共查询到17条相似文献,搜索用时 125 毫秒
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TDMEI在高速集成电路串扰分析中的应用 总被引:1,自引:1,他引:0
使用时域测度不变方程法(TDMEI)作为时域有限差分方法(FDTD)的吸收边界条件,提出了一种对高速集成电路中互连线的串扰进行分析的新方法。使用一阶TDMEI吸收边界条件可以充分发挥它与激励源无关的优点,减小计算量.同时保证一定的精度。数值计算结果表明了该方法在串扰分析中的有效性,与其方法及测量结果比较.一致性较好。 相似文献
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An efficient way to implement the surface impedance boundary conditions (SIBC) for the finite-difference time-domain (FDTD) method is presented in this paper. Surface impedance boundary conditions are first formulated for a lossy dielectric half-space in the frequency domain. The impedance function of a lossy medium is approximated with a series of first-order rational functions. Then, the resulting time-domain convolution integrals are computed using recursive formulas which are obtained by assuming that the fields are piecewise linear in time. Thus, the recursive formulas derived here are second-order accurate. Unlike a previously published method [7] which requires preprocessing to compute the exponential approximation prior to the FDTD simulation, the preprocessing time is eliminated by performing a rational approximation on the normalized frequency-domain impedance. This approximation is independent of material properties, and the results are tabulated for reference. The implementation of the SIBC for a PEC-backed lossy dielectric shell is also introduced 相似文献
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Surface impedance concepts are introduced into the finite-difference time-domain (FDTD) method. Lossy conductors are replaced by surface impedance boundary conditions (SIBC), reducing the solution space and producing significant computational savings. Specifically, a SIBC is developed to replace a lossy dielectric half-space. An efficient implementation of this FDTD-SIBC based on the recursive properties of convolution with exponentials is presented. Finally, three problems are studied to illustrate the accuracy of the FDTD-SIBC formulation: a plane wave incident on a lossy dielectric half-space, a line current over a lossy dielectric half-space, and wave propagation in a parallel-plate waveguide with lossy walls 相似文献
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有损土壤上的多导体传输线的时域分析 总被引:6,自引:2,他引:4
将多导体传输线(MTL)的土壤复数阻抗拓展为土壤运算阻抗,采用Pade展开法,提出了计及土壤影响的多导体传输线的时域模型,建立了该模型的时域有限差分(FDTD)算法。通过对计及土壤影响的架空单导体和双导体传输线的波过程计算,表明本文方法的正确性,并可以应用于超高压变电站高压母线和超高压输电线路的瞬态电磁干扰计算。 相似文献
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在高频波段(2~30MHz),由于天线架设在环境复杂中,计算其辐射特性和电磁波传播特性非常困难,少有文献对此进行分析.随着高频技术的发展,这一现实问题迫切需要解决.本文用时域有限差分法(Finite Difference Time Domain)对这类问题进行了分析计算.文章计算了架设在有损地面上的单极天线辐射特性,并分析了架设海岸边的单极天线辐射的电磁波经过一段有损陆地后,其远区电磁场随陆地距离的变化特性.在计算中引入了表面阻抗法概念,使计算量和存储空间大为降低. 相似文献
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本文分析在地面上放置冲激函数源情况地下电磁场的传播和散射特性.在冲激函数源的后期由于电磁场变化较缓慢位移电流可以忽略,扩散特性占据优势.本文通过在准静态Maxwell方程中引进虚拟位移电流项,将扩散问题的求解转化为波动问题,从而应用非均匀时域有限差分(FDTD)方法来分析地下问题.计算结果表明本文方法的有效性. 相似文献