THIN FILM BASED SPLIT RESONATOR TUNABLE METAMATERIAL
First Claim
1. An apparatus, the apparatus being a metamaterial comprising:
- a substrate;
a plurality of resonators supported on the substrate, each resonator including;
a first conducting segment and a second conducting segment;
at least one adjustable capacitor located between the first and second conducting segments; and
at least one bias capacitor located between the first and second conducting segments; and
bias lines configured so as to allow a bias potential to be applied between the first and second conducting segments so as to vary the capacitance of the adjustable capacitor.
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Accused Products
Abstract
A metamaterial comprises a substrate and a plurality of resonators supported by the substrate, each resonator including a first conducting segment and a second conducting segment, there being at least one adjustable capacitor and at least one bias capacitor located between the first and second conducting segments. In some examples, the first conducting segment, second conducting segment, bias capacitor, and adjustable capacitor are substantially coplanar and may be formed by patterning a metal film supported by the substrate. Bias lines may be configured so as to allow a bias potential to be applied between the first and second conducting segments so as to vary the capacitance of the adjustable capacitor.
73 Citations
18 Claims
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1. An apparatus, the apparatus being a metamaterial comprising:
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a substrate; a plurality of resonators supported on the substrate, each resonator including; a first conducting segment and a second conducting segment; at least one adjustable capacitor located between the first and second conducting segments; and at least one bias capacitor located between the first and second conducting segments; and bias lines configured so as to allow a bias potential to be applied between the first and second conducting segments so as to vary the capacitance of the adjustable capacitor. - View Dependent Claims (2, 3, 4, 6, 7)
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5. The apparatus of claim 47 wherein the adjustable capacitor comprises a ferroelectric material.
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8. An apparatus, the apparatus being a metamaterial comprising:
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a substrate, the substrate being a planar substrate; a plurality of resonators supported on the substrate, each resonator including; a first conducting segment and a second conducting segment; an adjustable capacitor located between the first and second conducting segments; and a bias capacitor located between the first and second conducting segments, the bias capacitor being a planar interdigitated capacitor; and bias lines configured so as to allow a bias potential to be applied between the first and second conducting segments so as to vary the capacitance of the adjustable capacitor. - View Dependent Claims (9, 10, 11, 12, 13, 16)
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14. The apparatus of claim S, wherein:
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the substrate includes a polymer, an inorganic oxide, a glass, or a ceramic, and the first conducting segment, second conducting segment, and the bias lines are formed from coplanar metal films.
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15. The apparatus of claim S, wherein each resonator includes a resonant loop structure,
the resonant loop structure having an equivalent circuit including an inductive component and a capacitive component, the capacitive component being adjustable using the bias potential through adjustment of the adjustable capacitor, the capacitive component also including a contribution from the bias capacitor, the bias capacitor having a capacitance substantially independent of the bias potential.
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17. A method of fabricating an electrically tunable metamaterial, the method comprising:
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providing a substrate supporting a conducting film, patterning the conducting film so as to obtain a plurality of resonators, each resonator including a first conducting segment, a second conducting segments, a bias capacitor, and electrodes for an adjustable capacitor, the bias capacitor and the adjustable capacitor being located between the first and second conducting segments; and introducing a voltage-tunable material between the electrodes for the adjustable capacitor, so as to obtain the electrically tunable metamaterial. - View Dependent Claims (18)
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Specification