期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 70, 期 9, 页码 8242-8249出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3177560
关键词
Method of moments; Impedance; Manganese; Surface impedance; Magnetic moments; Electromagnetic scattering; Perpendicular magnetic anisotropy; Electromagnetic scattering; equivalent dipole moment (EDM); high-order impedance boundary condition (HOIBC); iterative method; method of moment (MoM)
资金
- National Natural Science Foundation of China [62071089]
- Sichuan Science and Technology Program [2021ZYD0040]
This work proposes an efficient hybrid method that combines the efficient iterative method of moments-physical optics and the equivalent dipole moment with the high-order impedance boundary condition for the study of electromagnetic scattering from objects with isotropic or anisotropic surface coatings. Numerical results demonstrate that this hybrid method significantly reduces computation time and agrees well with traditional methods.
This work proposes an efficient hybrid method consisting of the efficient iterative method of moments-physical optics (EI-MoM-PO) and the equivalent dipole moment (EDM) with the high-order impedance boundary condition (HOIBC) to explore the electromagnetic scattering from the object with an isotropic or anisotropic surface coating. By introducing the HOIBC into the EDM method, the relationship between the equivalent electric and magnetic dipole moments is established. Therefore, the EDM method is extended to general cases. For the composite scattering from electrically large objects including MoM and PO regions, the EDM method is implemented to fill the MoM impedance matrix and to accelerate the evaluation of the coupling between the MoM and PO regions, which considerably improves the computing efficiency. The numerical results indicate that the proposed hybrid method allows for a substantial decrease in computation time. Also, they also agree well with the traditional finite element method, MoM, or MoM-PO method, which proves the validity of the proposed method.
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