Bandstopfilter made with this structure has narrow gap and steep attenuation.
利用该结构制作的带阻滤波器，阻带窄、衰减陡峭。
2
Meanwhile, this method can be extended to the design of band-stopfilter.
同时，该方法可以推广至带阻滤波器的设计。
3
A frequency selective surface (FSS) is a metallic periodic structure with frequency selective properties. Depending upon design, it may be low-pass, high-pass, band-pass, band-stopfilter.