Abstract:
A three-dimensional dipole antenna system for an RFID tag that optimizes detection for a given available volume in which to situate the RFID tag.
Abstract:
In a tag communication system, a method includes determining range information representative of a distance between two tags, and estimating parameter information representative of backscatter signals of a marker tag and an asset tag. A tag is localized according to the range information and the parameter information to provide a localized tag. The range information is determined according to a beacon signal. The system includes a plurality of beacon signals and the method further includes determining the range information according to at least two of the beacon signals. A logical operation is performed on the range information of the two beacon signals. A further beacon signal has a plurality of signal ranges and the range information is determined according to the signal ranges. A logical operation is performed on the range information of the signal ranges.
Abstract:
A system for radio frequency identification of a tag in an interrogation zone, includes a calibration node disposed in the interrogation zone to measure a signal strength of radio frequency identification signals from a beamforming system and provide signal data in accordance with the signal strength. A reader node is configured to receive the signal data and adjust the radio frequency identification signals generated by the beamforming system based upon the signal data. At least one of the calibration node, the reader node and the beamforming system is a configurable monitoring system. The calibration node, the reader node, and the beamforming system are coupled in a feedback control loop. The beamforming system includes a plurality of beamforming nodes. A signal of at least one beamforming node is optimized in accordance with the feedback control loop.
Abstract:
A method for installing an RFID tag on shipping articles includes applying a strip of conductive material to the surface of the article and providing an RFID chip having a body, a first bottom conductive point, a second bottom conductive point and a nonconductive fin between the first bottom conductive point and the second bottom conductive point. The fin is received in the shipping article. The RFID chip is attached to the shipping article by inserting the chip onto the strip of conductive material on the shipping article such that the fin severs the strip into a first strip and a second strip. The first bottom conductive point is electrically attached to the first strip and the second bottom conductive point is electrically attached to the second strip.
Abstract:
A system and method for automatically regulating access control levels in an access control system based on prevailing security levels including homeland security levels, local environment situations such as crowds, rioting, looting, severe weather and temporal states such as workdays, weekends, holidays, and open houses.
Abstract:
A method for installing an RFID tag on shipping articles includes applying a strip of conductive material to the surface of the article and providing an RFID chip having a body, a first bottom conductive point, a second bottom conductive point and a nonconductive fin between the first bottom conductive point and the second bottom conductive point. The fin is received in the shipping article. The RFID chip is attached to the shipping article by inserting the chip onto the strip of conductive material on the shipping article such that the fin severs the strip into a first strip and a second strip. The first bottom conductive point is electrically attached to the first strip and the second bottom conductive point is electrically attached to the second strip.
Abstract:
An electronic security system uses a set of predefined RFID tags. Each tag is associated with, and attached to, an article or packaging for an article. Each tag includes unique tag information which is logged into a computerized database that contains a record for each of the tags in the set. A detection zone is monitored with an interrogator which detects RFID tags. When an RFID tag is detected, the database records are compared to the tag information and an appropriate database response is output. A deactivation event may be performed on the tag when legitimate access is obtained to the tagged article. The deactivation event may be electronic, physical or virtual. One type of RFID tag used in the system may physically deactivated by altering the state of a circuit element associated with the tag so that the tag cannot return a response signal. Another type of RFID tag used in the system has electronically alterable tag information. The interrogator includes circuitry for detecting the electronic alteration and causing an appropriate response therefrom without requiring any communication with a database of tags.
Abstract:
A system for radio frequency identification of a tag in an interrogation zone, includes a calibration node disposed in the interrogation zone to measure a signal strength of radio frequency identification signals from a beamforming system and provide signal data in accordance with the signal strength. A reader node is configured to receive the signal data and adjust the radio frequency identification signals generated by the beamforming system based upon the signal data. At least one of the calibration node, the reader node and the beamforming system is a configurable monitoring system. The calibration node, the reader node, and the beamforming system are coupled in a feedback control loop. The beamforming system includes a plurality of beamforming nodes. A signal of at least one beamforming node is optimized in accordance with the feedback control loop.
Abstract:
A method for installing an RFID tag on shipping articles includes applying a strip of conductive material to the surface of the article and providing an RFID chip having a body, a first bottom conductive point, a second bottom conductive point and a nonconductive fin between the first bottom conductive point and the second bottom conductive point. The fin is received in the shipping article. The RFID chip is attached to the shipping article by inserting the chip onto the strip of conductive material on the shipping article such that the fin severs the strip into a first strip and a second strip. The first bottom conductive point is electrically attached to the first strip and the second bottom conductive point is electrically attached to the second strip.
Abstract:
A method of fabricating a tag includes the steps of applying a first patterned adhesive to the surface of the substrate and applying a first electrically conductive foil to the first patterned adhesive. A portion of the first electrically conductive foil not adhered to the first patterned adhesive is removed and a second patterned adhesive is applied to a portion of a surface area of the tag. A preformed second electrically conductive foil is applied to the second patterned adhesive to adhere the second electrically conductive foil to the surface of the substrate and portions of the first and second electrically conductive foils are electrically coupled to each other to form a tag circuit. A second patterned adhesive can be disposed between the first and second electrically conductive foils.