2019-PB-Metasurface - AWPL - Revised-Accepted - Final_Submitted.pdf (1.3 MB)
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Aperiodic sunflower like metasurface for diffusive scattering and RCS reduction

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posted on 18.03.2020, 10:23 authored by Mustafa K Taher Al-Nuaimi, Wei Hong, William WhittowWilliam Whittow
This article presents the design of aperiodic sunflower-like metasurface for circularly polarized (CP) wave diffusion and radar cross section (RCS) reduction using Pancharatnam-Berry (PB) meta-atoms. The distribution of the PB meta-atoms across the metasurface aperture is non-uniform and has a sunflower seeds like distribution, i.e., outwardly logarithmic spiral lattice of no transitional periodicity. The proposed metasurface has 600 PB meta-atoms of sub-wavelength size of 5 mm ≈ ${0.33\lambda_{20GHz}}$ and exhibits a randomly chosen diffusive reflection phase between 0o and 360o. Both simulated and experimental results demonstrate that the proposed sunflower-like metasurface can efficiently diffuse the backscattered energy into numerous directions when normally illuminated by a CP-wave with RCS reduction > 7 dB from 16 GHz to 23.8 GHz. Furthermore, the low-level diffuse scattering can be preserved under oblique incidence up to 60o. As a result of using PB concept, the polarization sensitivity of the proposed metasurface is released and this is highly desired in applications when the polarization of the incoming wave is typically unknown.

Funding

EPSRC grant: 'ANISAT', EP/S030301/1

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Antennas and Wireless Propagation Letters

Volume

19

Issue

7

Pages

1048 - 1052

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Version

AM (Accepted Manuscript)

Rights holder

© IEEE

Publisher statement

© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Publication date

2020-03-16

Copyright date

2020

ISSN

1536-1225

eISSN

1548-5757

Language

en

Depositor

Dr Will Whittow. Deposit date: 17 March 2020

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