將時(shí)域電場(chǎng)積分方程法和普朗尼方法結(jié)合，求解了任意細(xì)線結(jié)構(gòu)的瞬態(tài)電磁響應(yīng)問(wèn)題。時(shí)域電場(chǎng)積分方程法用以計(jì)算早期響應(yīng)，普朗尼方法從早期響應(yīng)中提取極點(diǎn)，得到后期響應(yīng)。避免了傳統(tǒng)時(shí)域積分方程在后期響應(yīng)求解的不穩(wěn)定性，提高了瞬態(tài)響應(yīng)求解的效率。以線天線、環(huán)天線為例，計(jì)算了在高斯脈沖激勵(lì)下的電流響應(yīng)。
關(guān) 鍵 詞 時(shí)域積分方程; 普朗尼方法; 瞬態(tài)響應(yīng); 細(xì)線結(jié)構(gòu)

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