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Terahertz metamaterial filter

A filter and metamaterial technology, which is applied in the field of terahertz technology and metamaterial devices, can solve the problems of low rectangular coefficient, poor flat top characteristics, and difficulty in meeting practical application requirements, and achieves the effect of low material cost.

Active Publication Date: 2020-10-13
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing.

[0027] Such as figure 1 As shown, a terahertz metamaterial filter is composed of n×n identical units, in this embodiment, n=2; the units are composed of 10 layers of metal 1, 10 layers of polyimide 2 and 9 layers of polyimide Methacrylimide 3, starting from the incident direction of the terahertz wave, align and stack in the order of metal 1-polyimide 2-polymethacrylimide 3, without gaps between layers, the first layer is metal, the 29th layer is polyimide, such as image 3 shown.

[0028] The metal layer 1 used in this embodiment is copper, the dielectric constant of the polymethacrylimide 3 used is 1.05, and the dielectric constant of the polyimide 2 used is 3.4.

[0029] Such as 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...

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Abstract

The invention discloses a terahertz metamaterial filter, which comprises n * n same units. Each unit is composed of multiple layers of high polymer materials including polymethacrylimide and polyimideand multiple metal layers, wherein the layers are aligned and repeatedly stacked in the sequence of metal-polyimide-polymethacrylimide from the incident direction of terahertz waves. Terahertz wavesenter the filter to generate electromagnetic resonance, the terahertz waves at the resonant frequency are reflected and absorbed to form a stop band, and waves at other frequencies are not hindered. With the filter provided by the invention, problems of small rectangular coefficient and narrow bandwidth in the existing filters of the same type are solved, and the filter has the advantages of flattop, insensitive polarization 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 the fields of wireless communication, space science and sensing. To realize a practical terahertz system, there is a strong demand for terahertz functional devices such as filters, phase shifters, absorbers, and modulators that can directly regulate terahertz waves. [0003] The metamaterial filter is to reasonably design the geometric structure and geometric parameters of the metamaterial to generate electrical resonance and magnetic resonance with the incident electromagnetic wave, respectively. At the resonant frequency, most of the incident wave is 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...

Claims

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Application Information

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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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