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Design and fabrication of 3D-printed high gain broadband Fresnel zone lens using hybrid groove-perforation method for millimeter-wave applications

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journal contribution
posted on 04.10.2021, 13:33 by Shiyu Zhang, Pai Liu, William WhittowWilliam Whittow
This letter presents a novel hybrid design approach for the Fresnel zone lenses (FZL). The method combines the two conventional design approaches: grooved and perforated methods. Perforated lenses minimize the shadow blockage that grooved lenses suffer from, and therefore provide improved antenna gain. However, the fabrication of the low refractive index regions in the perforated lenses is challenging due to the limited manufacturing resolution, which means low refractive index dielectrics cannot be realized. The proposed hybrid FZL design utilizes the perforated method for the inner regions and applies the grooved method for the outer regions. This paper describes the equations used to optimize the design and gives the general design guidelines. A hybrid FZL antenna that operates at the center frequency of 33 GHz is presented. Measurement results show that the hybrid FZL improved the realized gain by up to 3.2 dB and the -3 dB gain bandwidth by up to 2 GHz when compared with the equivalent grooved FZL.

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

IEEE Antennas and Wireless Propagation Letters

Volume

21

Issue

1

Pages

34 - 38

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by IEEE 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/

Publication date

2021-10-01

Copyright date

2022

ISSN

1536-1225

eISSN

1548-5757

Language

en

Depositor

Prof Will Whittow. Deposit date: 4 October 2021