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A broadband low dispersion negative refraction material

A negative refraction material, low dispersion technology, applied in the direction of electrical components, antennas, etc.

Inactive Publication Date: 2017-10-17
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a metamaterial that can realize low dispersion negative refractive index in a wider frequency band in view of the problem that existing negative refraction materials cannot achieve low dispersion negative refractive index in a wider frequency band

Method used

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  • A broadband low dispersion negative refraction material
  • A broadband low dispersion negative refraction material
  • A broadband low dispersion negative refraction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The width L of the crosshairs is 0.4182mm;

[0036] The ring width w of the semicircular opening to the ring is 0.03mm;

[0037] The size g of semicircular opening to ring opening is 0.32mm;

[0038] The distance n between two semicircular split rings is 0.01mm;

[0039] The inner radius r of the semicircular opening to the ring is 0.37mm;

[0040] The above-mentioned negative refraction material is simulated by using HFSS software, and the obtained reflection parameter S 11 , Transmission parameter S 21 And the electromagnetic response curves of the refractive index with respect to the frequency are as follows Figure 4 , Figure 5 shown. from now on Figure 4 It can be seen that when the electromagnetic wave excites the material, the S of the material 11 The amplitude is about in the frequency band of 0-50GHz, and the reflectivity|S 11 | 2 ≥95%. Figure 5 It is shown that the material has low dispersion negative refractive index in the frequency range of 45...

Embodiment 2

[0042] Different from Embodiment 1, the width L of the reticle in Embodiment 2 is 0.41 mm; the size g of the semicircular opening to the ring opening is 0.296 mm.

[0043] The above-mentioned negative refraction material is simulated by using HFSS software, and the obtained reflection parameter S 11 , Transmission parameter S 21 The electromagnetic response curves of parameters and refractive index with respect to frequency are as Figure 6 , Figure 7 shown. Depend on Figure 6 It can be seen that when the electromagnetic wave excites the material, the material has a relatively high reflectivity |S in the frequency band of 0-50 GHz 11 | 2 ,|S 11 | 2 ≥95%. Figure 7 In the 47.5GHz-57.5GHz (10GHz) frequency band, the material exhibits a low dispersion negative refractive index, and its refractive index is negative in the 40GHz-62.5GHz frequency band.

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Abstract

The invention relates to a wide-band low-dispersion negative refraction material, the basic structural unit of which includes a dielectric substrate, a reticle, and a pair of semicircular openings; Two sides; the semicircle split ring is set as a mirror image of the two semicircle split rings, and the center of the medium substrate side of the two semicircle split rings is a mirror image; the four edges of the cross line and The four edges of the dielectric substrate are flush. By designing the shape and structural parameters of the unit structure of the negative refraction material, the present invention can make the negative refraction material exhibit low dispersion negative refraction characteristics in a wide frequency band near 50 GHz, and at the same time exhibit high Reflectivity, by adjusting the main parameters of the structural unit, the offset of the negative refraction frequency band and the increase of the corresponding frequency band of the reflectivity can be realized, which can be widely used in microwave panel antennas and microwave reflectors.

Description

technical field [0001] The invention relates to a negative refraction material, more specifically, to a wide-band low-dispersion negative refraction material. Background technique [0002] Negative refraction material is an artificial composite material whose electromagnetic properties depend on the size and arrangement of its structural units. By designing the basic structural units that make up the material, a negative refractive index can be achieved within a certain frequency band. Negative refraction materials have abnormal electromagnetic properties, such as inverse Snell refraction, inverse Doppler frequency shift, inverse Goos-Hanchen phase shift, and inverse Cerenkov radiation, etc., and have potential applications in superlenses, invisibility cloaks, and omnidirectional filters. [0003] The change of refractive index of a material with frequency is called dispersion, and the slow change of refractive index with frequency is low dispersion. At present, the existi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00H01Q15/02
Inventor 杨荣草李建平李晋英张文梅
Owner SHANXI UNIV