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Method for calculating equivalent electromagnetic parameters of wave absorbing honeycomb structure

A technology of equivalent electromagnetic parameters and calculation methods, applied in the field of electromagnetism, can solve the problem that the calculation results cannot reflect the dispersion characteristics of equivalent electromagnetic parameters, etc.

Active Publication Date: 2016-06-29
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a calculation method of the equivalent electromagnetic parameters of the honeycomb wave-absorbing structure, which solves the problem that the calculation results obtained by the existing calculation methods cannot reflect the dispersion characteristics of the equivalent electromagnetic parameters

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  • Method for calculating equivalent electromagnetic parameters of wave absorbing honeycomb structure
  • Method for calculating equivalent electromagnetic parameters of wave absorbing honeycomb structure
  • Method for calculating equivalent electromagnetic parameters of wave absorbing honeycomb structure

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Embodiment

[0208] In order to illustrate the specific implementation steps of the calculation method of the equivalent electromagnetic parameters of a honeycomb absorbing structure of the present invention, and to verify the correctness of the calculation method of the present invention, a specific test experiment and results of the equivalent electromagnetic parameters of the honeycomb absorbing structure are given . Schematic diagram of the structural parameters and coordinates of the honeycomb absorbing structure as shown in figure 2 As shown, both the skeleton material and the filling material of the honeycomb structure can be considered as homogeneous isotropic materials, where the electromagnetic parameter of the skeleton material is ε a and μ a , the electromagnetic parameter of the filling material is ε b and μ b . The proportionality factor w / r represents the ratio of the thickness of the skeleton material to the aperture size of the honeycomb unit. The two-dimensional per...

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Abstract

The invention discloses a method for calculating equivalent electromagnetic parameters of a wave absorbing honeycomb structure. The method specifically comprises the following steps: 1. deriving a strong perturbation theory framework; 2. substituting the electromagnetic parameters and structural parameters of the wave absorbing honeycomb structure into the strong perturbation theory framework in step 1 to obtain a substantially closed-form expression of effective permittivity tensor (shown in the description) and equivalent permeability tensor ( shown in the description) of the wave absorbing honeycomb structure, wherein the expression consists of an initial value part and a dispersion characteristic function; 3. expanding the initial value part obtained in step 2 , and simplifying a dispersion characteristic function expression to obtain a final closed-form expression for calculating the equivalent electromagnetic parameters of the wave absorbing honeycomb structure. Compared with the traditional calculation method, the method provided by the invention can reflect the dispersion characteristic of the equivalent electromagnetic parameters, and can be used for calculating the equivalent electromagnetic parameters of the wave absorbing honeycomb structure more accurately within a relatively wide frequency band.

Description

technical field [0001] The invention belongs to the technical field of electromagnetism, and in particular relates to a method for calculating equivalent electromagnetic parameters of a honeycomb wave-absorbing structure. Background technique [0002] The radar absorbing structure is a multifunctional material developed on the basis of traditional radar absorbing materials, which has both absorbing performance and bearing capacity. Honeycomb radar absorbing structure, also known as honeycomb absorbing structure, has been occupying a very important position in the research of radar absorbing structure because of its advantages of light weight, high strength and low density. The full-wave method represented by the method of moments (Method of Moment, MoM), finite-difference time-domain method (FDTD), etc. is an important method for calculating the electromagnetic response of cellular absorbing structures, although such numerical methods The accuracy is higher, but the higher ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/00
Inventor 赵雨辰张金生刘江凡宋忠国席晓莉
Owner XIAN UNIV OF TECH
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