论文部分内容阅读
在近代的微波技术问题中,计算截面形状复杂的传输线及各种特殊形状的谐振腔的一些电磁参数,有许多近似方法,如微扰法,张弛法,变分法等。但用这些近似方法往往不能得到满意的精确程度。本文介绍用有限元法解微波技术问题,能得到比其他近似方法更为精确的解。一、基本原理解决各种不同形状截面的传输线问题,要得到传播常数及截面上电磁场强度的函数表示式是非常困难的,甚至是不可能的。而用有限元法来求解,就可求得比较精确的解。图1表示各种不同形状的传输线截面。首先将这截面划分为许多三角形元,或划分为四
In modern microwave technology, there are many approximate methods such as perturbation method, relaxation method and variational method to calculate some electromagnetic parameters of transmission line with complex cross-section and resonators of various special shapes. However, these approximations can not always be satisfactorily accurate. This article describes the use of finite element method microwave technology, can get more accurate than other approximate solutions. First, the basic principles To solve a variety of cross-section of the transmission line problems, to get the propagation constant and the cross-section of the electromagnetic field strength function expression is very difficult, or even impossible. Finite element method to solve, you can find a more accurate solution. Figure 1 shows the transmission line cross sections of various shapes. This section is first divided into many triangles, or divided into four