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Coding engineered reflector for wide-band RCS reduction under wide angle of incidence

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journal contribution
posted on 2022-06-13, 13:49 authored by Mustafa K Taher Al-Nuaimi, Guan-Long Huang, William WhittowWilliam Whittow, Dong Wang, Rui-Sen Chen, Sai-Wai Wong, Kam-Weng Tam

This article presents the design of 1-bit coding engineered reflector for wideband monostatic/bistatic radar cross section (RCS) reduction under wide-angle of incidence by redirecting the backscattered electromagnetic (EM) energies into wide and countless angles. The proposed surface can achieve an excellent monostatic/bistatic RCS reduction performance of more than 10 dB over a wide frequency range from 60 – 120 GHz under wide-angles of incidence up to 75°. This is achieved by designing a wide-band anisotropic polarization rotator unit cell with a relative polarization conversion bandwidth of 66.7% and polarization conversion efficiency of more than 99%. The unit cell and its mirrored version are used to represent the “0” and “1” coding states of an optimized 1-bit coding sequence. The distribution of the “0” and “1” coding states and the dimensions of the anisotropic unit cell are optimized carefully such that the unit cell will have 180°±30° reflection phase difference between x- and y-axes over the whole three frequency bands (V-, E-, and W-bands), and obtains ultra-wideband and wide-angle diffusion scattering patterns under oblique incidence up to 75°. The simulation and experimental results show that the proposed coding engineered reflector has nearly uniform diffusive scattering characteristics under normal and wide-angle off-normal incidences of EM-waves up to 75° over the three frequency bands.

Funding

Anisotropic Microwave/Terahertz Metamaterials for Satellite Applications (ANISAT)

Engineering and Physical Sciences Research Council

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History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Transactions on Antennas and Propagation

Volume

70

Issue

10

Pages

9947 - 9952

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Version

  • AM (Accepted Manuscript)

Rights holder

© IEEE

Publisher statement

© 2022 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.

Acceptance date

2022-05-22

Publication date

2022-06-07

Copyright date

2022

ISSN

0018-926X

eISSN

1558-2221

Language

  • en

Depositor

Prof Will Whittow. Deposit date: 9 June 2022

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