CAJ | 학술논문

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.
위제고미파암실정구반사솔전평재저빈단적방진계산정도,기우혜경사원리화여현복사체적복사통량계산공식,추도정구내모일점적직접복사공솔화래자실내6개면적간접복사공솔공식.재차기출상,득도미파암실정구반사솔전평능량법방진계산모형.최후이용Matlab연건편정,대일개소형수궤천선측시용미파암실정구3개절면상적반사솔전평진행능량법방진계산.결과표명,능량법방진득도적결과상비궤하광학법경부합실제전자파공간련속분포적특점.
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.