Bandwidth comparison of rectangular and offset cross-slot frequency-selective surface polarisation transformers

Sarah Clendinning*, Robert Cahill, Dmitry Zelenchuk, Vincent Fusco

*Corresponding author for this work

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This letter compares the 3 dB axial ratio (AR) bandwidth (BW) of transmission mode single-screen linear-to-circular polarisation convertors based on three different slot topologies. Using a conventional centre-connected cross-slot arrangement as a baseline, we show that a significant performance improvement can be achieved by creating a more elaborate design with unit cells composed of multiple unequal length offset rectangular-shaped apertures. The additional flexibility to tailor the shape of the Transverse Electric (TE) and Transverse Magnetic (TM) spectral amplitude and phase responses is exploited to achieve an 84% increase in the BW relative to the baseline for a freestanding structure, which is designed to work at a centre frequency of 10.0 GHz. Experimental AR results are used to verify the new design methodology.

Original languageEnglish
Pages (from-to)372-374
Number of pages3
JournalIET Electronic Letters
Issue number9
Early online date22 Mar 2021
Publication statusPublished - 23 Apr 2021

Bibliographical note

Funding Information:
The first author was supported by a PhD scholarship funded by the Department for the Economy (DfE) Northern Ireland.

Publisher Copyright:
© 2021 The Authors. Electronics Letters published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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