Matlab求解方同轴波导的截止波长和特性阻抗

采用有限差分法利用Matlab求解了方同轴波导的特性阻抗和高次模的截止波长并画出了场结构图,将所得数据与国外文献数据进行了对比,证明了有限差分法结合Matlab在分析简单截面的同轴波导时是简单可行的,而且计算精度较高,通用性强,可以用于传输线工程问题的设计和计算.最后计算了矩形同波导和偏心同轴波导的相关数据,用于与方形同轴波导对比.

Analysis of Transmission Character in Square Coaxial Waveguide with Matlab

The paper applies Matlab based on the FDI method to solve the characteristic impedance,cutoff wavelength and gives out the field pattern of high - order modes in square coaxial transmission. Through comparing the data with the equivalent in foreign paper,it is proved that the FDI method with Matlab is a simple and feasible method. It is of high accuracy, common usefulness and can be applied generally for the analysis of transmitsion lines. At last it calculates the related data of rectangular coaxial waveguide,eccentric coaxial waveguide,and compares them with the first.