Design of a low-THz linear-to-circular polarization conversion metasurface

Evangelos Vassos, James Churm, Alexandros Feresidis*

*Corresponding author for this work

Research output: Contribution to conference (unpublished)Paperpeer-review


A study on designing a linear polarization (LP) to circular polarization (CP) converter at low THz frequencies is presented. The proposed design is composed of a periodic arrangement of 4-micron thick gold, anisotropic patches deposited on a quartz substrate, with a gold ground plane backing the wafer. The materials were chosen to minimize reflection loss, with the quartz providing an optically flat surface. Simulations have been carried out using CST Microwave Studio to extract and evaluate the operation bandwidth and the reflection losses of the proposed design. The design achieves more than 120 GHz left handed circular polarization (LHCP) bandwidth and more than 65 GHz right handed circular polarization (RHCP) bandwidth with 3 dB axial ratio bandwidth more than 89.9% and a 3 dB axial ratio bandwidth of 26.5% respectively. The proposed design can be fabricated using standard microfabrication methods.

Original languageEnglish
Publication statusPublished - 2019
EventAntennas and Propagation Conference 2019, APC 2019 - Birmingham, United Kingdom
Duration: 11 Nov 201912 Nov 2019


ConferenceAntennas and Propagation Conference 2019, APC 2019
Country/TerritoryUnited Kingdom


  • Enhanced bandwidth
  • Low THz
  • LP to CP conversion
  • Metasurface
  • Polarization converters

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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