Anisotropic impedance surfaces for linear to circular polarization conversion

Efstratios Doumanis, George Goussetis, Jose Luis Gomez-Tornero, Robert Cahill, Vincent Fusco

Research output: Contribution to journalArticlepeer-review

102 Citations (Scopus)

Abstract

Anisotropic impedance surfaces are employed as low-profile and broadband reflectors that convert orthogonal linear to right- and left-handed circular polarization respectively. By virtue of anisotropy, it is possible to independently control the reflection characteristics of two orthogonal linearly polarized incident plane waves and therefore achieve linear to circular polarization conversion. Equivalent circuits for anisotropic impedance surfaces with arbitrarily shaped elements are employed to demonstrate the operating principle and a design procedure is proposed. The proposed design procedure is demonstrated by means of an example involving a dipole array. A prototype is designed and its performance characteristics are evaluated. The 3-dB relative axial ratio bandwidth exceeds 60%, while low loss and angular stability are also reported. Numerical and experimental results on a fabricated prototype are presented to validate the synthesis and the performance.

Original languageEnglish
Pages (from-to)212-219
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Volume60
Issue number1
DOIs
Publication statusPublished - Jan 2012

Keywords

  • DESIGN
  • LAYER
  • polarization conversion
  • FSS
  • ARTIFICIAL MAGNETIC CONDUCTOR
  • frequency-selective surfaces
  • FREQUENCY-SELECTIVE SURFACES
  • ANTENNAS
  • ISOLATOR
  • high-impedance surfaces
  • BAND
  • CONVERTER
  • Circular polarization
  • GROUNDED DIELECTRIC SLAB

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