Miniaturised millimetre wave frequency selective surface for atmospheric remote sensing

A miniaturised frequency selective surface (FSS) with λ0/7 x λ0/7 unit cell at the pass band centre frequency is presented for millimetre wave remote sensing. A resonant corner convoluted square ring (CCSR) is loaded with non-resonant cross dipole (CD) for tri-band spectral response. Rectangular patches integrated in the CCSR are used to optimise the coupling between the CD and CCSR to reject 50-60 GHz (B1) and 170-195 GHz (B3), and transmit 87-91 GHz (B2). The FSS fabricated on 175 μm thick quartz with 3721 unit cells indicates polarisation and angle stable transmission response.