AUTHOR=Yuan Xiaohui , Ma Yujing , Huang Yajun , Huo Ruijin , Wang Zhongwang 

TITLE=The method of moments for electromagnetic scattering analysis accelerated by the polynomial chaos expansion in infinite domains

JOURNAL=Frontiers in Physics

VOLUME=11

YEAR=2023

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2023.1178466

DOI=10.3389/fphy.2023.1178466

ISSN=2296-424X

ABSTRACT=<p>An efficient method of moments (MoM) based on polynomial chaos expansion (PCE) is applied to quickly calculate the electromagnetic scattering problems. The triangle basic functions are used to discretize the surface integral equations. The polynomial chaos expansion is utilized to accelerate the MoM by constructing a surrogate model for univariate and bivariate analysis. The mathematical expressions of the surrogate model for the radar cross-section (RCS) are established by considering uncertain parameters such as bistatic angle, incident frequency, and dielectric constant. By using the example of a scattering cylinder with analytical solution, it is verified that the MoM accelerated by PCE presents a considerable advantage in computational expense and speed.</p>