Magnetoelectric coupling metamaterial constitutive matrix obtaining method

Abstract

The invention relates to a magnetoelectric coupling metamaterial constitutive matrix obtaining method. In theoretical application, an electromagnetic metamaterial coupling model is established, an expression of a coupling degree-based 2*2 constitutive matrix is obtained, and then, a coupling degree-based refractive index formula is deduced; in simulation, nonlinear fitting is adopted, when it is observed that a fitting error value is within an allowable error range (smaller than 0.1), the correctness of the coupling degree-based two-dimensional constitutive matrix expression and the refractive index formula which are obtained theoretically is verified, and then, the relationship curves of four physical quantities of the constitutive matrix and a working frequency can be obtained. With the magnetoelectric coupling metamaterial constitutive matrix obtaining method of the invention adopted, the frequency response curves of four constitutive parameters of a magnetoelectric coupling metamaterial are obtained, which is of great significance for the analyzing and understanding of the electromagnetic characteristics of the magnetoelectric coupling metamaterial.

Description

technical field [0001] The invention relates to a method for obtaining a constitutive matrix of a magnetoelectric coupling metamaterial. Background technique [0002] At present, the method of extracting the constitutive parameters of metamaterials by scattering parameters (S parameters) has attracted extensive attention because of its simple calculation and feasibility. The S-parameter method is based on the scattering parameters obtained from experiments or electromagnetic simulations to calculate the refractive index n and the normalized wave impedance z of the metamaterial, and then extract the equivalent dielectric constant (ε eff =n / z) and equivalent permeability (μ eff = nz). S-parameter methods are very effective for extracting metamaterial constitutive parameters if there is no cross-coupling or little coupling between the electric and magnetic resonant elements in the left-handed material. Because there is no magnetoelectric coupling or the magnetoelectric coupl...

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Problems solved by technology

[0003] The main problem to be solved by the present invention is that, aiming at the defect that the constitutive parameters obtained by the existing S-parameter acquisition method cannot fully describe the electromagnetic properties of magnetoelectric coupling metamaterials, it provides a more accurate description of the magnetoelectric coupling in the presence of coupling. Methods for coupling electromagnetic properties of metamaterials

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