Ultra-Wideband Miniaturized Reconfigurable FSS Design with High Selectivity

In this paper, a kind of band-pass frequency selective surface(FSS) with improved out-of-band rejection is proposed by using interdigital capacitor cascade structure. The proposed band-pass reconfigurable FSS can be used for hybrid radome, and its filtering characteristics of “high transmittance in band and strong stealth out of band” will improve the communication performance of the antenna system. the simulation results show that the FSS in 2-2.5GHz transmittance is greater than 70%, X band suppression characteristic is greater than 10dB, reconstruction, Ku band and below, the suppression characteristic is greater than 10dB, realize in TE and TE wide Angle polarization wave incidence, low frequency passband and resistance band can be switchable at the same time, with high frequency ultra-wideband harmonic suppression effect.