表面误差对反射面天线电性能的影响.pdf

3 Vol. 37 No. 3 2009 3 ACTA ELECTRONICA SINICA Mar. 2009 宋立伟, 段宝岩, 郑 飞, 马洪波 ( , 710071) : , . , . , ; , . 8 , , . : ; ; ; ; : TN82327 : A : (2009) The Effect of Surface Error on Reflector Antenna Performance SONG Liwei, DUAN Baoyan, HENG Fei,MA Hongbo ( Research Institute on M echatronics , X idian University, X i an , Shaanx i 710071, Chi na ) Abstract : To study the effect of the surface errors on reflector antenna performance, a computational model including sys tematic distortions andrandom errors waspresented.In the model, power pattern was given by the aperturefield method according to the relation between surface errors and the phase distribution of aperture plane. Then power patterns were simulated and it is shown that random errors 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 wasapplied to a practical antenna with the diameter of 8 meters,the results show that the proposed model is valid. Key words: reflector antenna; surface errors; systematic distortions;random errors;performance ( ) 1 , . , , , . , , . Bahadori K[4] , , . . Bahadori K , , . . , , ( . , ) . , , . . , , , , ; [ 1] . Ruze . [2] , Vu , , [3] . Rahmatsamii