TY - GEN
T1 - A Comparative Study on Interpolation and Anterpolation Schemes of MLFMA for Electromagnetic Scattering by Low RCS Objects
AU - Li, Zi Chen
AU - He, Wei Jia
AU - Tao, Li
AU - Wu, Bi Yi
AU - Yang, Ming Lin
AU - Sheng, Xin Qing
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - A Comparative study is performed in this paper on the accuracy of global spectrum, local bicubic and local Lagrangian polynomial inter-/anterpolation schemes when the multilevel fast multipole algorithm (MLFMA) is used to compute EM scattering by objects with low RCS. For a specially designed low RCS object, we show that the accuracy of conventional local interpolation schemes using 4 × 4 samples, the bicubic, the lowerorder Lagrangian polynomial, etc., cannot be promised. To remedy this, a higher-order local Lagrangian polynomial interpolation is used. Numerical results demonstrate that the introduced higher-order local interpolation can achieve accuracy comparable to global spectrum interpolation, while maintaining efficiency and sparsity characteristics of local schemes.
AB - A Comparative study is performed in this paper on the accuracy of global spectrum, local bicubic and local Lagrangian polynomial inter-/anterpolation schemes when the multilevel fast multipole algorithm (MLFMA) is used to compute EM scattering by objects with low RCS. For a specially designed low RCS object, we show that the accuracy of conventional local interpolation schemes using 4 × 4 samples, the bicubic, the lowerorder Lagrangian polynomial, etc., cannot be promised. To remedy this, a higher-order local Lagrangian polynomial interpolation is used. Numerical results demonstrate that the introduced higher-order local interpolation can achieve accuracy comparable to global spectrum interpolation, while maintaining efficiency and sparsity characteristics of local schemes.
KW - higher-order Lagrangian interpolation
KW - low radar cross section (RCS)
KW - multilevel fast multipole algorithm (MLFMA)
KW - surface integral equation
UR - https://www.scopus.com/pages/publications/105022616177
U2 - 10.1109/NEMO62710.2025.11215523
DO - 10.1109/NEMO62710.2025.11215523
M3 - Conference contribution
AN - SCOPUS:105022616177
T3 - IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings
BT - IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2025 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025
Y2 - 29 July 2025 through 1 August 2025
ER -