Design of single‐layer bandstop fractal frequency selective surface based on WLAN applications

Abstract In this letter, we present a new frequency selective surface (FSS) for shielding 2.4–2.5 and 4.98–5.825 GHz wireless local area network (WLAN) bands. This FSS structure is based on the traditional Sierpinski octagon improve it. Compared with structure, improved one has smaller element size better angular stability. The design realized float glass relative permittivity () of 8, unit cell 0.1152 λ 0 × ( free space wavelength at first resonant frequency). Wide rejection bandwidths (−10 dB) 910 1630 MHz are obtained GHz, respectively. current distribution equivalent circuit model illustrated to explain resonance behavior proposed FSS. Furthermore, exhibits stable response incident angles 0°–80° under transverse electric magnetic polarizations. Finally, was fabricated measured. measured results demonstrate that good performance in WLAN applications.