【摘要】 主要对不同吸波机理扩展超材料微波吸收体衰减吸收频带的研究现状进行了综述,包括基于谐振吸收、加载集总元件、加载电阻材料的频带扩展方法以及通过可调超材料实现超材料吸波体的智能化吸收和宽频吸收的方法,重点讨论了分形学曲线在超材料设计中的应用,分析了其能通过小的尺寸实现低频谐振吸收的优点以及分形学图案自带的频带扩展能力,提出了分形学曲线和图案是未来超材料吸波体发展的一个重要途径。更多还原

【Abstract】 The development process of metamaterial used as radar absorber and its current research situation were reviewed.Especially,the different ways of extending radar absorbing bandwidth of metamaterials were discussed on the basis of different absorbing mechanism,which included resonance absorption,loading lumped components and loading resistance materials.The adjustable metamaterial was also an option to achieve intelligent absorption and broadband absorption.The fractal curve and fractal pattern in metamaterials absorber design which can resonate at low frequency in small size footprint were discussed,at the same time the fractal pattern’s band expansion capabilities was an upmost important merit to gain wider bandwidth.According to those advantages,the fractal curve and the fractal pattern design is concerned as prospected structures to achieve perfect wideband absorption in the future.更多还原