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Reconfigurable general-purpose metamaterial

A metamaterial, general-purpose technology, applied to electrical components, antennas, etc., can solve the problem of uncontrollable dual negative frequency bands

Inactive Publication Date: 2019-05-07
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure can only realize the characteristic that the permittivity and magnetic permeability are both negative, and the double negative frequency band is increased but cannot be adjusted.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] refer to figure 1 , figure 2 and image 3 :

[0033] A reconfigurable universal metamaterial, including a first resonant unit 1, a dielectric substrate 2 and a second resonant unit 3, the first resonant unit 1 and the second resonant unit 3 are printed on the upper surface of the dielectric substrate 2 respectively and the lower surface;

[0034] The first resonant unit 1 is composed of a single split resonant ring 11 and a varactor diode 12, the single split resonant ring 11 is located on the upper surface of the dielectric substrate 2, and the varactor diode 12 is loaded on the single split resonant ring;

[0035] The second resonant unit 3 is composed of two single-aperture resonant rings 31 with the same structure and varactor diodes 32. The two single-aperture resonant rings 31 with the same structure are located on the lower surface of the dielectric substrate 2, and with respect to the second resonant The geometric center of the unit 3 is distributed symmetr...

Embodiment 2

[0045] Embodiment 2, the structure of this embodiment is identical with the structure of embodiment 1, and following parameter has been adjusted:

[0046] The length and width of the first resonant unit 1 are a=6.2mm, the width w1=1.6mm of the single opening resonant ring 11, the length g1=1.6mm of the opening, the length and width of the second resonant unit 3 are b=6.09mm, The width w2=0.85mm of the two single-slit resonant rings (31) with the same structure, and the length g2=1.6mm of the opening. The length L of the dielectric substrate 2 = 7.09 mm, the width W = 7.09 mm, and the thickness H = 1.2 mm.

Embodiment 3

[0047] Embodiment 3, the structure of this embodiment is the same as that of Embodiment 1, and the following parameters have been adjusted:

[0048] The length and width of the first resonant unit 1 are a=5.8mm, the width w1=1.4mm of the single opening resonant ring 11, the length g1=1.4mm of the opening, the length and width of the second resonant unit 3 are b=5.69mm, The width w2 of the two single-slit resonant rings (31) with the same structure is 0.65 mm, and the length of the opening g2 is 1.4 mm. The length L of the dielectric substrate 2 = 6.69 mm, the width W = 6.69 mm, and the thickness H = 0.8 mm.

[0049] Effect of the present invention can be illustrated by following simulation:

[0050] 1. Simulation model:

[0051] refer to Figure 4

[0052] The reconfigurable metamaterial of Example 1 was modeled in the commercial simulation software HFSS_15.0, and ideal electromagnetic boundaries were set around the metamaterial, wherein the upper and lower boundaries were...

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Abstract

The invention proposes a reconfigurable general-purpose metamaterial which solves the technical problem that the functions and the working frequency cannot be changed after the metamaterial structureis fixed. The metamaterial includes a first resonating unit (1), a dielectric substrate (2) and a second resonating unit (3), and the first resonating unit (1) and the second resonating unit (3) are respectively printed on the upper surface and the lower surface of the dielectric substrate (2), and the geometric centers of the first resonating unit (1), the dielectric substrate (2) and the secondresonating unit (3) coincide. The first resonating unit (1) is formed by a single-opening resonant ring (11) and a variable capacitance diode (12), and the second resonating unit (3) is formed by twosingle-opening resonant rings (13) and a variable capacitance diode (32). Through change of the capacitance values of varactors on the two layer structures, the frequencies and the sizes of a dielectric constant [epsilon] and a magnetic permeability [mu] of the metamaterial are regulated, different capacitance values are reasonably selected to achieve four different feature functions of a double positive medium [epsilon] being larger than 0 and [mu] being larger than 0, an electric single negative medium [epsilon] being smaller than 0 and [mu] being larger than 0, a double negative medium [epsilon] being smaller than 0 and [mu] being smaller than 0, and a magnetic single negative medium [epsilon] being larger than 0 and the [mu] being smaller than 0.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic medium characteristics research, and specifically relates to a reconfigurable universal metamaterial, which is used to realize the adjustment of the size and frequency of the dielectric constant and magnetic permeability, and can be used in the fields of antenna systems, microwave devices and electromagnetic stealth . Background technique [0002] Electromagnetic metamaterial is a new concept and new material proposed internationally in recent years. The definition of electromagnetic metamaterials is: "artificial composite media or composite structures with extraordinary physical properties that conventional media in nature do not possess." The intrinsic nature of electromagnetic metamaterials is to construct subwavelength structures by means of artificial engineering to realize the polarization characteristics of electric dipoles and magnetic dipoles. According to the medium parameter c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
Inventor 李龙乔畅韩家奇刘海霞
Owner XIDIAN UNIV
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