电波科学学报2024，Vol.39Issue(6)：1067-1072,6.DOI:10.12265/j.cjors.2023293
粗糙面瞬态近场散射的SARC-TDPO方法
SARC-TDPO algorithm for analysis of transient near-field scattering from rough surface
摘要
Abstract
A hybrid algorithm combining the semianalytical recursive convolution(SARC)with time-domain physical optics(TDPO)is proposed to decrease the resource consumption in computing the transient near-field scattering from rough surface using the full-wave approaches.In this hybrid algorithm,the computing work is divided into the TDPO solution of the equivalent resource on rough surface and the calculation of the near-field radiation with the time-domain Huygens'principle.The SARC is presented to improve the efficiency for solving the time-domain convolution of equivalent source and Green's function in the near-field radiating analysis based on the idea of the digital signal processing.Firstly,the time-domain Green's function in the Huygens'principle is approximated as a sum of exponential functions by applying Prony method,and then the SARC is applied to update the time-domain convolution to obtain the transient radiation from the equivalent resource on rough surface.The proposed SARC-TDPO algorithm is used to obtain the transient near fields scattered from a sea surface with the Pierson-Moscowitz(PM)spectrum.And this hybrid algorithm is verified through the comparison with the scattering near fields computed by the traditional finite-difference time-domain(FDTD)method.The results show that calculating efficiency of the proposed algorithm can be significantly improved and the precision can also be guaranteed.Moreover,the further the field point away from rough surface,the higher the relative efficiency is.关键词
瞬态近场散射/粗糙面/时域物理光学(TDPO)法/半解析递归卷积(SARC)方案Key words
transient near-field scattering/rough surface/time domain physical optics(TDPO)method/semianalytical recursive convolution(SARC)scheme分类
信息技术与安全科学引用本文复制引用
田炜,杨鹏举,赵晔,杜欣悦..粗糙面瞬态近场散射的SARC-TDPO方法[J].电波科学学报,2024,39(6):1067-1072,6.基金项目
国家自然科学基金(62361054,62261054,62061048) （62361054,62261054,62061048）
陕西省自然科学基础研究计划项目(2023-JC-YB-539) （2023-JC-YB-539）
榆林市产学研合作项目(CXY-2022-188) （CXY-2022-188）
大学生创新创业训练计划项目(S202210719109) （S202210719109）
