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8 selected articles

Rfid-based asset security and tracking system, apparatus ...

Systems and methods are disclosed for tracking an item using a RFID surveillance system. In some embodiments, a security controller is connected to a point of sale system with at least one RFID tag reader. In these embodiments, the RFID tag reader is associated with an area that is observable through a video camera. If the tag reader does not recognize information obtained from a RFID tag, the...

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US7961097B2 - RFID based monitoring system and method ...

An RFID based monitoring system and method is provided. A tag module is allocated to an item to be traced, which is operable by an RFID reader. In the system, the tag module is accessed through conductive coupling with an entry point that is operable in an RF field of the RFID reader.

Description

FIELD

The present disclosure relates to Radio Frequency Identification (RFID) technology, and more...

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US6577238B1 - RFID detection system - Google Patents

A system 100 is disclosed for monitoring the position of one or more RFID tags 201. The system has a detector 301 incorporating circuitry 304 for detecting changes in the range of an RFID tag 201 from the detector and for triggering an alarm 401 if a detected change in range of an RFID tag 201 exceeds a predetermined threshold or if the RFID radio tag cannot be detected by the detector 301. Range...

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US9183419B2 - Passive RFID assisted active RFID tag ...

Each item including the passive RFID tag 208 that is carried by the cart returns its EPC data to the passive RFID tag reader 104 when interrogated. The passive RFID tag reader 104 records in its internal memory the EPC data of each passive RFID tag 208 carried by the items on the cart. The passive RFID tag reader 104 may then transmit the received EPC data to the active RFID tag 102. The active...

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US20070241904A1 - RFID tag distance measuring system and ...

An RFID tag distance measuring system includes a reader that outputs a predetermined carrier signal to a tag and receives a reflected signal of the carrier signal from the tag. The reader has signal output means for outputting signals at multiple frequencies, which are different from each other, as the carrier signal, a transmitting section that transmits a signal output by the signal output...

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US20090160647A1 - Rfid tag detection method and system ...

An RFID tag detection method and system are described. The method comprises transmitting, in a predetermined area, a predetermined number of RFID tag request signals. The method also comprises determining that an RFID tag is positioned within the predetermined area based on a comparison of a count of zero or more received RFID tag response signals from the RFID tag with the predetermined number...

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US9136585B2 - Radio frequency identification tag - Google ...

The radio frequency identification tag can be used, for all kinds of purposes, as the markings on various objects to achieve versatile use, such as identification, authentication, or tracking.

The radio frequency identification tag typically has a housing made of silicone rubber and an inlay disposed in the housing. The inlay usually includes a chip and a wiring antenna disposed on a carrier...

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Related topics : radio frequency identification (rfid) / radio frequency identification (rfid) chip / radio frequency identification tags manufacturers / radio frequency identification tags (rfid) / radio frequency identification chip

US7769360B2 - Adapter for the RF front end processor chip ...

An adapter for RF front end processor chip wherein the RF front end processor chip includes a low noise amplifier which is used to receive a RF filter signal so as to generate a first signal. An adapter is used to receive a first signal so as to induce and generate a second signal and a third signal which is electrically reverse. Then a frequency mixer of the RF front end processor chip is used...

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Related topics : rf power amplifier chip / rf amplifier chip / rf modulator chip / rf receiver chip / rf front end chip