Time Modulated Reflectarray Unit-Cells with Nonreciprocal Polarization Control

S. Spatola, J. S. Gomez-Diaz, E. Carrasco

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

Abstract

This contribution explores nonreciprocal and reconfigurable reflectarray unit-cells with full polarization control based on time-modulated resonators. To this purpose, a unit-cell operating in the X-band is designed to aperture-couple each polarization of the impinging fields through a patch into a substrate integrated waveguide (SIW). The SIWs are loaded with varactor diodes which are biased using coplanar waveguides printed on the back side of the ground plane. There, upon adequate modulation parameters, waves undergo an efficient conversion process towards a desired harmonic and are then radiated back to free space. The photonic Aharonov-Bohm effect is exploited on each cells through modulation signals to independently control the phase and amplitude of the fields radiated with each polarization, thus allowing to obtain any polarization state and achieve nonreciprocity at the polarization level. We envision that this technology will have important implications in wireless terrestrial and satellite communication systems.

Original languageEnglish (US)
Title of host publication14th European Conference on Antennas and Propagation, EuCAP 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9788831299008
DOIs
StatePublished - Mar 2020
Event14th European Conference on Antennas and Propagation, EuCAP 2020 - Copenhagen, Denmark
Duration: Mar 15 2020Mar 20 2020

Publication series

Name14th European Conference on Antennas and Propagation, EuCAP 2020

Conference

Conference14th European Conference on Antennas and Propagation, EuCAP 2020
CountryDenmark
CityCopenhagen
Period3/15/203/20/20

Keywords

  • nonreciprocal antennas
  • polarization control
  • Reflectarray antennas
  • substrate integrated waveguide

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Instrumentation
  • Radiation

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