Patent
Distributed capacitance LC resonant circuit
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TLDR
An electronic article surveillance system and a marker for use therein, which marker comprises a tuned resonant circuit including inductive and capacitive components formed of a laminate of a dielectric and conductive multi-turn spirals on opposing surfaces of the dielectrics, wherein the capacitive component is formed as a result of distributed capacitance between the opposed spirals, and wherein the circuit thereby resonates at at least two predetermined frequencies which are subsequently received to create an output signal.Abstract:
An electronic article surveillance system and a marker for use therein, which marker comprises a tuned resonant circuit including inductive and capacitive components formed of a laminate of a dielectric and conductive-multi-turn spirals on opposing surfaces of the dielectric, wherein the capacitive component is formed as a result of distributed capacitance between the opposed spirals, and wherein the circuit thereby resonates at at least two predetermined frequencies which are subsequently received to create an output signal.read more
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Patent
Applications for radio frequency identification systems
Sharon R. Garber,Bernard A. Gonzalez,Mitchell B. Grunes,Richard H. Jackson,Gerald L. Karel,John M. Kruse,Richard W. Lindahl,James E. Nash,Chester Piotrowski,John D. Yorkovich +9 more
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References
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Patent
A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination
TL;DR: In this article, a multi-frequency resonant tag circuit with distinct frequencies for detection and discrimination was used in a controlled area such as a retail store and employing a multiuser noise rejection circuitry.
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Process for fabricating resonant tag circuit constructions
TL;DR: In this article, an insulative substrate web having a conductive surface on a first face is printed and etched to provide a repetitive conductive circuit pattern, and the pattern is folded so that the conductive areas are aligned to form respective plates of a capacitor.
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