Anisotropic Impedance Surfaces for Linear to Circular Polarization Conversion

Efstratios Doumanis, George Goussetis, Vincent Fusco, Robert Cahill, J.L. Gomez-Tornero

Research output: Contribution to journalArticlepeer-review

116 Citations (Scopus)


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. © 2006 IEEE.
Original languageEnglish
Article number6018258
Pages (from-to)212-219
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Issue number1
Publication statusPublished - Jan 2012

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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