A new miniaturized dual-band FSS with second-order response and independent operating bands

Abstract

In this letter, a new miniaturized dual-band frequency selective surface (FSS) with second-order frequency responses at each band is presented. The proposed structure is designed by cascading three metallic layers that are separated by two thin dielectric substrates. The proposed FSS composed of resonant and non-resonant elements implements two independently controllable pass-bands performance. An equivalent circuit model of the structure is provided to demonstrate the filtering mechanism. The proposed FSS provides stable filtering characteristics and sharp roll-off characteristics centered at Xand Ku-band, respectively. In addition, the proposed FSS exhibits highly stable frequency responses for EM waves of different polarizations and incident angles. A prototype of the FSS was fabricated and measured, the measured results have a good agreement with the simulated ones, which verifies the excellent performance of the proposed new dual-band FSS.

A broadband second-order bandpass frequency selective surface for microwave and millimeter wave application

“…Traditionally, achieving multi-band FSS has involved the use of multi-resonant units 22 – 25 , complementary structures 26 , 27 , and fractal structure designs 28 , 29 . In reference 30 , a two-dimensional double annular periodic array and a grid array are cascaded to create a dual-band FSS.…”