表面误差对反射面天线电性能的影响  

The Effect of Surface Error on Reflector Antenna Performance

作　　者：宋立伟[1] 段宝岩[1] 郑飞[1] 马洪波[1] 

机构地区：[1]西安电子科技大学机电科技研究所,陕西西安710071

出　　处：《电子学报》2009年第3期552-556,共5页Acta Electronica Sinica

基　　金：国家重点基础研究发展规划(973计划)项目(No.61358)

摘　　要：针对反射面天线存在的误差问题,建立了包含系统误差和随机误差对电性能影响的数学模型.该模型根据表面误差与口径面相位分布的关系,利用口径法得到功率方向图.通过对模型分析可知,随机误差对方向图各个方位产生影响;系统误差产生栅瓣,且栅瓣的位置和电平取决于变形情况.最后将模型应用到8米口径的抛物面天线中,收到了满意的结果,验证了文中模型和方法的正确性.To study the effect of the surface errors on reflector antenna performance, a computational model including systematic distortions and random errors was presented.In the model,power pattern was given by the aperture-field method according to the relation between surface errors and the phasedistribution of aperture plane. Then power patterns were simulated and it is shown that random en-ors work in every azimuth angles and systematic distortions generate grating lobes in a few angles, the location and level of grating lobes depend on the systematic distortions. Finally, the model was applied to a practical antenna with the diameter of 8 meters,the results show that the proposed model is valid.

关 键 词：反射面天线 表面误差 系统误差 随机误差 电性能 

分 类 号：TN823.27[电子电信—信息与通信工程]