Metasurface-Based Method for Broadband RCS Reduction of Dihedral Corner Reflectors with Multiple Bounces

Anuj Y. Modi, Meshaal A. Alyahya, Constantine A. Balanis, Craig R. Birtcher

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A broadband technique to reduce the radar cross section (RCS) of complex targets is presented. In such targets, multiple-bounce mechanism dominates their RCS. The proposed technique demonstrates that by treating the multiple-bounce mechanism as a cascaded phenomenon, the problem then simplifies to identifying and implementing a set of orthogonal functions. Robust guidelines for avoiding grating lobes are provided using array theory. The 90° dihedral corner is used to verify the proposed technique. Measurements are reported for a fabricated prototype with artificial magnetic conductor (AMC) technology where a 70% RCS-reduction bandwidth is observed. To generalize the method, a 45° dihedral corner, with quadruple-bounce mechanism, is considered. Generalized guidelines are summarized and applied to reduce the RCS of complex targets using the proposed method.

Original languageEnglish (US)
Article number8910548
Pages (from-to)1436-1447
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Volume68
Issue number3
DOIs
StatePublished - Mar 2020

Keywords

  • Array theory
  • RCS reduction
  • artificial magnetic conductor (AMC)
  • checkerboard metasurface
  • complex targets
  • dihedral corners
  • high-frequency asymptotic methods
  • metasurfaces
  • orthogonality principles
  • phase-gradient metasurface
  • physical optics (PO)
  • radar cross section (RCS)
  • scattering cancellation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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