Design of Multiband FSS-Radome for Shared Aperture Antenna Application

A novel frequency selective surface structure (FSS) embedded Radome is proposed for multiband operation, which exhibits angular stability and polarization independence. The proposed FSS uses a combination of different patch-type elements in two cascaded layers, forming a thin design that is suitable for aerospace applications. It operates in the frequency bands, S, C, and X with low transmission loss (< −0.5 dB) and excellent isolation (<−20 dB) between each passband. The proposed FSS-radome exhibits angular stability up to 60° for both TE and TM polarizations. Further, a prototype has been fabricated and tested for proof-of-the-concept. The simulated results found to be in good agreement with the measured results. The proposed FSS-embedded Radome can be used to for shared aperture antennas employed for aerospace applications.