HIE－FDTD法とCFDTD法を用いた斜め配線パターンの効果的な電磁界シミュレーション

摘要

Due to orthogonal grids in conventional finite-difference time-domain (FDTD) methods, difficulty in modeling a complicated structure induces incomplete discretization of space. In addition, computational cost increases as a grid spacing decreases. Therefore, it is inherently difficult to analyze thin structures such as a printed circuit board (PCB) and curved or angled objects such as interconnection patterns on the PCB. In this report, we propose an effective electromagnetic field analysis technique which is constructed by combining the hybrid implicit-explicit (HIE)-FDTD method and the conformal FDTD (CFDTD) method. The proposed technique can circumvent the above problems by exploiting advantages of the HIE-FDTD method and the CFDTD method. An example model of the interconnection pattern is analyzed by the proposed and conventional methods, and we estimate the accuracy and CPU time of the proposed one.%FDTD（Finite-Diffrence Time-Domain）法では，空間の離散化に直交格子を用いるため，複雑な構造物を精度良く離散化することが難しく，また，格子間隔が小さいほど計算コストが増大するという問題がある．そのため，プリント基板のような薄い構造物や，斜め配線のような直交格子からずれる解析対象を効率的に解析することが困難である・本稿では，HIE（Hybrid Implicit-Explicit）-FDTD法とCFDTD（Conformal FDTD）法を組み合わせることで，プリント基板上に配置された斜め配線の電磁界解析を効果的に行えることを示す．