Quasi-Optical Frequency Selective Surface for Atmospheric Remote Sensing Application

Abstract

Abstract-The design of an efficient quasi-optics Frequency Selective Surface (FSS) filter which is required to provide a −3 dB pass band from 405 GHz to 441 GHz is presented. For atmospheric remote sensing application, this space-borne spatial device consists of a silicon layer and a thin copper layer which is perforated with periodic arrays of resonant dipole slots and circular apertures. FSS unit cell has a dimension much smaller than its operating wavelength. Unique features of this complex dense FSS structure include wide pass band properties with superb performance of frequency response and incident angles independence for TE polarization. Floquet mode analysis and finite element method (FEM) models are used to establish the geometry of the periodic structure and predict its spectral response.

Frequency and polarisation selective surface for sub‐millimetre wave atmospheric remote sensing

“…The FSS with the I‐slot unit cell separated the bands 164–191.3 GHz and 228–230 GHz in the TE polarisation [23]. The periodic arrays of resonant dipole slots with circular apertures [24] and the sub‐wavelength circular ring with a split‐ring resonator [25] bring good performance in atmospheric remote sensing. The Genetic Algorithm empowered us to obtain the requisite spectral response in sub‐millimetre wave.…”

“…The Genetic Algorithm empowered us to obtain the requisite spectral response in submillimetre wave. The initial unit cell of FSS is determined by the Periodic Method of Moment, and the Genetic Algorithm optimises the frequency response [26,27].…”