【作者】 贾苗苗； 赵延文； 刘涛；

【Author】 Jia Miaomiao;Zhao Yanwen;Liu tao;School of Electronic Engineering,University of Electronic Science and Technology of China;

【机构】 电子科技大学电子工程学院；

【摘要】 为获得时域阻抗矩阵元素需要分别计算场单元和源单元上的空时积分,由于时间基函数的分域性以及时间基函数(如三角型时间基函数)导数的不连续性,使得采用高斯积分方法计算源单元上空时积分的计算精度差且误差随着时间步长的减小而增大。本文将源单元上空时积分转变成为可解析计算的1D时间卷积积分和1D空间积分,通过解析地计算这两种1D积分获得了精确的时域阻抗矩阵并利用时间步进(MOT)算法求解了时域电场积分方程。通过计算实例表明,该方法能够同时确保时域电场积分方程时间步进算法求解的高精确性和后时稳定性。更多还原

【Abstract】 it needs to respectively compute the space-time integrals in the field cell and the source cell to evaluate the time-domain impedance matrix elements. Because of temporal basis function’s regionality and its derivative’s uncontinuity(such as the triangle temporal basis function),the accuracy of space-time integral in the source cell is worse by method of the gauss integral and the error increases when time interval gets narrow. The paper accurately computes time-domain impedance matrix elements by transforming space-time integral of the source cell to 1 D time convolution and 1 D space analytical integral and further solves time-domain electric field,by the method of marching-on-in-time. Numerical results show that the proposed method ensures that the solution of timedomain integral equation using marching-on-in-time method is stable and accurate.更多还原