Dual-band Wide Transmission Band FSS with Large Band Ratio and Deep Spurious-Suppression Characteristic

In this paper, a novel miniaturized low profile dual band polarization insensitive frequency selective surfaces (FSSs) with large band ratio and spurious suppression characteristic for radar cross section (RCS) reduction is presented. Three periodic metal layers separated by two thin substrate layers are used to compose the designed structure. Second-order and third-order band-pass filter response are performed at the lower and higher band, respectively. Equivalent circuit model (ECM) and full wave simulation results show that the 1-dB transmission bandwidth ranges from 5.12-5.87GHz at the lower band and 15.3-20.99 GHz at the higher band for both TE and TM polarizations. The center frequency band ratio is 3.3. Moreover, the proposed structure provides more than 30 dB attenuation of the rejection band up to 30 GHz. These instructions give you basic guidelines for preparing papers for conference proceedings.