The author has been investigating the problems of accelerating, through the use of GPGPU, FDTD simulator solvers for analyzing MMIC passive element circuit characteristics. This report presents an FDTD algorithm using GPGPU that can perform field calculation in the region with absorbing boundary layers of CFSPML (Complex Frequency Shifted Perfectly Matched Layer) and also obtain S parameter values based on voltages and currents on the input and output lines. Even if field distribution data on several planes at some three time steps are additionally calculated, the total computation time required is at least several times shorter than for the GPU-less calculation.%筆者はMMIC受動素子回路特性解析FDTDシミュレータソルバをGPU利用で高速化する課題に取り組んでいる.本報告では吸収層としてCFSPML(Complex Frequency Shifted Perfectly Matched Layer)を用いた場合の電磁界計算および入出力線路上の電圧，電流からのSパラメータの算出が可能なGPGPU利用FDTDアルゴリズムを紹介する.計算時間は，特定時間の3ステップにおける断面内電磁界分布データの取得を加えたとしてもGPUを用いない場合に比べ数倍程度以上は高速化できる.
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