Design of Circularly Polarized and Highly Depointing Reflectarrays with high polarization purity

Andrea Guarriello*, Daniele Bresciani, Hervé Legay, George Goussetis, Renaud Loison

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work aims to investigate the limitations and possible solutions in designing highly tilted radiation pattern reflectarrays working in double circular polarization and fed by an onset single primary source. To this extent, three single-layer monolithic reflectarrays, producing a pencil beam at increasing radiation angles with high X-polarization discrimination (XPD) have been designed and analyzed. A direct optimization technique shows that an XPD=20 dB can be attained for radiation patterns pointing at sixty degrees, at the cost of co-polarised directivity degradation. An analysis of the target aperture fields, obtained through backscattering techniques, shows that an amplitude modulation on the aperture field components is necessary to obtain highly tilted radiation patterns with high XPD. Since reflectarray cells are not able to produce such amplitude components unbalance, an elliptically polarized source is considered, producing an incident field components amplitude unbalance that results in a radical reduction of the X-polarization levels.

Original languageEnglish
Title of host publication16th European Conference on Antennas and Propagation (EuCAP 2022)
PublisherIEEE
ISBN (Electronic)9788831299046
DOIs
Publication statusPublished - 11 May 2022
Event16th European Conference on Antennas and Propagation 2022 - Madrid, Spain
Duration: 27 Mar 20221 Apr 2022

Conference

Conference16th European Conference on Antennas and Propagation 2022
Abbreviated titleEuCAP 2022
Country/TerritorySpain
CityMadrid
Period27/03/221/04/22

Keywords

  • circular polarization
  • optimization
  • reflectarray
  • tilted beam

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Radiation

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