论文部分内容阅读
用时域有限差分方法 ( FDTD)对谐振腔内 TM0 1 1谐振模式进行了电磁场的数值模拟 ,研究谐振腔壁面开槽对电磁场分布的影响。首先对完整 (不开槽 )谐振腔进行分析计算 ,与解析解进行了比较 ,说明该计算方法正确。然后对腔内壁面开有沟槽的情况进行了数值计算。结果说明 :沟槽位于谐振腔中间时 ,开槽及其尺寸对电磁场的对称性没有影响 ,但对电磁场的大小有影响。沟槽所处的位置 ,对电磁场的对称性影响较大 :沟槽位于谐振腔后端时 ,电磁场的最大值区出现在前部 ;沟槽位于谐振腔前端时 ,电磁场的最大值区出现在后部。这些结论可以为谐振腔的设计提供理论依据。
The finite-difference time-domain method (FDTD) was used to simulate the TM0 1 1 resonant mode in the resonant cavity and study the influence of cavity slot on the electromagnetic field distribution. First of all, the intact (not slotted) cavity is analyzed and calculated, and the analytical solution is compared, which shows that the calculation method is correct. Then, the situation that the inner wall of the cavity has a groove is numerically calculated. The results show that when the trench is located in the middle of the resonator, the slot and its size have no effect on the symmetry of the electromagnetic field, but have an impact on the size of the electromagnetic field. The location of the groove has a great influence on the symmetry of the electromagnetic field. When the groove is located at the rear end of the resonator, the maximum value of the electromagnetic field appears in the front. When the groove is located at the front of the resonator, the maximum value of the electromagnetic field appears rear. These conclusions can provide theoretical basis for the design of resonant cavity.