers. The RF signal wirelessly re-transmitted in the interior region of the group of containers. | 05-07-2009 |
| 20090267771 | PASSIVELY TRANSFERRING RADIO FREQUENCY SIGNALS - The present disclosure includes a system and method for passively transferring radio frequency signals. In some implementations, a signal transfer element configured to passively transfer RF signals between a first region of a container and a second region of the container includes a first antenna, a second antenna and a coaxial transmission line. The first antenna is configured to wirelessly receive and transmit RF signals and passively transfer wirelessly received RF signals to a first end of a coaxial transmission line. The second antenna is configured to wirelessly receive and transmit RF signals and passively transfer wirelessly received RF signals to a second end of the coaxial transmission line. The coaxial transmission line is configured to passively transfer RF signals between the first antenna and the second antenna. A leg of the first antenna, a leg of the second antenna, and a center conductor of the coaxial transmission line are formed from a continuous conductor independent of physical connections. | 10-29-2009 |
| 20090267862 | CONDUCTING RADIO FREQUENCY SIGNALS USING MULTIPLE LAYERS - The present disclosure includes a system and method for conducting radio frequency signals using multiple layers. In some implementations, a signal transfer element configured to passively transfer RF signals between a first region and a second region includes a first conductor layer having a first continuous conductor configured as a first portion of a first antenna, a transmission line, and a first portion of a second antenna. The first antenna and the second antenna are configured to wirelessly receive and transmit Radio Frequency (RF) signals. The signal transfer element also includes a second conductor layer having a second continuous conductor configured as a second portion of the first antenna, a ground plane, and a second portion of the second antenna. The first conductor layer and the second conductor layer are spatially proximate such that the transmission line and the ground plane are configured to passively transfer RF signals between the first antenna and the second antenna independent of an electrical connection between the first conductor layer and the second conductor layer. | 10-29-2009 |
| 20100289623 | INTERROGATING RADIO FREQUENCY IDENTIFICATION (RFID) TAGS - The present disclosure is directed to a system and method for interrogating RFID tags. In some implementations, a method includes transmitting an RF command signal to RFID tags in an inhibited zone during a first time period. The RF command signal substantially prevents the RFID tags in the inhibited zone from responding to RF interrogation. RFID tags in a target zone are interrogated during a second time period different from the first time period. The target zone located differently from the inhibited zone. | 11-18-2010 |
| 20100302012 | SWITCHING RADIO FREQUENCY IDENTIFICATION (RFID) TAGS - The present disclosure is directed switching RFID tags. In some implementations, the RFID system includes an RFID tag and a panel. The panel includes one or more contacts configured to move between a first position and a second position. The second position forms an electrical connection between the RFID tag and the one or more contacts to update a state of the RFID tag. | 12-02-2010 |
| 20110205025 | CONVERTING BETWEEN DIFFERENT RADIO FREQUENCIES - The present disclosure is directed to a system and method for converting between different radio frequencies. In some implementations, a method includes receiving a request from a Radio Frequency Identification Device (RFID) reader configured to communicate with a first type of RFID tag. Independent of digital signal processing, the received request is automatically converted to a request compatible with a second type of RFID tag different from the first type of RFID tag. The converted request is transmitted to an RFID tag of the second type of RFID tag. | 08-25-2011 |
| 20110304441 | MULTILANE VEHICLE TRACKING SYSTEM - A vehicle tracking system and method of tracking vehicles in multiple traffic lanes is disclosed. One system includes an RFID reader including a plurality of antenna ports. The system also includes a first antenna connected to a first antenna port of the plurality of antenna ports, the first antenna oriented toward a first lane of traffic. The system further includes a second antenna connected to the first antenna port and oriented toward a second lane of traffic. The system also includes a third antenna connected to a second antenna port of the plurality of antenna ports, the third antenna oriented toward the first lane of traffic. In some cases, the RFID reader is configured to detect the existence of a vehicle in a lane based on detection of an RFID device associated with the vehicle at two or more of the plurality of antenna ports. | 12-15-2011 |
