A novel element of frequency selective surface for radome

Based on the Y element, a novel element for the Frequency selective surface ( FSS) is presented in this paper. The transmission characteristics of Y element FSS and the novel element FSS is calculated using Galerkin' s method in the spectral domain, and the optimum parameters of the FSS is obtained. The corresponding equivalent FSS sample plate was fabricated. It's transmission characteristics were measured by microwave network analyzer at 8-12 GHz. The agreement between the calculated and measured values was good. The results show that, the novel element FSS has excellent transmission characteristic at large-angle incidence, the transmission coefficient is - 0.52 dB at TE 66 degrees incidence. From 0 degrees to 66 degrees TE incidence, the drift of the resonant frequency is 200 MHz. Meanwhile the transmission coefficient of Y element FSS is - 0. 82 dB at TE 66 degrees incidence, and from 0 degrees to 66 degrees TE incidence, the drift of the resonant frequency is 400 MHz. Therefore, the novel element FSS is more suitable than Y element FSS for the application in large-angle incidence curved streamlined radome.