An efficient one-dimensional time-domain algorithm for obliquely incident plane wave in BOR-SMRTD

Article type: Research Article

Authors: Li, Guohui^a | Liu, Yawen^b; | Zhang, Bo^b

Affiliations: [a] College of Mathematics and Information Science, Weifang University, Weifang, China | [b] Army Engineering University of PLA, Nanjing, China

Correspondence: [*] Corresponding author: Yawen Liu, Army Engineering University of PLA, Nanjing 210007, China. E-mail: [email protected]

Abstract: In this paper, the concept of body of revolution (BOR) finite-difference time-domain method time-domain (BOR-FDTD) method is applied to symplectic multi-resolution time-domain (SMRTD) algorithm to propose a BOR-SMRTD method. In order to solve the problem that the obliquely incident pulse wave cannot be directly introduced into BOR-SMRTD method, an efficient one-dimensional time-domain algorithm for propagating obliquely incident pulse plane wave in BOR-SMRTD method is also proposed. The numerical results show that the proposed algorithm runs 51 times faster than the algorithm based on fast Fourier transform (FFT) completely. Moreover, the scattering problem of a perfect electric conductor (PEC) cylinder with finite length is calculated to verify the effectiveness of the algorithm. The surface current density distribution along a generatrix of the cylinder at a giving frequency was extracted, and the results are in good agreement with that obtained with the methods of moment (MoM) and BOR-FDTD. Finally, the radar cross section (RCS) of a PEC sphere was calculated, and the results agree well with the theoretical values.

Keywords: Body of revolution, symplectic multi-resolution time-domain, FFT

DOI: 10.3233/JAE-201534

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 65, no. 2, pp. 405-415, 2021