Design of Frequency Selective Surface Structure With High Angular Stability for Radome Application

TLDR

The proposed method improves bandwidth angular stability, making the resulting FSS structure more suitable for radome construction. The letter proposes a design method for FSS structures with high angular stability. The method uses bandwidth compensation and curve‑fitting to derive structural parameters from target frequency and bandwidth, and a 15‑GHz, 2‑GHz‑wide FSS was designed, fabricated, and measured to validate the approach. The authors discuss improving bandwidth design accuracy and report good agreement between simulations and measurements.

Abstract

A design method for frequency selective surface (FSS) structure with high angular stability has been proposed in this letter. In the proposed method, bandwidth angular stability of FSS structure has been improved by adopting the bandwidth compensation technique, and structural parameters can be obtained with a curve-fitting method from the desired resonate frequency and bandwidth. Discussions on improving the bandwidth design accuracy have been presented. By taking bandwidth angular stability into consideration, the structure designed by the proposed method is more suitable to construct FSS radome. For verification, an FSS structure operating at 15 GHz with a bandwidth of 2 GHz has been designed, fabricated, and measured. Good agreements between the simulated and measured results can be observed.