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3D conformal bandpass millimeter-wave frequency selective surface with improved fields of view

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posted on 22.06.2021, 12:49 by H Fernández Álvarez, Darren Cadman, Athanasios GoulasAthanasios Goulas, ME de Cos Gómez, Daniel EngstromDaniel Engstrom, J. C. Vardaxoglou, Shiyu Zhang
Conventional planar frequency selective surfaces (FSSs) are characterized in the far-field region and they are sensitive to the incidence angle of impinging waves. In this paper, a spherical dome FSS is presented, aiming to provide improved angular stable bandpass filtering performance as compared to its planar counterpart when the FSS is placed in the near-field region of an antenna source. A comparison between the conformal FSS and a finite planar FSS is presented through simulations at the frequency range between 26 to 40 GHz in order to demonstrate the advantages of utilizing the conformal FSS in the near-field. The conformal FSS is 3D printed and copper electroplated, which leads to a low-cost and lightweight bandpass filter array. Placing it in the near-field region of a primary antenna can be used as radomes to realize compact high-performance mm-wave systems. The comparison between simulated and measured conformal FSS results is in good agreement. The challenges that arise when designing, manufacturing, and measuring this type of structure are reported and guidelines to overcome these are presented.

Funding

SYnthesizing 3D METAmaterials for RF, microwave and THz applications (SYMETA)

Engineering and Physical Sciences Research Council

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History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Scientific Reports

Volume

11

Issue

1

Publisher

Springer Nature

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Springer Nature under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

20/05/2021

Publication date

2021-06-18

Copyright date

2021

eISSN

2045-2322

Language

en

Depositor

Dr Thanos Goulas. Deposit date: 21 June 2021

Article number

12846