Simulation of electromagnetic radiation and scattering phenomena by multi-region FDTD (finite-difference time-domain)

• Main Authors: Ming-Yue Lu, 盧銘悅
• Other Authors: Jiun-Hwa Lin
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/11936792697959875448

碩士 === 國立臺灣海洋大學 === 電機工程學系 === 93 === The efficiency of finite-difference time-domain (FDTD) method is compromised by the grid limitation and its memory requirement in analyzing electromagnetic problems. Therefore, we develop the multi-region FDTD (MR-FDTD) to avoid wasting computing time for large empty space; Furthermore the interactions among sub-regions in MR-FDTD setup can be accounted for by the Kirchhoff integral formula (KIF), which can be further accelerated by the plane-wave time-domain method (PWTD). To demonstrate the applicability of our new algorithm , we simulate problems with regions of different orientation or grid density. Both results indicate satisfactory accuracy and low computational demand.