摘要
利用基于表面电流积分的物理光学法对赋形反射面天线的远场辐射特性进行了建模和分析 ,比较了反射面完好时的计算结果与测试值 ,取得了良好的一致。着重研究了天线反射面多孔毁伤后辐射方向图特性受毁伤孔数、孔径及其位置的影响。分析发现 ,只有当孔径大于一定的尺寸 (约 0 .2 0个波长 )时 ,天线增益和副瓣电平才会发生明显变化。同时 ,毁伤孔径越大。
The far field of the shaped reflector antenna is modeled and analyzed by using the physical optics (PO) method based on the surface current integration. Comparison between the calculated results and the measured ones without the damnification is made, and good agreement is obtained. The concentration is made on the radiation pattern characteristics of the antenna after its reflector is damaged with multiple holes, including the influences on those characteristics by the hole number, sizes and positions. Analysis shows that, only when the size of the hole is larger than 0.2 wavelengths will the variation of the antenna gain and the side-lobe level become obvious. Meanwhile, the lager the size of the damage holes is, and the closer their positions are to the reflector center, the lower gain and the higher side-lobe level of the antenna will have.
出处
《电波科学学报》
EI
CSCD
2003年第6期648-651,共4页
Chinese Journal of Radio Science
