Electro-ferromagnetic, tunable electromagnetic band-gap, and bi-anisotropic composite media using wire configurations
First Claim
1. An electro-ferromagnetic meta-material comprising:
- a dielectric material; and
a plurality of embedded resonant circuits arranged in a periodic structure within the dielectric material, each of the plurality of embedded resonant circuits including a metal loop having an arbitrary shape and size with at least one capacitive gap, the plurality of embedded resonant circuits defining means for varying permeability of an electro-ferromagnetic meta-material with an external direct current electric field.
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Abstract
An artificial electro-ferromagnetic meta-material demonstrates the design of tunable band-gap and tunable bi-anisotropic materials. The medium is obtained using a composite mixture of dielectric, ferro-electric, and metallic materials arranged in a periodic fashion. By changing the intensity of an applied DC field the permeability of the artificial electro-ferromagnetic can be properly varied over a particular range of frequency. The structure shows excellent Electromagnetic Band-Gap (EBG) behavior with a band-gap frequency that can be tuned by changing the applied DC field intensity. The building block of the electro-ferromagnetic material is composed of miniaturized high Q resonant circuits embedded in a low-loss dielectric background. The resonant circuits are constructed from metallic loops terminated with a printed capacitor loaded with a ferro-electric material. Modifying the topology of the embedded-circuit, a bi-anisotropic material (tunable) is examined. The embedded-circuit meta-material is treated theoretically using a transmission line analogy of a medium supporting TEM waves.
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Citations
31 Claims
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1. An electro-ferromagnetic meta-material comprising:
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a dielectric material; and a plurality of embedded resonant circuits arranged in a periodic structure within the dielectric material, each of the plurality of embedded resonant circuits including a metal loop having an arbitrary shape and size with at least one capacitive gap, the plurality of embedded resonant circuits defining means for varying permeability of an electro-ferromagnetic meta-material with an external direct current electric field. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 18, 19, 20, 26, 27, 28, 29)
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7. An electro-ferromagnetic meta-material comprising:
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a dielectric material; a plurality of embedded resonant circuits arranged in a periodic structure within the dielectric material, each of the plurality of embedded resonant circuits including a metal loop having an arbitrary shape and size with at least one capacitive gap, wherein the loop includes at least two capacitive gaps each of the two capacitive gaps located on an opposite leg of the metal loop and wherein at least one of the two capacitive gaps includes an electronic tunable capacitor; and a DC electric field applied to the dielectric material for tuning the electronic tunable capacitor to vary the band-gap of the meta-material.
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14. An electro-ferromagnetic meta-material comprising:
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a dielectric material; a plurality of embedded resonant circuits arranged in a periodic structure within the dielectric material each of the plurality of embedded resonant circuits including a metal loop having an arbitrary shape and size with at least one capacitive gap, wherein the plurality of embedded resonant circuits includes a first layer of embedded resonant circuits a second layer of embedded resonant circuits and a third layer of embedded resonant circuits; and
wherein each of the first layers the second layer and the third layer has a unique resonant frequency, wherein adjacent embedded resonant circuits are separated by a distance equivalent to a quarter wavelength. - View Dependent Claims (15, 16, 17, 25, 30, 31)
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21. An electro-ferromagnetic meta-material comprising:
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a dielectric material; and a plurality of embedded resonant circuits arranged in a periodic structure within the dielectric material, each of the plurality of embedded resonant circuits including a metal loop having an arbitrary shape and size with at least one capacitive gap, wherein the metal loop has a shape providing bi-anisotropic properties to the meta-material. - View Dependent Claims (22, 23, 24)
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Specification