基于多层全金属结构的宽带高效率平板阵列天线技术研究

Modern radar and communication systems (especially for the aviation and aerospace platforms) must acquire the performances such as high transmitting data rate information, high resolution and miniaturization. Therefore, the corresponding development requires that antennas must exhibit the characteristics such as wide bandwidth, high efficiency and low profile. As the present planar array antennas have narrow bandwidth or low efficiency problems, this proposal will conduct researches on wideband, high efficiency and low profile planar array antennas, which will be based on multi-layer and full-metal structure. The researches mainly include: 1) The research on mechanism analysis and integrated design of widening the cavity resonant bandwidth by adding stubs in it and producing multi-resonance; 2) The research on the design method of improving the aperture efficiency by changing the shape of the radiation aperture and exploring the rule of aperture field distribution uniformity. 3) The design of the novel high efficiency and miniaturization transmission line by loading support structure onto air-filled microstrip line and the research on its transmission properties; 4) The research on techniques for relative feeding methods and networks based on the novel transmission line. It’s expected that the related theories and models will be built, breakthroughs in the aforementioned research and investigations will be made and the integrated design methods for wideband and high efficiency planar array antenna will be obtained, which will be verified through experiments. The completion of this project will be significant for future wireless systems that require wider bandwidth coverage and miniaturisation.

现代雷达和通信系统（尤其用于航空航天平台）大通信容量，高分辨率和小型化的发展趋势对天线提出了宽带宽、高效率和低剖面的要求。针对现有平板阵列天线或带宽窄或效率低的问题，本项目拟基于多层全金属结构对宽带高效率低剖面平板阵列天线进行研究，主要包括：1）通过在腔体内加入枝节，寄生多种谐振，进而展宽谐振带宽的机理分析和综合设计研究；2）改变天线辐射口面形状，探索辐射口径场分布一致性的规律，进行提高口径效率的设计方法研究；3）基于悬空微带线加入支撑结构，设计高效率和小型化的新型传输线，并对其传输特性进行研究；4）基于新型传输线，研究相关馈电形式和馈电网络技术。该研究预期将建立相关理论模型，突破上述关键技术，获得宽带高效率平板阵列天线的综合设计方法，并进行试验验证。项目的完成将在促进无线系统宽带覆盖和小型化方面具有重要意义。

现代雷达和通信系统（尤其用于航空航天平台）大通信容量，高分辨率和小型化的发展趋势对天线提出了宽带宽、高效率和低剖面的要求。针对现有平板阵列天线或带宽窄或效率低的问题，本项目基于多层全金属结构对宽带高效率低剖面平板阵列天线进行了研究，主要包括：1）通过在腔体内加入枝节，寄生多种谐振，进而展宽谐振带宽的机理分析和综合设计研究；2）改变天线辐射口面形状，探索辐射口径场分布一致性的规律，进行提高口径效率的设计方法研究；3）基于悬空微带线加入支撑结构，设计高效率和小型化的新型传输线，并对其传输特性进行研究；4）基于模式分析和天线赋形，研究了多种宽带天线，多波束网络和天线赋形方法。该研究建立了相关理论模型，突破了上述关键技术，获得宽带高效率平板阵列天线的综合设计方法，并进行了试验验证。项目的成果在促进无线系统宽带覆盖和小型化方面具有重要意义，部分成果实现了项目应用。