Resonant-circuit structure
First Claim
1. A resonant-circuit structure for enhancing the interrogation range of a radio-frequency identification system, the resonant circuit structure comprising a resonant circuit consisting of a coil assembly and a capacitor connected in parallel with a resonance frequency equal to the frequency of the interrogating signal of the radio-frequency identification system with which the resonant circuit structure is to operate, the coil assembly and the capacitor being embedded in a structure which provides physical support for the coil assembly and the capacitor and access to a tag associated with an object to be interrogated, the resonant circuit structure being separate and distinct from the radio-frequency identification system, none of the current flowing within the resonant circuit embedded in the resonant circuit structure being diverted to power other devices, there being no other built-in power sources;
- wherein containment of or a passageway for an object having a tag to be interrogated is provided between the coils of the coil assembly.
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Accused Products
Abstract
The invention is a resonant-circuit structure for enhancing the interrogation range of a radio-frequency identification system. The resonant circuit structure consists of a coil assembly and a capacitor connected in parallel with a resonance frequency equal to the frequency of the interrogating signal of the radio-frequency identification system with which the resonant circuit structure is to operate. The coil assembly and the capacitor are embedded in a structure which provides physical support for the coil assembly and the capacitor and access to a region near the coil assembly.
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Citations
1 Claim
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1. A resonant-circuit structure for enhancing the interrogation range of a radio-frequency identification system, the resonant circuit structure comprising a resonant circuit consisting of a coil assembly and a capacitor connected in parallel with a resonance frequency equal to the frequency of the interrogating signal of the radio-frequency identification system with which the resonant circuit structure is to operate, the coil assembly and the capacitor being embedded in a structure which provides physical support for the coil assembly and the capacitor and access to a tag associated with an object to be interrogated, the resonant circuit structure being separate and distinct from the radio-frequency identification system, none of the current flowing within the resonant circuit embedded in the resonant circuit structure being diverted to power other devices, there being no other built-in power sources;
- wherein containment of or a passageway for an object having a tag to be interrogated is provided between the coils of the coil assembly.
Specification
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- Resources
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Current AssigneeAvid Identification Systems, Inc. (Avid Technology Incorporated)
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Original AssigneeAvid Identification Systems, Inc. (Avid Technology Incorporated)
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InventorsTroesch, Peter, Lu, Gui-Yang, Cruz, Michael F
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Primary Examiner(s)BEE, ANDREW W.
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Application NumberUS12/367,999Publication NumberTime in Patent Office2,381 DaysField of Search340/572.5, 340/572.7, 340/572.8, 343/873, 235/384US Class Current1/1CPC Class CodesH04B 5/24 Inductive couplingH04B 5/48 TransceiversH04B 5/77 for interrogation
