Smart-skins for radome using active frequency selective surface

Frequency selective surface (FSS) as one kind of spatial filter is potential for realizing new generation stealth aircraft. The idea of “smart-skins” for radome based on active FSS (AFSS) is proposed in this paper. The PIN diodes are symmetrically loaded into two layer modified square loop slot FSSs with reasonable feeder structure in one A-sandwich radome to achieve the band-pass switching function between two working frequency. The radome's working band is 6.5GHz (at C-band) when the PINs are at OFF state, while working band will be changed to 9.5GHz (at X-band) if the PINs are turned ON. The complete model of “smart-skins” and its performance at different incident angles of TE and TM polarizations are explained and analyzed in this paper.

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