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本文给出一种计算多层介质中多导体拐角互连结构的准静态电容参数的快速算法─—维数缩减技术(DRT),并和有限差分法相结合,快速、准确地提取了多层介质中多导体拐角结构的准静态电容矩阵。由于维数缩减技术能充分利用集成电路结构分层的特点,从而大大减少了计算所需的时间和存储空间。文中给出的计算结果与Ansoft软件的计算结果吻合得较好,而计算所需的时间和存储空间大大少于Ansoft软件。 相似文献
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针对求取区域目标的世界坐标的需要。以Harris角点算法对摄像机图像进行分析,提取图像中目标区域的角点。通过使用VC++环境中的OpenCV进行编程运算,计算出摄像机标定参数并运用双目视觉法计算出目标位置的世界坐标。 相似文献
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本文提出采用Pade逼近的介质格林函数方法计算多导体互连线分布参数。由于采用了分层介质的格林函数,只需在导体表面进行剖分,大大降低了未知变量的规模,本文首先提出利用Pade逼近对Laplace方程的级数形式的格林函数进行收敛性加速。文中给出了加速收敛的结果,表明这种方法是很有效的。 相似文献
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利用电磁场积分方程的伽略金法求解理想导体电磁散射问题时需要计算奇异性的二重面积分(即4维积分).伽略金法的基函数和检验函数广泛采用RWG(Rao-Wilton-Glisson)矢量基函数.传统上采用奇异值提取技术和Duffy坐标变换法处理该奇异性积分,本文提出了一种更为精确和高效的计算方法,该新方法通过参数坐标变换、相对坐标变换、积分区域分解和广义Duffy坐标变换相结合的技术消除了被积函数的奇异性并降低了原4维奇异性积分的数值积分维数.通过计算实例证明该方法的精确性和高收敛特性. 相似文献
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区域分裂法在提取多层介质中多导体三维复杂互连结构电磁参数中的应用 总被引:1,自引:0,他引:1
本文首次将区域分裂法(DDM)用于多层介质中多导体三维复杂互连结构的电磁参数的提取,可以快速、准确地提取复杂互连结构的静态电容矩阵。由于区域分裂法能肥大问题化为若干独立的小问题,不仅可以缩小计算规划,而且可以在该算法框架下灵活地组合各种三维互连结构,具有很强的灵活性,再充分利用集成电路结构分层的特点,对各个小问题采用最恰当的计算方法,从而可大大减少整体设计所需的时间和存储空间。文中给出的计算结果A 相似文献
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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 总被引:2,自引:0,他引:2
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. 相似文献
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本文提出了分析计算内导体偏置的矩形屏蔽带状线电容的部分模拟电荷法。电容计算值和实验结果吻合较好。此方法可通过增大级数项数来提高计算精度。 相似文献
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《Microwave Theory and Techniques》1967,15(10):575-582
The cross sections of most TEM mode transmission lines have reentrant corners or edges where the potential gradient is singular. In this paper the accuracy of the finite-difference solution for the electric field normal to the conductor boundary at a right-angle corner and at the edge of a thin plate is examined. The accuracy of the finite-difference solution is related to the mesh length h, the magnitude of the lattice point residuals, and the finite-difference operator which is used in place of the Laplacian differential operator. The computing time required to solve the mesh equations by the method of successive overrelaxation is specified. The surface charge density in the neighborhood of the boundary singuIarity is expressed as a truncated series of circuIar harmonics. As a result, the integral of the surface charge can be calculated with very good accuracy. The paper concludes by using the harmonic series treatment to determine the capacitance per unit length of a square coaxial transmission line. 相似文献
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马西奎 《电子科学学刊(英文版)》1990,7(3):223-231
The partial charge simulation method is presented to solve the characteristicimpedance of the transmission line of specific cross section with an offset inner conductor.Thismethod has a higher accuracy due to the accurate satisfaction of the boundary condition on theouter conductor.The combined method of the Gauss elimination and optimization is used tosolve the equation of charge simulation,and it is an effective method for increasing the accuracyand assuring the convergence.The Green's functions of five transmission lines(i.e,with circular,elliptic,rectangular,trough and slab conductor)are given. 相似文献
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《Microwave Theory and Techniques》1983,31(5):403-406
This paper describes the analysis of a transmission line having an oval-shaped center conductor syrnmetrically placed inside an outer conductor in the form of a rectangular waveguide. A conformal transformation is used to calculate the characteristic impedances of oval, elliptic, circular, and planar conductors. The impedance data of these structures are presented in the form of charts for different aspect ratios of the rectangular outer condnctor. The charge distribution on the center conductor is also determined. 相似文献
