研究目的
To propose a flexible procedure to avoid the boundary materials singularities in 2D transformation-based cloaks by using two different constants to define the out-of-plane stretching, resulting in anisotropic materials with lower values and better scattering reduction for a given incident wave direction.
研究成果
The proposed method of using two different constants for out-of-plane stretching in 2D cloaks can result in anisotropic materials with lower values and better scattering reduction for a given incident wave direction. This approach provides more flexibility in the cloak design and can be optimized for specific applications.
研究不足
The study is limited to 2D cloaks and specific geometries (elliptical cylinders). The performance of the cloak is evaluated for a fixed direction of incidence, and the practical realization of the proposed materials may face challenges.
1：Experimental Design and Method Selection:
The study involves numerical simulations of elliptical cylinders to evaluate the effectiveness of using two different constants for out-of-plane stretching in avoiding singular materials in 2D electromagnetic cloaks. The methodology includes solving the Laplace equation for the coordinates involved and calculating the relative permittivity and permeability tensors.
2：Sample Selection and Data Sources:
The samples are z-invariant cylindrical objects with elliptical cross-section, assumed to be Perfect Electrical Conductors. Three cases are tested with varying eccentricities.
3：List of Experimental Equipment and Materials:
The computational domain is bounded by Perfect Matched Layers (PML), and the simulations are performed using COMSOL Multiphysics and MATLAB software packages.
4：Experimental Procedures and Operational Workflow:
The study involves a parametric study of constants defining the out-of-plane stretching, with the FEM mesh used to represent the cloak domain and interpolate its ideally continuous material.
5：Data Analysis Methods:
The total scattering cross-width is used to evaluate the invisibility, and the results are analyzed to compare the performance of the cloaks under different configurations.
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