摘要
为提高微波暗室静区反射率电平在低频段的仿真计算精度,基于惠更斯原理和余弦辐射体的辐射通量计算公式,推导静区内某一点的直接辐射功率和来自室内6个面的间接辐射功率公式。在此基础上,得到微波暗室静区反射率电平能量法仿真计算模型。最后利用Matlab软件编程,对一个小型手机天线测试用微波暗室静区3个截面上的反射率电平进行能量法仿真计算。结果表明,能量法仿真得到的结果相比几何光学法更符合实际电磁波空间连续分布的特点。
In order to improve the precision of simulation for the microwave anechoic chamber＇ s reflectivity level at low fre- quency, the formula of direct radiation power of a certain point in quiet zone and that of indirect radiation power coming from a point of six indoor surfaces of the quiet zone are deduced according to Huygens principle and the formula of radiation flux for cosine radia- tor. And then, the energy method based calculation model of reflectivity level of the microwave anechoic chamber＇s quiet zone is ob- tained. Finally, the software Matlab is used to program and simulate the reflectivity levels of three sections of a microwave anechoic chamber＇ s quiet zone, in which the antenna of mobile phones is tested. Comparing the results of geometrical optics method and those of simulation using the energy method, the latter is closer to the characteristic of continuous distribution of the electromagnetic wave traveling in the space than the former.
出处
《后勤工程学院学报》
2013年第1期92-96,共5页
Journal of Logistical Engineering University
关键词
能量法
静区
反射率电平
余弦辐射体
energy method
quiet zone
reflectivity level
cosine radiator
