超材料全平面多波束扫描天线阵理论和设计方法研究

Two dimenmsional multi-beam full plane scanning antenna systems based on the novel metamaterial structures are fully studied in this project, which includs both the leaky-wave frequency scanning antenna system and the fixed frequency scanning antenna systems.In the project,the dispersion and transmission properties of the two dimensional metamaterial structures will be firstly studied in theory, then the leaky-wave freqency scanning mechanism is developed and used for scanning antenna designs. Meanwhile, the novel leaky-wave antennas with tunable radiation aperture are studied theoritically for high performance scanning antenna applications. Based on this novel antenna, active controllable dispersion network will be developed for fixed frequency scanning. At last, novel compact beam forming networks are studied to form two dimensional fixed frequency scanning. Based on this project, it is expected to develop much samller, lighter, conformal,and high gain two dimentional multibeam full plane scanning antenna systems, and contributes a lot to the research area of the two dimensional metamaterial full plane scanning antenna systems, which is still a blank area in China.

系统开展基于超材料结构的新型二维多波束全平面扫描天线理论和设计方法研究，包括基于超材料结构的二维频率扫描天线和二维固定频率扫描天线。利用超材料结构能同时支持左手波和右手波的独特性质，首先对二维超材料的色散结构以及传输结构进行理论分析和建模，然后对漏波频率扫描理论特性进行研究，开发出小型化的二维全平面频率扫描天线系统。为了降低波束的副瓣特性，提高扫描性能，提出一种新型辐射口径可调的超材料漏波天线，并对其色散网络进行理论建模，得到其有源的色散控制网络，结合新型的无源波束合成网络，得到性能优良的二维固定频率扫描天线。通过该项目研究，能够开发出基于超材料结构的小型化，轻型化、共型化、高增益的多波束二维全平面固定频率扫描以及变化频率扫描天线系统，弥补我国对于超材料结构在二维多波束扫描天线应用领域的研究空白。

本项目系统地开展基于超材料结构的新型二维多波束全平面扫描天线理论和设计方法研究，这其中包括基于超材料结构的二维频率扫描天线和二维固定频率扫描天线的理论和设计方法研究。利用超材料结构能同时支持左手波和右手波的独特性质，本项目将首先对二维超材料的色散结构以及传输结构进行理论建模，基于这些理论模型研究其漏波频率扫描理论特性，并开发出小型化的二维全平面频率扫描天线系统。为了降低波束的副瓣特性，提高扫描性能，本项目提出一种新型辐射口径可调的超材料漏波天线，并对其色散网络进行理论建模，得到其有源的色散控制网络，然后结合新型的无源波束合成网络，得到性能优良的二维固定频率扫描天线。通过系统而深入的研究，本项目能够开发出基于超材料结构的小型化，轻型化、共型化、高增益的多波束二维全平面固定频率扫描以及变化频率扫描天线系统，弥补我国对于超材料结构在二维多波束扫描天线应用领域的研究空白。