Terahertz Frequency-Selective Surface With Polarization Selection and Conversion Characteristics

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Original languageEnglish
Pages (from-to)510-519
Journal / PublicationIEEE Transactions on Terahertz Science and Technology
Issue number5
Online published11 Jul 2019
Publication statusPublished - Sept 2019


In this paper, a novel frequency selective surface (FSS) with polarization selection and dual-band polarization conversion characteristics is proposed for terahertz applications. The FSS is composed of two layers of metallic periodic arrays separated by a polymer dielectric spacer. The top and bottom arrays provide bandpass and bandstop characteristics for TE- and TM-polarized incidences, respectively. Geometrical parameters of the top and bottom arrays are tuned such that the phase differences of the TE and TM transmissions at the lower (f1) and upper (f2) crossover frequency points are -90° and +90°, respectively. Therefore, for normal incidence, a 45o linearly-polarized incident wave is converted into a right-handed circularly-polarized and left-handed circularly polarized transmitted wave at f1 and f2, respectively. Equivalent circuit models are established to explain the operation principle of the proposed FSS. A prototype is fabricated using micromachining with its transmission characteristics, namely, polarization selectivity and dual-band polarization conversion, validated by time-domain and frequency-domain measurements.

Research Area(s)

  • Converters, Electric fields, Equivalent circuits, frequency selective surface (FSS), Integrated circuit modeling, polarization conversion, Resonant frequency, Resonators, Terahertz (THz)