Single sideband FSS with high image rejection

This is the authors' abstract. We don't add key points for this paper.

The design of a quasi-optical single sideband filter, which provides more than 30 dB of isolation between the frequency bands 294–305.5 and 329.5–341.5 GHz in the TM plane at 45° incidence, is described. The structure, which consists of three free-standing arrays of dipole slot elements, generates a bandpass spectral response with an insertion loss below 0.5 dB at resonance. Simulated and measured transmission coefficients in the range 250–400 GHz are shown to be in good agreement.