Bandpass frequency selective surface using asymmetrical slot four arms star geometry

In this article, the authors proposed a bandpass frequency selective surface using the slot four arms star geometry. An expression to calculate the resonance frequency is introduced, for which results with difference <6%, when compared to measured ones, were obtained. The polarization dependence was discussed and a model based on two independent equivalent structures was successfully presented. Three prototypes were designed, fabricated, and characterized. A good agreement between simulated and measured results is observed. With the asymmetrical geometry, two bandpass bandwidths, separated by a notch band‐rejection, were achieved, a suitable characteristic to avoid co‐channel interferences. Furthermore, if an orthogonal polarization is applied, this notch band‐rejection can be converted to a bandpass bandwidth, providing a polarization filter behavior. The geometry simplicity and observed frequency response make the proposed FSS potentially attractive for many telecommunication systems. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1105–1109, 2016