摘要
针对吸波材料和微波暗室问题,建立了数学模型.为了分析尖劈形状吸波体的性能,建立反射面的镜像,分别使用平面标量几何和空间矢量几何的方法对二维和三维的情形进行分析,并通过数值计算,得出以下结论:尖劈角2α越小,反射波平均辐射强度越小,吸波效果越好;当尖劈角为90度时,吸波效果最差.为了模拟微波暗室的性能,对墙面划分微元,对每个微元的辐射通量建立动态平衡方程组求解,得出相关结论.同时,还通过MATLAB软件的图形用户界面GUI,制作了一个微波暗室吸波材料预测软件.最后,使用更为常见的半波偶极子天线(全向天线)代替余弦辐射体天线进行计算,并得出若干有用结论.
A mathematical model is presented for evaluation of a microwave chamber with wave absorption materials. Analysis of proformanee for pyramid-cone absorbers is proposed using mothod of images and geometry derivation of equation. Numerical results show that proformance of wave-absorbing increased with low angel of pyramid-cone. Conclutions show that the proformance get worst when α≈π/4@Also, simulation of the proformance of a microwave chamber is preseted by dividing the walls and establishing dynamic balance equations that some useful conclusions are presented. Accrodingly, a software calculating the proformance of microwave chamber is programmed using GUI in MATLAB. Moreover, the model is re- calculated with cosine radiator in the chamber replced by half-wave dipole that additional conclution is presentd.
出处
《数学的实践与认识》
CSCD
北大核心
2012年第14期142-149,共8页
Mathematics in Practice and Theory
