Performance enhancement of square-ring antennas exploiting surface-wave metasurfaces

Mohammed S. Alharbi, Constantine A. Balanis, Craig R. Birtcher

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


This letter proposes a technique to enhance the performance of a square-ring antenna by exciting surface waves. An asymmetrical metasurface (MS) is utilized to control the surface-wave resonances at different planes. To excite the surface waves, various configurations have been considered, namely, square-ring element above, below, and within the MS. The latter design, with a 0.07 λo height profile, provides superior matching and gain performances compared to the others. It operates from 3.8 to 5 GHz (27% fractional bandwidth) with a stable realized gain up to 11.9 dBi in the broadside direction. A prototype of the structure, with a simple probe-feeding mechanism, was fabricated and measured. An excellent agreement was attained between the simulated and measured data.

Original languageEnglish (US)
Article number8805333
Pages (from-to)1991-1995
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Issue number10
StatePublished - Oct 2019


  • Low profile
  • Metasurface (MS) ground plane
  • Square-ring antennas
  • Surface-wave antenna

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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