超性能阵列一直是研究者们孜孜以求的目标。小间距阵列是实现超性能阵列的一个重要方法，但受限于小尺寸阵元的性能以及阵列效率等问题而难以实现。近年来，惠更斯元天线突破了电小天线的性能限制，在无需反射板的情况下，可以获得高方向性和超高前后比，这为小间距阵列提供了绝佳的阵元选择。本项目提出一种新型的方向图重构惠更斯元天线，它可以进一步帮助提高小间距阵在宽角扫描处的方向性，甚至实现高方向性的全向扫描特性，这将改变当前采用多付相控阵天线扫描全空间的方法。针对超性能阵列的实现问题，本项目将开展基于方向图重构惠更斯元的小间距阵列天线研究。探明方向图重构惠更斯元天线的工作机理和构建方法，解决实现方向图重构惠更斯元天线的关键问题，将其用于小间距阵列的分析和综合，最终获得具有高方向性和全向扫描特性的超性能阵列天线，突破现有阵列天线理论的局限性。

Super-performance arrays are always the attractive aims for researches. Small-space array is a key method to realize super-performance array antenna, but it is hard to achieve because of the performance of the array elements and the array efficiency. In recent years, Huygens source antenna breaks through the performance limits of the electrical small antenna (ESA). Without the reflecting plate, high directivity and super ratio of front to back (F/B) can be acquired by ESA, which provides an excellent choice for small-space array. This project proposes a novel radiation-pattern-reconfigurable (RPR) Huygens source which can improve the directivity of the small-space array further at wide-scanning angle and even realize the full-direction scanning with high directivity. This will change the method of scanning full space with several phased arrays. Aiming at the problems of super-performance array, the project researches the small-space array antenna based on RPR Huygens source. The operating mechanism and constructing method will be explored, and the crucial problems will be solved. The RPR Huygens source will be used in the analysis and synthesis of small-space array. Finally, the super-performance array antenna with high directivity and full-direction scanning will be obtained, and the limitation of the existing array theory will be broken through.