Multimode method for low sidelobe array pattern synthesis
This paper is aimed at the practical application requirements of low sidelobe array antenna,using the idea of space-time coding to design weighting vector,sequential fast Fourier transform(FFT)method,constraint equation calculation method and optimization function solution method are proposed respectively,corresponding to three different working modes of multi-pulse low sidelobe pattern synthesis,the weighting vector is time-varying,invariant and even odd alternating.Theoretical analysis and simulation experiments show that both sequential FFT and constraint equation calculation methods can realize ultra-low sidelobe pattern(better than-50 dB).The optimization function solution method can achieve low sidelobe while still maintaining the good performance of the mainlobe of the pattern,avoiding the shortcoming that the traditional method cannot take into account the performance of the mainlobe and sidelobe at the same time.In addition,the advantages and disadvantages of different methods are comprehensively analyzed from the aspects of computational complexity,random amplitude and phase error,interference suppression,etc.It can provide theoretical guidance and technical reference for the engineering application of practical array antennas.
万方数据
维普
