A Novel Miniaturized Frequency Selective Surface of High Stability

A novel element for band-stop miniaturized frequency selective surface is presented.In this element the area in the rectangle ring is split into four symmetry parts,and in each part by adding up triangle-based spiral elements the resonant length of the element is lengthened,which contributes to miniaturization of unit cell's dimension.Both simulation and experiments are carried out.Both results demonstrate that the length of the unit cell of the proposed FSS is only about 10% of the corresponding wavelength,and the miniaturization performances are of excellent stability with respect to waves of different polarizations and incident angles,which ensures the FSS's practicability in limit space.