Invention Grant
- Patent Title: Dual-frequency RFID tag with isolated inputs
- Patent Title (中): 具有隔离输入的双频RFID标签
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Application No.: US13196877Application Date: 2011-08-02
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Publication No.: US09087281B2Publication Date: 2015-07-21
- Inventor: Yael Maguire , Ronald A. Oliver , Christopher J. Diorio
- Applicant: Yael Maguire , Ronald A. Oliver , Christopher J. Diorio
- Applicant Address: US WA Seattle
- Assignee: Impinj, Inc.
- Current Assignee: Impinj, Inc.
- Current Assignee Address: US WA Seattle
- Agency: Turk IP Law, LLC
- Main IPC: G08C19/12
- IPC: G08C19/12 ; G08B25/00 ; G08B13/14 ; G08B21/00 ; G06K19/00 ; G06K19/07 ; G06K19/077 ; H01Q1/22 ; H01Q1/24 ; H01Q21/30

Abstract:
An Integrated Circuit (IC) for an RFID tag includes two electrically isolated antenna ports for connecting to two antennas, with each antenna port configured to operate at a different frequency range and/or with a different communications protocol. In some embodiments a rectifier coupled to one of the antenna ports is operable to extract energy from an electromagnetic field in a first frequency range, and a demodulator coupled to the other antenna port is operable to demodulate symbols according to an RFID protocol in a second frequency range. In some embodiments the frequency ranges are disjoint, intersecting, or one is a proper subset of the other. In some embodiments each port is coupled to its own rectifier and/or its own modulator and/or its own demodulator. In some embodiments an RFID tag includes the IC and two antennas, each operable in one of the two frequency ranges.
Public/Granted literature
- US20110285511A1 DUAL-FREQUENCY RFID TAG WITH ISOLATED INPUTS Public/Granted day:2011-11-24
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