论文部分内容阅读
从麦克斯韦方程组出发,结合电磁场的边界条件,推导出介质矩形波导导模的一般色散方程。对普通介质矩形波导和左手介质矩形波导的导模场分布分别进行了数值模拟。通过对比两种介质矩形波导的导模场分布的模拟结果,发现左手介质矩形波导Ex22模的场分布比普通介质波导Ex00模的场更集中在波导中部。同时,根据处理普通介质矩形波导的Marcatili方法,类比得到左手介质矩形波导表面模的色散方程,并数值模拟了低阶模的场分布,结果表明,能量主要集中在波导的四个角区以及波导的边缘。
Starting from the Maxwell equations and combining with the boundary conditions of the electromagnetic field, the general dispersion equation of the waveguide rectangular waveguide is deduced. The numerical simulation of the guided mode field distribution of ordinary rectangular waveguide and left-handed rectangular waveguide was carried out respectively. By comparing the simulation results of the guided mode field distributions of the two rectangular waveguides, it is found that the field distribution of the left hand medium rectangular waveguide Ex22 mode is more concentrated than that of the ordinary medium waveguide Ex00 mode in the middle of the waveguide. At the same time, according to the Marcatili method which deals with ordinary rectangular waveguides, the dispersion equations of left-handed rectangular waveguides are analogically simulated and the field distributions of the lower-order modes are numerically simulated. The results show that the energy is mainly concentrated in the four corners of the waveguide and the waveguides the edge of.