Transmission–absorption integrated structure via dispersion engineering of spoof surface plasmon polariton and frequency-selective surface

As the traditional frequency-selective surface (FSS) cannot meet the current needs of stealth, in the eletromagnetic environment today the design of multifunctional FSSs is particularly important. Considering this, in this paper we design a kind of transmission and absorption integrated structure based on the dispersion engineering of the spoof surface plasmon polariton (SSPP) and high-order FSS. It can achieve high-efficiency transmission in the band of 9.8–11.4 GHz and absorption in the band of 14.0–18.0 GHz for both x- and y -polarized waves. The effective angle range is 0° to 60°. Compared with classical planar design, it possesses excellent mechanical properties. The transmission and absorption integrated structure is also fabricated and measured to prove the feasibility of the idea. Due to its thin thickness and character, it can be used in radar cross-section reduction aspects. More importantly, through the shape design of the radome, it can achieve scattering in a lower frequency band.