矩量法分析屏蔽导体内的多层介质多导体传输线

利用矩量法分析屏蔽导体内的多层介质多导体传输线。首先，建立该问题的算子方程；然后离散化算子方程，通过对导体和介质分界面的总电荷及介质和介质分界面自由电荷的自由空间二维格林函数分析，得出矩阵方程；最后得出屏蔽导体内多层介质中各导体的电容矩阵和电感矩阵。数值结果与现有类似结构分析结果相比较一致性较好。     

一种提取多层介质多导体互连电磁参数的快速算法：有限差分－不变性测试方程法

本文首次利用ＭＥＩ方法计算了多层介质多导体互连的电容和电感矩阵．由于引入了测试环的概念，避免了多层结构的格林函数的推导和Ｓｏｍｍｅｒｆｅｌｄ积分的计算，同时也去掉了传统ＭＥＩ方法中ＭＥＩ系数与几何形状有关的假设．计算结果表明：本文提出的算法正确，与常见的算法如矩量法，边界元法和有限元法等方法相比，计算速度大大加快，并且对结构的适应性强，可以分析截面为任意形状且导体有耗的互连，因此该方法是一种提取电磁参数的快速算法．在计算得到的电容和电感矩阵的基础上，本文还利用双重波形收敛法计算了端接非线性负载的多导体互连各端口的瞬态响应．     

多层介质多导体传输线的小波矩量法分析

全电荷格林函数法是解决分层介质的多导体传榆线的参数提取的一个通用有效的方法，但是用矩量法处理时需将导体表面和介质分界面一起剖分，系数矩阵的阶数较大，计算效率降低。详细分析了多层介质多导体传榆线，并在矩量法处理时引入小波变换，使原稠密系数矩阵变换为稀疏矩阵。从而提高了求解速度。     

一种分析微带交指滤波器的新思路

本文提出一种直接用耦合多导体多介质结构传输特性计算微波滤波器的方法，它不但考虑了相邻导体，也考虑了所有非相邻导体间的耦合，因此计算精度大大提高。此外，它还可以计算不对称耦合，适应面宽。分区均匀介质填充多导体结构有多个不同传播常数的本征模。这与均匀填充多导体结构有很大差别，即不但要考虑本征阻抗，而且要考虑不同的传播常数。本文用矩阵电报方程求出它们的本征值与本征矢量，从而求得传输特性，最后用网络等效方法优化求得滤波器特性。本文还介绍了由不同宽度谐振腔组成的滤波器的设计     

覆铜板文摘与专利（3）

一种覆铜板结构／CN101415296／何志球：黄吉军：郭瑞珂／广东汕头超声电子股份有限公司覆铜板厂 摘要：一种覆铜板结构，包括两层导体层，至少三层位于两层导体层之间的绝缘介质层，至少一层绝缘介质层为改进的绝缘介质层，     

MCM多层导体板频率响应的平面电路分析方法

MCM电源分配系统设计要求全频带目标阻抗维持在较小的范围内,使得瞬变电流不会引发过大的电压噪声。本文利用平面电路分析方法建立了MCM叠层多端口等效电路,并在此基础上推导了MCM多层导体板多端口阻抗频率响应,该方法在满足趋肤效应假设前提下对于高速数字系统是行之有效的。分别利用平面电路分析方法与传输矩阵方法计算了多层导体板MCM叠层端口自阻抗与互阻抗,计算结果得到了较为一致的吻合,从而验证了该方法的合理性。     

MLFMA分析复杂载体平台上天线问题

该文分析了导体介质复合结构平台上线天线的辐射问题。利用等效原理建立EFIE-PMCHW表面积分方程组,定义线、面和连接基函数描述复杂结构上电流分布,分析了导体介质分界面处基函数的处理：利用多层快速多极子方法（MLFMA）21速迭代求解过程中的矩阵矢量相乘运算,并用于有耗媒质求解。MLFMA的运用极大地提高了求解实际电大问题的能力。数值计算结果验证了方法的正确性和高效性。     

MLFMA分析复杂载体平台上天线问题

该文分析了导体介质复合结构平台上线天线的辐射问题。利用等效原理建立EFIE-PMCHW表面积分方程组,定义线、面和连接基函数描述复杂结构上电流分布,分析了导体介质分界面处基函数的处理;利用多层快速多极子方法(MLFMA)加速迭代求解过程中的矩阵矢量相乘运算,并用于有耗媒质求解。MLFMA的运用极大地提高了求解实际电大问题的能力。数值计算结果验证了方法的正确性和高效性。     

金属衬底多层吸波材料表面等效电磁流的研究

基于Maxwell方程的一阶状态矢量微分方程描述。推导出均匀平面波入射下金属衬底多层各向异性材料表面上等效电磁流的一般解析表达式及其相互关系。以此为基础给出了两层涂覆电大尺寸平板导体的散射结果，为我层各向异性材料涂覆导体目标电磁散射的近信计算提供了理论基础。     

一种提取多层介质多导体互连电磁参数的快速算法：有限差分—不变性测试…

本文首次利用ＭＥＩ方法计算了多层介质多层介质多导体互连的电容和电感矩阵。由于引入了测试环的概念，避免了多层结构的格林函数的推导和Ｓｏｍｍｅｒｆｅｌｄ积分的计算，同时也去年了传统ＭＥＩ方法中ＭＥＩ系数与几何形状有关的假设。计算结果表明：本文提出了算法正确，与常见的算法如矩量法，边界元法和有限元法等方法相比，计算速度大大加快，并且对结构的适应性强，可以分析截面为任意形状且导体有耗的互连，因此该方法是一     

Losses on Multiconductor Transmission Lines in Multilayered Dielectric Media

For the transmission-line modes, a multiconductor transmission line in a multilayered dielectric medium can be characterized by four matrix parameters the capacitance matrices [C], the inductance matrix [L], the shunt conductance matrix [G], and the series resistance matrix [R]. The first two matrices [C] and [L] can be obtained from equivalent electrostatic and magnetostatic problems. The conductance matrix [G] can be obtained by changing all dielectric constants epsilon/sub i/ to complex dielectric constants /angle over epsilon/sub i/ in the equivalent electrostatic problem. The resistance matrix [R] can be obtained by applying a perturbation method to each mode of the transmission line. A computer program has been written for an arbitrary line, and sample computations are presented.     

