Dual Band Dual Polarized Aperture Coupled Based Frequency Selective Surface

A polarization rotation second order dual-band aperture coupled based frequency selective surface (FSS) is presented in this letter. It produces different polarization rotation angle for both the bands. The corner truncated square patch resonators are used to examine dual-band responses. The patch resonators are placed back-to-back through metallic aperture coupled layer in the middle. Two passband responses are obtained with sub-patch resonator I (SPR I) and sub-patch resonator II (SPR II) patch resonators. In first passband, two orthogonal component provide 18 0 degrees $18{0}<^>{\circ }$ phase difference. Similarly, in second passband 0 degrees ${0}<^>{\circ }$ phase difference is occur. Thus, rotation in polarization is occurs in both passband. The prototype of the proposed FSS is fabricated and simulation results are verified with measured results.