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Single-frequency/dual-frequency electromagnetic ultra-medium wave absorbing material

A technology of electromagnetic meta-dielectric and wave-absorbing materials, applied in the direction of electrical components, antennas, etc., can solve the problem that electromagnetic meta-media wave-absorbing materials cannot realize the conversion of single-frequency/multi-frequency working frequency bands

Active Publication Date: 2013-02-13
四川电子科技大学教育发展基金会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing electromagnetic super-dielectric wave-absorbing materials cannot realize the conversion of single-frequency / multi-frequency working frequency bands, and provide an electromagnetic super-dielectric wave-absorbing material that realizes single-frequency / dual-frequency working frequency band conversion and intelligent control of dual-frequency bands Material

Method used

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  • Single-frequency/dual-frequency electromagnetic ultra-medium wave absorbing material
  • Single-frequency/dual-frequency electromagnetic ultra-medium wave absorbing material
  • Single-frequency/dual-frequency electromagnetic ultra-medium wave absorbing material

Examples

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Embodiment 1

[0022] Using circuit board etching technology, a periodic arrangement of snowflake-like metal resonant structures is etched on one side of the FR4 board with a thickness of 0.836mm (according to the designed pattern, after the excess metal copper on the surface is etched away, the remaining copper is snowflake-shaped metal resonant structure), in which the main arm of the resonant structure unit is long L 1 =5.8mm, L 2 =6.0mm, L 3 Change from 6.0mm to 4.4mm in steps of 0.4mm, main arm width a =0.3mm, secondary arm arm length d =1.1mm, secondary arm width b =0.2mm, the distance from the secondary arm to the center c=1.65mm, the distance between adjacent resonant structure units is 8mm, the thickness of the snowflake-shaped metal resonant structure and the metal copper on the other side of the FR4 plate are both 0.018mm. Five sets of samples were prepared, and their absorption rate simulation and test results are as follows: figure 2As shown, where (a) is the numeri...

Embodiment 2

[0024] Using circuit board etching technology, a snowflake-shaped metal resonant structure arranged periodically is etched on one side of the FR4 plate with a thickness of 0.836mm (the method is the same as that in Example 1), wherein the main arm of the resonant structure unit is long L 1 =5.8mm, L 3 =4.4mm, L 2 Change from 4.4mm to 6.0mm in steps of 0.4mm, main arm width a =0.3mm, secondary arm arm length d =1.1mm, secondary arm width b =0.2mm, the distance between the secondary arm and the center c=1.65mm, the distance between adjacent resonant structure units is 8mm, the thickness of the snowflake-shaped metal resonant structure and the metal copper on the other side of the FR4 plate are both 0.018mm. Five sets of samples were prepared, and their absorption rate simulation and test results are as follows: image 3 As shown, where (a) is the numerical simulation result, and (b) is the sample test result. Depend on image 3 (a) It can be seen that L 2 =4.4mm, ...

Embodiment 3

[0026] Using circuit board etching technology, a snowflake-shaped metal resonant structure arranged periodically is etched on one side of the FR4 plate with a thickness of 0.836mm (the method is the same as that in Example 1), wherein the main arm of the resonant structure unit is long L 2 =6.0mm, L 3 =4.4mm, L 1 From 5.8mm to 4.6mm in steps of 0.4mm, the main arm width a=0.3mm, the secondary arm length d=1.1mm, the secondary arm width b=0.2mm, the distance from the secondary arm to the center c= 1.65mm, the spacing between adjacent resonant structure units is 8mm, the thickness of the snowflake-shaped metal resonant structure and the metal copper on the other side of the FR4 plate are both 0.018mm. Four groups of samples were prepared, and their absorption rate simulation and test results are as follows: Figure 4 As shown, where (a) is the numerical simulation result, and (b) is the sample test result. Depend on Figure 4 (a) It can be seen that there are two abso...

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Abstract

The invention discloses a single-frequency / dual-frequency electromagnetic ultra-medium wave absorbing material. According to the single-frequency / dual-frequency electromagnetic ultra-medium wave absorbing material, a substrate of the wave absorbing material is a PCB (Printed Circuit Board) substrate, and snowflake-shaped resonance structures which are periodically arranged are formed on one face of the PCB substrate through etching; each snowflake-shaped resonance structure is a hierarchical structure which consists of three primary arms and secondary arms on the primary arms, wherein the centers of the three primary arms are intersected at the same point, the three primary arms mutually form angles of 60 degrees, and at most two primary arms are equal in length; and the secondary arms on the primary arms are distributed in central symmetry. The single-frequency / dual-frequency electromagnetic ultra-medium wave absorbing material has the advantage that the conversion of single-frequency and dual-frequency and the intelligent adjustment on the working band of dual-frequency wave absorption can be realized in a microwave band through changing the length of resonant unit arms.

Description

technical field [0001] The invention belongs to the field of microwave electromagnetic materials, and in particular relates to an electromagnetic super-dielectric wave-absorbing material for realizing single-frequency / double-frequency conversion. Background technique [0002] In 2000, based on the idea of ​​constructing single negative permittivity metamaterials and single negative permeability metamaterials proposed by J.B. Pendry, D.R. Smith and others artificially synthesized the equivalent permittivity and equivalent permeability in the X-band for the first time. The negative negative refractive index microwave material realized the ideal negative refractive index material predicted by the former Soviet scientist V.G. Veselago in 1968. In 2008, Landy et al. proposed the concept of a perfect metadielectric absorbing material. Through reasonable design and parameter selection, this electromagnetic resonator metamaterial can separately couple the electromagnetic components ...

Claims

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Application Information

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IPC IPC(8): H01Q17/00
Inventor 文光俊黄勇军王黄腾龙
Owner 四川电子科技大学教育发展基金会