Analysis of Arbitrarily Oriented Microstrip Transmission Lines in Arbitrarily Shaped Dielectric Media Over a Finite Ground Plane

A numerical analysis is presented for a multiconductor transmission line in multilayered Iossy, dielectric regions where the ground plane is of finite extent. The transmission fines are infinitely long and vary in cross section from finite to infinitesimally thin. The Green's function for such a two-dimensional transmission line involves an arbitrary constant. If the ground plane is infinite, the method of images could be used where this constant cancels out. However, in the case of a finite ground plane, the constant has to be evaluated. Here a numerical method is presented where the constant could be eliminated rather than evaluated by imposing the condition for the total charge to be zero. The transmission lines, dielectric regions, and the ground plane can have arbitrary cross sections.     

Coupled-mode formulation of multilayered and multiconductortransmission lines

A novel coupled-mode formulation for multilayered and multiconductor transmission lines is developed. In this formulation, the solutions to the original multiconductor system are approximated by a linear combination of eigenmode solutions associated with the isolated single conductor line located in an appropriate reference dielectric medium. The reciprocity theorem is used to derive the coupled-mode equations. The coupling coefficients are expressed in terms of the simple overlap integrals between the eigenmode fields and currents of the individual conductor lines. As a basic application, the dispersion characteristics of two identical coupled-microstrip lines are analyzed using the proposed coupled-mode theory. It is shown that the results are in very close agreement with those obtained by the direct Galerkin's moment method over a broad range of weak to strong coupling     

Multiconductor Transmission Lines In Multilayered Dielectric Media

A method for computing the capacitance matrix and inductance matrix for a multiconductor transmission line in a multilayered dielectric region is presented. The number of conductors and the number of dielectric layers are arbitrary. Some of the conductors may be of finite cross section and others may be infinitesimally thin. The conductors are either above a single ground plane or between two parallel ground planes. The formulation is obtained by rising a free-space Green's function in conjunction with total charge on the conductor-to-dielectric interfaces and polarization charge on the dielectric-to-dielectric interfaces. The solution is effected by the method of moments using pulses for expansion and point matching for testing. Computed results are given for some cases where all conducting lines are of finite cross section and other cases where they are infinitesimally thin.     

分析多层介质多导体传输线的区域分解法

本文利用区域分解法 ,将直线法和有限差分法结合起来 ,用于计算多层介质中具有任意截面形状多导体传输线的电容和电感矩阵。通过在纯介质区域使用直线法 ,导体所在区域使用有限差分法分别进行求解 ,充分发挥两种方法各自的优越性。直线法中快速傅里叶变换的引入进一步提高了算法的计算效率。数值结果表明 :该方法是有效的 ,且计算时间与介质层的厚度无关。文中还研究了介质层分界面的不平整性对传输线电磁参数的影响。     

A configuration-oriented SPICE model for multiconductortransmission lines with homogeneous dielectrics

Using the SPICE circuit analysis computer program to simulate a lossless multiconductor transmission line is investigated. It is demonstrated that for the case of a homogeneous dielectric, the multiconductor line can be represented by a system of standard two-wire lines which is not based on modal decomposition. This system is readily modeled with SPICE. While restricted to situations where the dielectric constant can be assumed uniform, the present method has the advantage of an intuitive relationship to the conductor configuration, simpler SPICE input data requirements, and an improvement in computer run time over other methods     

Physically consistent transmission line models for high-speed interconnects in lossy dielectrics

The development of a physically consistent multiconductor transmission line model for high-speed interconnects in lossy, dispersive dielectrics is presented. Based on this model, a methodology is presented which constructs SPICE-compatible equivalent circuits that take into account dielectric loss and dispersion. Simulations using wideband measurement data of alumina demonstrate the effect of the Debye based permittivity model.     

多芯片组件带网孔接地板多导体互连线结构的电磁特性分析

本文给出一基于准静态场的直线法,来分析多芯片组件（ＭＣＭ）带有网孔接地板的多层多导体互连线结构的分析方法,以此提取等效传输线的特性参数。最后给出几个实例的计算结果。     

Hybrid-mode analysis of multilayered and multiconductortransmission lines

Hybrid-mode propagation properties of multilayered and multiconductor transmission lines are studied by using an efficient vector finite element method (FEM) with high-order hybrid edge/nodal triangular elements, which can give frequency-dependent propagation constants directly. Characteristic impedances are also calculated from the FEM field solutions employing a reciprocity-related definition and taking the modal orthogonality into account. The numerical results of a coupled microstrip line are compared with those of the boundary integral equation technique, and good agreement is obtained. Also, a dual-plane triple microstrip line is analyzed. The approach is found to be very general and able to simultaneously handle different thicknesses and widths of strip conductors. The flexibility of the approach is also shown by including anisotropy in the dielectric substrates of such lines