基于人工材料的新型低剖面可重构扫描天线关键技术研究

为适应未来无线系统（包括无线通信系统和雷达系统）泛在化，多功能化和自适应环境性的要求，迫切需要低成本低剖面的具有可重构（reconfigurable）能力的波束扫描天线。本申请课题拟采用在矩形波导漏波天线中引入可重构人工材料反射面技术，预期实现天线可重构和波束扫描两大关键特性需求。本申请课题拟解决两个关键问题，一是如何运用集成在矩形波导窄壁上的可电调反射表面进行波导传输色散特性调控，以及对于漏波天线辐射特性的调控。二是如何实现复合左右手传输特性的平衡性动态可调，以实现漏波天线在较宽频率范围内实现覆盖前后向的全平面波束扫描。本课题将建立可调控反射表面调控参数与漏波天线辐射特性的依赖关系，实现天线定频率波束扫描，工作频率动态调控等功能。本申请课题的研究，既为未来无线系统的多功能化和自适应化准备了关键技术，也将拓展可重构人工材料反射面技术的应用并丰富其设计方法。

With the ever growing interests in the development of pervasive, multi-functional and self-adaptive wireless systems in the future, there emerges an urgent demand for developing low cost, low profile, reconfigurable beam scanning antennas. The proposed project plans to introduce the configurable metamaterial reflective surface into the rectangular waveguide leaky wave antenna techniques, such that two critical demands, namely the reconfigurability and the beam scanning capability, can be achieved. There are two critical problems need to be addressed: Firstly, how to control the rectangular waveguide propagation dispersion properties and ultimately the leaky wave antenna radiation properties by using a reconfigurable reflective metamaterial surface integrated in the waveguide; secondly, how to restore the balance of the composite left/right handed waveguide such that the backward to forward scanning can be obtained in a wide frequency range. The proposed project aims to build up a relating map between the tuning parameters of the reflective metamaterial surface and the radiation characteristics, and ultimately to realize fixed frequency beam scanning, working frequency reconfigurable and beam width reconfiguration. With the effort of this proposed project, it will not only provide the enabling techniques for the future multi-functional and self-adaptive wireless system, but also enrich the application of metamaterial surface and its design methodology.