降雨衰减对机箱侧缝微波耦合影响研究

Analysis on Influence of Rain Attenuation for Microwave Coupling into Case Slots

为研究高能微波(HPM)传播降雨衰减问题,运用均匀随机概率排列雨滴建立一种新型简单的3维时域有限差分(FDTD)模型,并通过耦合小型机箱侧缝进行仿真计算。结果表明,模型能够实时有效反映雨降在HPM耦合过程中的影响规律,降雨能抑制耦合过程中的频谱分离,能量衰减随降雨区域在传播方向上增大而增加。

In order to study rain attenuation of high power microwave(HPM) propagation,this paper uses uniform random arrangement of rain drops to build a new simple model of three dimension finite-difference time-domain(FDTD) when calculating HPM coupling into small case slots emulationally.The results show that the model can indicate the influence of rain attenuation for microwave coupling.The rain could restrain the spectrum separation and the attenuation increases along with the extendability of the range of rain on the propagation direction.