直线阵频带内的辐射和散射特性分析  

Analysis of Radiation and Scattering Characteristics of Linear Array in the Operating Band

作　　者：凌劲[1] 龚书喜[1] 张帅[1] 路宝[1] 王兴[1] 

机构地区：[1]西安电子科技大学天线与微波技术重点实验室,西安710071

出　　处：《宇航学报》2011年第2期428-432,共5页Journal of Astronautics

基　　金：国家自然科学基金(60801042)

摘　　要：为降低阵列天线工作频带内的峰值副瓣电平(PSLL)和雷达散射截面(RCS),提出利用混合优化算法IGA-EDSPSO,通过调整阵元间距优化辐射阵因子和散射阵因子,使其带内的辐射和散射特性得到改善。并采用渐近波形估计技术(AWE)结合矩量法(MoM)计算了线阵频带内的PSLL和RCS,考虑互耦后的结果更接近实际情况。与均匀直线阵相比,非均匀阵的PSLL在-17dB以下,RCS在绝大部分频点得到了很好地减缩,证明了此方法的有效性。To reduce the peak sidelobe level（PSLL） and the radar cross section（RCS） of array antennas in the operating band,an IGA-EDSPSO hybrid optimization algorithm is proposed to improve radiation and scattering characteristics by optimizing array radiation factor and array scattering factor.The PSLL and RCS in operating band are calculated by the method of moment（MoM） combined with the asymptotic waveform evaluation（AWE） technique.The results are closer to reality.Compared with the equally spaced array,PSLL of unequal array in the operating band are all less than-17 dB and RCS is greatly reduced in majority of frequencies.Numerical results show that the proposed method is available.

关 键 词：混合优化算法 矩量法 副瓣抑制 雷达散射截面 

分 类 号：TN82[电子电信—信息与通信工程]