Frequency selective surface using nested split ring slot elements as a lens with mechanically reconfigurable beam steering capability

Vincent Fusco, Matthias Euler

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

The design is described of a double layer frequency selective surface which can produce a differential phase shift of 180 ° as the wave propagates through it at normal incidence. The hand of an applied circularly polarized signal is reversed due to the 180° phase shift, and it is demonstrated that the exit circularly polarized output signal can be phase advanced or phase retarded by 180 ° upon rotation of the elements comprising the structure. This feature allows the surface to act as a spatial phase shifter. In this paper the beam steering capabilities of a 10 × 10 array of such elements are demonstrated. Here the individual elements comprising the array are rotated relative to each other in order to generate a progressive phase shift. At normal incidence the 3 dB Axial Ratio Bandwidth for LHCP to RHCP conversion is 5.3% and the insertion loss was found to be -2.3 dB, with minimum axial ratio of 0.05 dB. This array is shown to be able to steer a beam from -40 ° to +40 ° while holding axial ratio at the pointing angle to below 4 dB. The measured radiation patterns match the theoretical calculation and full-wave simulation results. © 2010 IEEE.
Original languageEnglish
Article number5498944
Pages (from-to)3417-3421
Number of pages5
JournalIEEE Transactions on Antennas and Propagation
Volume58
Issue number10
DOIs
Publication statusPublished - Oct 2010

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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