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To calculate the scattering from thin dielectric-coated perfect electric conductor (PEC) surfaces, the impedance boundary conditions (IBC) and thin dielectric sheet (TDS) approximation are quite powerful in integral equation method because both remove the need to solve the field in dielectric layer. However, the rigid validation criteria restrict the application scope of IBC method. Although the TDS...
The efficient calculation of the electromagnetic interactions with dielectric objects is always a challenge to CEM (computational electromagnetics). Among the numerical exact methods, the method of moment (MoM) is considered to be more preferable than finite element method (FEM) and finite difference method (FDTD) for its high precision and discretization on the geometry model instead of the field...
In this paper, MLFMA is implemented in the IEFIE to compute scattering from complex conducting structure coated by thin dielectric material. Numerical results demonstrate the efficiency and validity of the present method.
Complex permittivity is one of the most important parameters of microwave dielectrics. When the dielectrics work in high temperature environments, the complex permittivity as a function of temperature should be measured while designing dielectrics and applying in microwave devices or radome. A test cavity used at temperature up to 1500degC is designed and fabricated, and the test system for complex...
In this paper, firstly, the combined field integral equation (CFIE) of hybrid PEC-dielectric formulation is derived to speed up the iteration. Then, the PE bases, combined with the multilevel fast multipole algorithm (MLFMA), are introduced to efficiently solve the scattering of electrically large metallic objects coated with dielectric sheet. Several numerical examples have been given to show the...
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