随着新型超宽带通信对天线性能指标的要求越来越高，小型化高性能UWB-MIMO天线研制已成为一个极具挑战性的研究课题。本项目拟针对现有超宽带天线存在的问题，基于脉冲信号辐射理论，深入分析脉冲波形畸变产生机理和制约高性能超宽带天线实现的各种因素，提出新颖超宽带天线的设计思路、方法及要求；进一步结合特征模理论和超宽带天线技术，提出普适高效的超宽带天线特征模计算方法，从而揭示超宽带天线结构与其性能参数之间的内在联系，为UWB-MIMO天线设计奠定理论基础；基于上述理论研究结果，引入新颖带宽展宽、小型化技术和高效去耦方法，研制若干款小型化共面高性能UWB-MIMO天线；在此基础上，进一步引入新颖多陷波特性设计技术，提出若干性能平衡的高性能多陷波UWB-MIMO天线结构，并给出其性能分析及评价。该项目的研究成果可为大规模高性能UWB-MIMO天线阵研制提供参考。

The development of the miniaturized and high performance UWB-MIMO antenna becomes a challenging research topic with the increasing requirements of the antenna performance for new UWB communications. In this project, in order to solve the existing problems of UWB antennas, the mechanism of the pulse waveform distortion and the various factors that restrict the realization of the high performance UWB antenna are studied based on the theory of pulse signal radiation, and the novel design ideas, methods and requirements of UWB antenna are proposed. Combined with the characteristic mode theory and UWB antenna design technology, this application reveals the inherent relationship between the UWB antenna structure and its performance parameters, which lays a theoretical foundation for the design of UWB-MIMO antennas. Based on the theoretical studied results, the novel bandwidth enhancement technology, miniaturization technology and efficient decoupling methods are studied. Several novel miniaturized coplanar high performance UWB-MIMO antennas are designed on this basis. Furthermore, several novel UWB-MIMO antenna structures with multiple band-notched characteristics and trade-off performance are presented by introducing new design technology of the multi-notch bands for the above-mentioned UWB-MIMO antenna structures. In addition, their performances are analyzed and evaluated. The research results of this project can provide references for the development of high performance massive UWB-MIMO antenna arrays.