Abstract
A single-layered triband transmissive/reflective frequency selective surface (FSS) with incident angle up to 80° and polarization stability is designed, simulated, and measured. The periodic element includes a compact hexagonal arrangement of Y-slot and Y-patch, which can effectively reduce unit spacing to 0.16 $\lambda $ . Compared with the conventional hexagonal arrangement, compact arranged Y-unit has a larger band range from 1 to 40 GHz using grating lobes suppression. Controllable passband in X -band and reflectband in Ku -band and Ka -band are proposed. Transmission loss is less than 1 dB in 9.41 GHz in bandwidth of 5% when the incident angle is from 0° to 80°, while the return loss in bandwidth of 5% when 14.5 and 35 GHz is less than about 1 dB when incident angle range is from 0° to 80°/60° for dual polarization, respectively. Hyperboloid FSS is simulated, and performance of transmission and reflection is good. To the best of our knowledge, this is the first report of single-layered FSS that simultaneously operates for angle of incidence more than 60° in X/Ku/Ka -bands for dual polarization.
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