【摘要】 应用时域有限差分法(FDTD)计算圆形槽波导中径向盘结构的输入阻抗。用了一种简单方法近似圆形槽波导的曲线金属边界。完全匹配层(PML)应用于圆形槽波导的开放边界。细网格计算所以关注的径向盘中的场值。用离散波动方程更新粗细网格边界上的切向电场分量。最后,由电压和电流的傅立叶变换的比值得到随径向盘位置变化的输入阻抗。更多还原

【Abstract】 Finite-difference time-domain (FDTD) method was used to calculate the driving-point impedance of radial disk in circular groove guide. The technique included an approximate curvilinear metal boundary,a perfectly matched layer (PML) setting for the open boundary, a fine-grid method to calculate the field’s value in the radial disk to be interest. Discrete wave equation updated the tangential electric field value on the boundary of coarse and fine grid. The driving-point impedances related to different position of the radial disk were achieved from the ratio of the Fourier transform of the voltage and the current.更多还原