多屏频率选择表面传输曲线具有优秀的平顶和陡截止的带通滤波特性,特别适用于天线隐身的应用要求。文中首 先设计了一种排列紧凑的通带六边形环单元,基于此单元,利用谱域法,分别进行了3屏和2屏频率选择表面的设计计 算。采用激光刻蚀和中温固化工艺制备了试验件,并进行了传输系数测试,测试值与计算值基本符合,结果表明,所设计 的3屏频率选择表面具有宽带宽角和陡截止的性能,传输性能优于双屏频率选择表面。

Multi-screen frequency selective Surface(FSS) is especially applicable for stealth antenna technology because of its excellent band filter characteristic with a flat top and sharp fall off. A band-pass hexagon loop element with smaller inter-element spacing was designed. Then based on this element , a tri-screen FSS and a double screen FSS have been designed and calculated respectively by using spectral-domain approach. With laser ablation technology and moderate temperature curing techniques, two kind FSS were fabricated. The measured results show that, the tri-screen work well both for wide-band and wide-angle with a sharp fall off outside pass-band,the transmission properties are better than that of double screen FSS.