【摘要】 利用菲涅尔区相位修正聚焦结构和馈源阵列构成一种新型的多波束自适应天线 .本文深入分析了基于该天线的阵列输出特性 ,与基于均匀线形阵的空间谱估计技术比较的基础上 ,揭示了其良好的去相关性能 .最后应用极大似然估计算法实现了相干信号源在大角度入射的情形下 ,菲涅尔平板天线对来波方向的有效估计 ,从而避免了应用MUSIC算法进行来波方向估计时所遇到的观察区域的限制问题 .仿真计算的结果表明菲涅尔平板天线良好的空间谱估计性能更多还原

【Abstract】 A novel multi beam adaptive antenna is constructed by means of Fresnel zone phasecorrecting focusing configuration and feeding array. The statistical characteristic of feeding array output and the ability for resolving coherent signals of this new adaptive antenna are analyzed by comparison with that of the uniform spaced linear array using spatial smoothing techniques for coherent signal identification. Then, the maximum likelihood function approach is exploited to perform the efficient eatimation in the direction of arrival(DOA) under wide angle multiple coherent signals incident, and to avoid the problems of the inherent field of view coming form MUSIC algorithm for bearing estimations. The result of simulation shown the good spatial spectrum estimation performance of the FZP antenna.更多还原