Efficient Synthesis of Large Finite Patch Arrays for Scanning Wide-Angle Anomalous Reflectors

Sravan K. R. Vuyyuru, Risto Valkonen, Sergei A. Tretyakov, Do-Hoon Kwon

Research output: Contribution to journalArticleScientificpeer-review

Abstract

A design methodology for planar loaded antenna arrays is proposed to synthesize a perfect anomalous reflection into an arbitrary direction by optimizing the scattering characteristics of passively loaded array antennas. It is based on efficient and accurate prediction of the induced current distribution and the associated scattering for any given set of load impedances. For a fixed array of finite dimensions, the deflection angles can be continuously adjusted with proper tuning of each load. We study and develop anomalous reflectors as semi-finite (finite × infinite) and finite planar rectangular arrays comprising printed patches with a subwavelength spacing. Anomalous reflection into an arbitrary desired angle using purely reactive loads is numerically and experimentally validated. Owing to the algebraic nature of load optimization, the design methodology may be applied to the synthesis of large-scale reflectors of practical significance.
Original languageEnglish
JournalIEEE Open Journal of Antennas and Propagation
DOIs
Publication statusE-pub ahead of print - 24 Sept 2024
MoE publication typeA1 Journal article-refereed

Keywords

  • receiving antennas
  • reflectarray
  • far-field scattering
  • Aperiodic loadings
  • Anomalous reflector
  • reconfigurable intelligent surface (RIS)

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