【摘要】 用有限差分法对漏泄同轴电缆的电容进行了计算。文中首先从 L aplace方程出发导出了漏缆横截面内电位的差分方程 ,给出了径向各分界面处的边界条件并进行了离散化 ,得到了电容和特性阻抗的计算式。然后对该方法的计算精度以及人为设置的外边界对计算结果的影响进行了讨论 ,给出了电容收敛曲线。最后对漏缆缝隙角度对电容值以及特性阻抗的影响情况进行了研究更多还原

【Abstract】 The capacitance of Leaky Coaxial Cable (LCX) is calculated by Finite Difference Method in this paper. The difference equation of electrical potential in the cross section of the LCX is derived from Laplace equation. The boundary conditions between interfaces in the radius direction and their discrete forms are given. The expressions for capacitance and characteristic impedance are then obtained. Then, the accuracy of this method and the influence of the outer boundary on the results are discussed. The convergent curve of the capacitance is given. Finally, the influence of slot angle on the capacitance and the characteristic impedance of the LCX is analyzed.更多还原