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Gai Bingzheng 《电子科学学刊(英文版)》1987,4(2):88-95
In this paper, the two dimentional problems of the diffraction of the electromagnetic waves by a perfect conductor are discussed
by using the perturbational mapping function in Savin’s form. The general method and asymptotic formulas to solve this problem
are presented. Especially, for the asymptotic solutions based on a circular cylindrical conductor, the formulas to calculate
“O”—order and “I”—order asymptotic solution are given 相似文献
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《Microwave Theory and Techniques》1972,20(2):178-180
Expressions are derived for computing loss in coupled TEM structures in terms of complex even- and odd-mode propagation constants and characteristic impedances of the lines. The attenuation due to conductor (series) and dielectric (shunt) losses in a given structure can be determined utilizing these expressions. The results may be particularly useful for computing conductor loss in microwave circuits with a large number of sections used in traveling-wave devices and as microwave circuit elements. The method is applied to some typical structures for computing conductor loss. 相似文献
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Jean-Fu Kiang 《Microwave Theory and Techniques》1996,44(9):1586-1589
In this paper, we study the normalized wavelength and attenuation constant of coplanar waveguides with a finite metal thickness. The substrate is a lossy inhomogeneous insulator-semiconductor, and the conductor is assumed perfect. Electroquasi-static approximation is used to derive a Laplace's equation with a complex permittivity in each inhomogeneous layer, from which the eigenmodes are obtained. Proper boundary conditions between contiguous layers are applied to calculate the charge distribution on the center conductor. The effects of the insulator depth and semiconductor conductivity on the normalized wavelength and attenuation constant are analyzed 相似文献
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The one well-known one-dimensional method for calculating the AC resistance of multilayer transformer windings contains a built-in orthogonality which has not been reported previously. Orthogonality between skin effect and proximity effect makes a more generalized approach for the analytical solution of AC resistance in windings possible. This includes a method to calculate the AC resistance of round conductor windings which is not only convenient to use, but gives more accurate answers than the basic one-dimensional method because the exact analytical equations for round conductors can be used 相似文献
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An exact solution for the surface potentials produced by a dipole source surrounded by a stratified prolate (or oblate) volume conductor is given. A transmission matrix approach is used which permits the surface potentials to be calculated using a simple iterative method. The computer implementation of the method is discussed 相似文献
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The Characteristic Impedance of a Family of Rectangular Coaxial Structures with Off-Centered Strip Inner Conductors 总被引:1,自引:0,他引:1
《Microwave Theory and Techniques》1979,27(4):294-298
A two-parameter family of hyperelliptic integrals is exhibited which maps the upper half-phase into the interior of a rectangle pierced by a reentrant line. Since these integrals can be expressed as the sum of elliptic integrals of the first kind, the odd- and even-mode characteristic impedances of a two-parameter family of coaxial structures whose inner conductors are strips, displaced perpendicularly to their width from the center of the outer rectangular conductor, can be expressed in terms of these well-known functions. Numerical values are given for a range of values of W/B and B/sub 1/ /B. Here W is the width of the strip, B is the height of the outer rectangular conductor, and B/sub 1/ is the distance from the strip to the farthest parallel wall of the outer conductor. 相似文献