Metamaterial, and method and apparatus for adjusting frequency of metamaterial
First Claim
1. A metamaterial, comprising:
- a substrate material; and
an electrically controllable microstructure unit array attached on the substrate material and comprising a plurality of electrically controllable microstructure units;
wherein each electrically controllable microstructure unit comprises;
an external metal structure;
an internal metal structure;
wherein the internal metal structure and the external metal structure define a ring-shaped channel; and
a varactor diode disposed in the ring-shaped channel of each electrically controllable microstructure unit;
wherein the varactor diode is configured for adjusting an operating frequency of each electrically controllable microstructure unit according to a voltage applied across the varactor diode;
wherein the voltage applied across the varactor diode is a variable reverse bias direct current voltage.
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Abstract
The present invention discloses a metamaterial, and a method and an apparatus for adjusting a frequency of the metamaterial. The metamaterial includes a substrate material, and an electrically controllable microstructure unit array disposed on the substrate material and including a plurality of electrically controllable microstructure units. Each electrically controllable microstructure unit includes an external metal structure, an internal metal structure, and a varactor diode. The internal metal structure and the external metal structure define a ring-shaped channel. The varactor diode is disposed in the ring-shaped channel of each electrically controllable microstructure unit, and is configured for adjusting an operating frequency of each electrically controllable microstructure unit according to a voltage applied across the varactor diode. According to the present invention, a technical problem of failing to quickly and accurately adjust an operating frequency of the metamaterial in the prior art is solved.
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Citations
20 Claims
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1. A metamaterial, comprising:
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a substrate material; and an electrically controllable microstructure unit array attached on the substrate material and comprising a plurality of electrically controllable microstructure units;
wherein each electrically controllable microstructure unit comprises;an external metal structure; an internal metal structure;
wherein the internal metal structure and the external metal structure define a ring-shaped channel; anda varactor diode disposed in the ring-shaped channel of each electrically controllable microstructure unit;
wherein the varactor diode is configured for adjusting an operating frequency of each electrically controllable microstructure unit according to a voltage applied across the varactor diode;wherein the voltage applied across the varactor diode is a variable reverse bias direct current voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for adjusting a frequency of a metamaterial, the metamaterial comprising a substrate material and an electrically controllable microstructure unit array that is attached on the substrate material and comprises a plurality of electrically controllable microstructure units, each electrically controllable microstructure unit comprising an external metal structure, an internal metal structure, and a varactor diode;
- the internal metal structure and the external metal structure defining a ring-shaped channel, the varactor diode disposed in the ring-shaped channel of each electrically controllable microstructure unit;
wherein the method comprises;step 1;
obtaining a voltage applied across the varactor diode, wherein the voltage applied across the varactor diode is a variable reverse bias direct current voltage;step 2;
determining whether an operating frequency of the metamaterial satisfies a predetermined frequency; andstep 3;
adjusting the voltage across the varactor diode if it is determined that the operating frequency of the metamaterial does not satisfy the predetermined frequency, so as to make the operating frequency of the metamaterial satisfy the predetermined frequency;
wherein the operating frequency of the metamaterial changes as the voltage across the varactor diode changes. - View Dependent Claims (13, 14)
- the internal metal structure and the external metal structure defining a ring-shaped channel, the varactor diode disposed in the ring-shaped channel of each electrically controllable microstructure unit;
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15. An apparatus for adjusting a frequency of a metamaterial, the metamaterial comprising a substrate material and an electrically controllable microstructure unit array that is attached on the substrate material and comprises a plurality of electrically controllable microstructure units, each electrically controllable microstructure unit comprising an external metal structure, an internal metal structure, and a varactor diode;
- the internal metal structure and the external metal structure defining a ring-shaped channel, the varactor diode disposed in the ring-shaped channel of each electrically controllable microstructure unit;
wherein the apparatus comprises;an obtaining unit, configured for obtaining a voltage applied across the varactor diode, wherein the voltage applied across the varactor diode is a variable reverse bias direct current voltage; a determining unit, configured for determining whether an operating frequency of the metamaterial satisfies a predetermined frequency; and an adjustment unit, configured for adjusting the voltage across the varactor diode if it is determined that the operating frequency of the metamaterial does not satisfy the predetermined frequency, so as to make the operating frequency of the metamaterial satisfy the predetermined frequency;
wherein the operating frequency of the metamaterial changes as the voltage across the varactor diode changes. - View Dependent Claims (16, 17, 18, 19, 20)
- the internal metal structure and the external metal structure defining a ring-shaped channel, the varactor diode disposed in the ring-shaped channel of each electrically controllable microstructure unit;
Specification