An efficient adaptive h‐refinement for the RWG‐based electric field integral equation applied to antennas with waveport

• Published in: IET microwaves, antennas & propagation Vol. 18; no. 3; pp. 155 - 163
• Main Authors: Ding, Ning, Yin, Lei, Zhao, Xunwang, Lin, ZhongChao, Zhang, Yu, Luo, Aiwen, Dang, Xiaojie
• Format: Journal Article
• Language: English
• Published: Wiley 01.03.2024
• Subjects: electric field integral equations; method of moments
• ISSN: 1751-8725; 1751-8733
• DOI: 10.1049/mia2.12454

An approximation scheme that combines approximate solutions with error estimators to accelerate the adaptive h‐refinement of the RWG‐based method of moments (MoM) with the electric field integral equation (EFIE) is presented. The scheme is effectively implemented by using the near‐field matrix to solve the approximate solution. Several conventional error estimators incorporated with the scheme are investigated. Compared to using the full MoM system, it significantly reduces the computational cost while maintaining the refinement effect. Numerical results indicate that the scheme could accelerate the adaptive refinement, yielding significant reductions in computational time and memory requirements. An approximate scheme is introduced to improve the efficiency of the error estimation to accelerate the adaptive h‐refinement of RWG‐based MoM with EFIE. The adaptive refinement of antennas with waveport incorporated with the scheme is simulated to verify the efficiency of the method.