A terahertz metamaterial filter

A filter and metamaterial technology, which is applied in the field of terahertz technology and metamaterial devices, can solve problems such as low square coefficient, poor flat-top characteristics, and difficulty in meeting practical application requirements, and achieve high square coefficient and low material cost.

Active Publication Date: 2022-06-28
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] For filters, bandwidth and squareness coefficient are two basic characteristics. In practical applications, there are usually high requirements for these two characteristics. The existing terahertz metamaterial filter technology is mainly based on single-frequency resonance, which has a narrow bandwidth. , low square coefficient, and poor flat-top characteristics, it is difficult to meet the needs of practical applications, and also hinders the development of terahertz metamaterial filters

Method used

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  • A terahertz metamaterial filter
  • A terahertz metamaterial filter
  • A terahertz metamaterial filter

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Embodiment Construction

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] like figure 1 As shown, a terahertz metamaterial filter consists of n×n identical units, in this embodiment, n=2; the unit consists of 10 layers of metal 1, 10 layers of polyimide 2 and 9 layers of polyimide Methacrylimide 3, aligned and stacked in the order of metal 1-polyimide 2-polymethacrylimide 3 starting from the incident direction of the terahertz wave, leaving no gaps between layers, layer 1 is metal, and the 29th layer is polyimide, such as image 3 shown.

[0034] The metal layer 1 used in this embodiment is copper, the dielectric constant of the used polymethacrylimide 3 is 1.05, and the dielectric constant of the used polyimide 2 is 3.4.

[0035] like image 3 and Figure 4 As shown, in a single unit, the cross metal layer 1 is symmetrical up and down and left and right, the length L is 650um, the line width W is 78um, and the thickness c is 0.2um...

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Abstract

The invention discloses a terahertz metamaterial filter comprising: n×n identical units; each unit is composed of multi-layer polymer materials polymethacrylimide and polyimide and multi-layer metal layers, And starting from the incident direction of the terahertz wave, they are aligned and stacked repeatedly in the order of metal-polyimide-polymethacrylimide. The terahertz wave is incident on the filter to generate electromagnetic resonance, the terahertz wave at the resonant frequency is reflected and absorbed to form a stop band, and the waves of other frequencies are not hindered. The filter of the present invention mainly solves the problems of small square coefficient and narrow bandwidth in the existing filters of the same type, and has the advantages of flat top, polarization insensitivity and low cost.

Description

technical field [0001] The invention relates to the field of terahertz technology and metamaterial devices, in particular to a metamaterial filter used in the terahertz frequency band. Background technique [0002] Terahertz technology has great potential in wireless communications, space science, and sensing. To realize practical terahertz systems, there is a strong demand for terahertz functional devices such as filters, phase shifters, absorbers, and modulators that can directly control terahertz waves. [0003] Metamaterial filters are designed to generate electrical resonance and magnetic resonance with the incident electromagnetic wave by reasonably designing the geometric structure and geometric parameters of the metamaterial. At the resonance frequency, most of the incident waves are reflected and absorbed to form a stop band. At the non-resonant frequency, the incident wave is transmitted through the metamaterial to form a passband, thereby realizing the regulation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20
CPCH01P1/20
Inventor 阮久福姬生伟兰凤王亮张娜
Owner HEFEI UNIV OF TECH
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