將時域電場積分方程法和普朗尼方法結合，求解了任意細線結構的瞬態電磁響應問題。時域電場積分方程法用以計算早期響應，普朗尼方法從早期響應中提取極點，得到后期響應。避免了傳統時域積分方程在后期響應求解的不穩定性，提高了瞬態響應求解的效率。以線天線、環天線為例，計算了在高斯脈沖激勵下的電流響應。
關 鍵 詞 時域積分方程; 普朗尼方法; 瞬態響應; 細線結構

Abstract Prony’s method has been combined with time domain integral equation (TDIE) to solve transient response from arbitrary thin wire structure. Early-time response is calculated by TDIE. Prony’s method is used to extract the pole from early-time response, the late-time response can be calculated efficiently. The present method avoids tedious computations in conventional TDIE, the efficiency of solving the transient response is speed up greatly. The current distributions on conducting straight wire and a circular loop excited by a Gaussian pulse are computed.
Key words time domain integral equations; Prony’s method; transient response; thin wire structure