频率选择表面(FSS)是谐振单元周期排布而成的人工电磁结构,其在频域上可实现带通或带阻功能。在宽频带通FSS 设计中,通带内插损特性和带宽特性往往相互制约,存在严重的矛盾,这是亟待解决的技术难题。针对此问题,文中提出一种基于FP 谐振机理的新型FSS 设计。该设计在典型带通FSS 结构基础上,通过三维微元层,引入FP 共振模式。通过选择合适的微元尺寸,推迟微元层谐振频率,在不影响原有带通谐振机理的基础上,提高调制场相位的能力,达到拓展透波带宽的目的。文中对三维微元加载FSS 新设计进行的特性仿真分析,验证了该结构的可行性和有效性。

The frequency selective surface (FSS) is generally composed of two-dimensional periodic planar resonant elements. FSS can achieve band-pass or band-stop characteristics in the frequency domain. However, in designing the broadband band-pass FSS, wave insertion loss performance in pass band and bandwidth characteristics tend to conflict to each other, which is an urgent technical problems. In this paper, a new FSS structure based on the FP resonant mode is proposed. By introducing the three-dimensional micro-element layer for the FP resonance, and further reducing the physical size of the micro-element for delaying the resonant frequency, the bandwidth performance of the FSS is significantly improved without introducing notable insertion loss in the pass band. In this paper, the design of a three-dimensional micro-element loading FSS prototype is discussed with further characteristic analysis by simulation studies, and the feasibility and stability of the new design is verified by those results.

TN959