Research On The Effects Of Feeding Error On The Capability Of Phased Arrays

Due to the effect of feeding error on antenna's radiation performances, which causes the degradation of the sidelobe level , the pointing accuracy and the anti-jamming capability of phased arrays. Feeding error comprizes phase quantization error produced by digital phase shifter, array tolerance and the error produced by failure element. The thesis is focused on the influence of phase quantization error on phased arrays, utilizes probability statistic to analyze its statistical characteristic which relies on the fact that the phase quantization error is random distribution, researches on the effect of the pointing accuracy and sidelobe level on phased arrays aroused by the different distribution of phase quantization error, and confirmes it by computer simulation,at last discusses how the array tolerance and failure element influences the capability of antenna.