Inductor-capacitor resonant circuits and improved methods of using same
First Claim
1. A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which said tag is attached or with which said tag is associated, comprising:
- a first insulating layer having a top surface and a bottom surface;
a plurality of resonant circuits formed on said first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on the same one of the top surface and bottom surface of said first insulating layer, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another; and
wherein said tag is associated with a binary number established by a pattern of ones and zeros depending on each circuits'"'"' resonance or nonresonance, respectively.
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Accused Products
Abstract
A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which the tag is attached or with which the tag is associated. The tag includes a first insulating layer having a top surface and a bottom surface, and resonant circuits formed on the first insulating layer. Each of the resonant circuits are formed on one of the top surface and the bottom surface of the first insulating layer and have a resonant frequency associated therewith. Each of the resonant circuits include capacitance and inductance elements. The capacitance and inductance elements include an inwardly spiralled coil connected to an outwardly spiralled coil. The tag is associated with a binary number established by a pattern of ones and zeros depending on each circuits'"'"' resonance or nonresonance, respectively.
112 Citations
47 Claims
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1. A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which said tag is attached or with which said tag is associated, comprising:
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a first insulating layer having a top surface and a bottom surface;
a plurality of resonant circuits formed on said first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on the same one of the top surface and bottom surface of said first insulating layer, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another; and
wherein said tag is associated with a binary number established by a pattern of ones and zeros depending on each circuits'"'"' resonance or nonresonance, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 22, 23, 24, 25)
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10. A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which said tag is attached or with which said tag is associated, comprising:
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a first insulating layer having a top surface and a bottom surface; and
a plurality of resonant circuits formed on said first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on the same one of the top surface and bottom surface of said first insulating layer, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another. - View Dependent Claims (11, 12, 13, 26, 27, 28, 29)
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- 14. A resonance tag including a plurality of resonant circuits each comprising a capacitor element, and an inductor element electrically connected to said capacitor element, and said capacitor element and said inductor element are disposed on a same surface of the resonance tag, and the capacitor and inductor elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on the same one of the top surface and bottom surface of said resonance tag, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another.
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18. A method of identifying an item to or with which a radio frequency identification tag is attached or associated, respectively, comprising the steps of:
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providing said radio frequency identification tag having a plurality of resonant circuits formed on a first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiraled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on the same one of the top surface and bottom surface of said first insulating layer, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another;
using a scanning device to interrogate said plurality of resonant circuits by transmitting varying radio frequency waves at which said plurality of resonant circuits may resonate to said radio frequency identification tag; and
interrogating said plurality of resonant circuits to establish a pattern of binary ones and zeros. - View Dependent Claims (19, 20, 34, 35, 36, 37)
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21. A system, comprising:
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a resonance tag including a plurality of resonant circuits each comprising a single capacitor, a single inductor coil electrically connected to said single capacitor, and an insulating layer separating portions of said single capacitor and said single inductor coil that cross over from each other, and said single capacitor and said single inductor coil disposed on a same surface of the resonance tag, said single capacitor and said single inductor coil comprising an inwardly spiralled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on the same one of a top surface and bottom surface of said insulating layer, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another; and
a scanning device configured to transmit radio frequency waves to said resonance tag and to said plurality of resonant circuits at varying frequencies which said plurality of resonant circuits may resonate to identify an item to which said resonance tag is attached or with which said resonance tag is associated. - View Dependent Claims (38, 39, 40, 41)
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42. A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which said tag is attached or with which said tag is associated, comprising:
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a first insulating layer having a top surface and a bottom surface;
a plurality of resonant circuits formed on said first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on said first insulating layer, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another. - View Dependent Claims (43, 44, 45)
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46. A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which said tag is attached or with which said tag is associated, comprising:
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a first insulating layer having a top surface and a bottom surface;
a plurality of resonant circuits formed on said first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil, each combination of the inwardly and the outwardly spiralled coils disposed on said first insulating layer, without the first insulating layer or other insulating layer disposed between the inwardly and the outwardly spiralled coils, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another.
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47. A tag which uses radio frequency waves transmitted from a scanning device in order to identify an item to which said tag is attached or with which said tag is associated, comprising:
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a first insulating layer having a top surface and a bottom surface;
a plurality of resonant circuits formed on said first insulating layer, each of said plurality of resonant circuits formed on one of the top surface and the bottom surface of said first insulating layer and having a resonant frequency associated therewith, each of said plurality of resonant circuits including capacitance and inductance elements, said capacitance and inductance elements comprising an inwardly spiralled coil connected to an outwardly spiralled coil at a center of the spiral, each combination of the inwardly and the outwardly spiralled coils disposed on said first insulating layer, wherein, in operation, each of said inwardly spiralled coil and said outwardly spiralled coil are coplanar with one another.
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Specification