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Omnidirectional perfectly matched transparent material conforming to uniaxial perfectly matched layer model

A technology of perfect matching layer and transparent material, applied in the field of artificial medium, can solve the problem of decreased transmission efficiency, and achieve the effect of light weight, simple structure and thin thickness

Active Publication Date: 2019-10-25
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, traditional artificial frequency selective surfaces can only work under the condition of normal incidence, and the transmission efficiency drops sharply with the increase of the incident angle.

Method used

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  • Omnidirectional perfectly matched transparent material conforming to uniaxial perfectly matched layer model
  • Omnidirectional perfectly matched transparent material conforming to uniaxial perfectly matched layer model
  • Omnidirectional perfectly matched transparent material conforming to uniaxial perfectly matched layer model

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specific Embodiment

[0027] Such as figure 2 As shown, in the present invention, an equilateral triangle with a side length of 10 mm is used as a triangular sub-wavelength unit to obtain a free space full-angle perfect matching transparent material arranged in an array. In this embodiment, the thickness of the triangular metal copper ring is 0.035mm, the length of three sides is equal to 10mm, and the width of the side is 0.98mm, which mainly plays the role of adjusting the dielectric constant. The metal copper cylinder is 7mm high and has a radius of 1.878mm, which mainly plays the role of adjusting the magnetic permeability. The thickness of the two layers of PTFT medium is 5mm, the relative permittivity is 3.3, the relative permeability is 1, and the loss tangent angle is 0.003. Such as figure 1 As shown, w=0.98mm, r=1.878mm, h=7mm, p=10mm, t=10.035mm.

[0028] Simulation results such as image 3 As shown, the omnidirectional perfectly matched transparent material conforming to the uniaxia...

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Abstract

The invention discloses an omnidirectional perfectly matched transparent material conforming to a uniaxial perfectly matched layer model. The transparent material comprises at least one triangular sub-wavelength unit. Each sub-wavelength unit comprises a first dielectric plate, a triangular metal copper ring and a second dielectric plate which are superposed in turn, and a cylinder is embedded into the two dielectric plates. By adjusting the physical dimensions of the transparent material, the equivalent relative dielectric constant and permeability of the transparent material meet the diag (a, a, 1 / a) form. The equivalent wave impedance of the transparent material is perfectly matched with the free space, and the incident TE polarized electromagnetic wave can pass through the material completely without reflection. The transparent material is simple, thin and light, is perfectly matched with the free space, and can be widely used in electromagnetic compatibility, anti-electromagnetic-interference and other fields.

Description

technical field [0001] The invention belongs to the field of artificial media, and in particular relates to an omnidirectional perfect matching transparent material conforming to a uniaxial perfect matching layer model realized based on an artificial electromagnetic medium construction method. Background technique [0002] With the development of radar systems, especially in the military, the requirements for radar system invisibility are getting higher and higher, and frequency selective surface (Frequency Selective Surface, FSS for short) equipment becomes more and more important. FSS is usually formed by a planar two-dimensional periodic structure. Its basic electromagnetic characteristics are that it has frequency selective characteristics for electromagnetic waves with different operating frequencies, polarization states and incident angles. In addition, it also has a protective effect on the equipment itself, such as preventing Rain erosion and corrosion, etc. [0003...

Claims

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Application Information

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IPC IPC(8): H01Q15/00
CPCH01Q15/0013H01Q15/0026
Inventor 胡晓俊皇甫江涛冉立新叶德信
Owner ZHEJIANG UNIV
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