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Water or aqueous solution based design method for metamaterial frequency selective surface

A frequency selective surface and design method technology, applied in the direction of electrical components, circuits, waveguide devices, etc., can solve the problems of long production cycle, insufficient performance, high cost, etc., and achieve easy processing and repair, simple preparation process, and production process The effect of environmental protection

Active Publication Date: 2016-12-07
AIR FORCE UNIV PLA
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  • Abstract
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AI Technical Summary

Problems solved by technology

Due to the limitations of the physical properties of metal materials, the metal element frequency selective surface is not good enough in terms of low detectability and corrosion resistance, and it cannot meet the needs of high-tech indicators such as navigation and military.
Dielectric materials with high dielectric constant can be used to design band-pass and band-stop frequency selective surfaces, but the production cycle is long and the cost is high. Although it can solve the problems of oxidation resistance, high temperature resistance, and corrosion resistance, the original design form still exists Difficult to change, difficult to repair after damage, etc.

Method used

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  • Water or aqueous solution based design method for metamaterial frequency selective surface
  • Water or aqueous solution based design method for metamaterial frequency selective surface
  • Water or aqueous solution based design method for metamaterial frequency selective surface

Examples

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example 1

[0054] see figure 1 , This example uses a cubic array structure, a=28mm, b=28mm, d=35mm, Px=38mm, Py=38mm in the model diagram. see figure 2 , the working frequency band of the frequency selective surface stop band is 0.895-1.205GHz. The raw materials used include 3D printed photosensitive resin materials with low dielectric constant that have little effect on electromagnetic waves, and distilled water.

[0055] The preparation process for this example is:

[0056] (1) Test the dielectric constant and dielectric loss of distilled water at different temperatures and frequencies with a vector network analyzer and coaxial probe test accessories.

[0057] (2) Select appropriate temperature and structural parameters for the required working frequency band.

[0058] (3) This example is applied at a room temperature of 25°C, the frequency range is 0.6-1.6GHz, and the relative permittivity of water is about 78. Use electromagnetic simulation software for simulation calculations,...

example 2

[0063] see Figure 4 , This example uses a fishnet structure, a=16mm, b=20mm, d=9.6mm, Px=20mm, Py=20mm in the model diagram. see Figure 5 , the working frequency band of the frequency selective surface stop band is 0.56-1.56GHz. The raw materials used include 3D printed photosensitive resin materials with low dielectric constant that have little effect on electromagnetic waves, and distilled water.

[0064] The preparation process for this example is:

[0065] (1) Test the dielectric constant and dielectric loss of distilled water at different temperatures and frequencies with a vector network analyzer and coaxial probe test accessories.

[0066] (2) Select appropriate temperature and structural parameters for the required working frequency band.

[0067] (3) This example is applied at a room temperature of 25°C, the frequency range is 0.1-2.4GHz, and the relative permittivity of water is about 78. Use electromagnetic simulation software for simulation calculations, opt...

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Abstract

The invention discloses a water or aqueous solution based design method for a metamaterial frequency selective surface. The design method is characterized in that structural design is performed on a geometric profile of a water or aqueous solution by means of dielectric property of the water or aqueous solution, during fabrication, a low-dielectric constant dielectric material is fabricated to a die with a special shape by a 3D printing technology, a machining technology or other processing means, the water or aqueous solution is poured to the die to form a special shape, the water or aqueous solution and the die integratedly form metamaterial frequency selective surface having sub-wavelength structure characteristic, and the band-pass or band-stop frequency selective characteristic of an electromagnetic wave in a wide electromagnetic frequency band is achieved by setting parameters such as the geometric profile and the size of the water or aqueous solution. The design method has the advantages of simple fabrication process and low fabrication cost, local materials can be used during fabrication of a device, and a function that the metamaterial frequency selective surface can be restored is possessed.

Description

technical field [0001] The invention relates to the technical field of electromagnetic frequency selective surfaces, in particular to a design method of a metamaterial frequency selective surface based on water or an aqueous solution. Background technique [0002] Frequency Selective Surface (FSS) is a spatial filter that can exhibit one or more band-pass and band-stop characteristics for electromagnetic waves incident on it, and has a frequency-selective filtering effect on electromagnetic waves. In general, a typical frequency selective surface is a two-dimensional or three-dimensional periodic structure composed of periodically arranged metal patch units or apertures periodically opened on a metal screen. Because of its specific frequency selection characteristics, it can be widely used in the fields of radar radomes and antenna reflectors in microwave, infrared and other frequency bands. Most of the current frequency selective surfaces are designed based on metallic str...

Claims

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Application Information

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IPC IPC(8): H01P1/20
CPCH01P1/2002
Inventor 王军李立扬王甲富屈绍波马华冯明德闫明宝
Owner AIR FORCE UNIV PLA
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