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Low-cost ultrawideband high-gain compact resonant cavity antenna

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journal contribution
posted on 03.08.2020, 10:28 by Touseef Hayat, Muhammad U. Afzal, Foez Ahmed, Shiyu Zhang, Karu P. Esselle, J. C. Vardaxoglou
A 3-D printed planar permittivity-gradient superstrate (PGS) is used to improve the directive radiation characteristics of a waveguide-fed compact resonant cavity antenna (CRCA). Far-field directivity of classical uniform superstrate-based RCAs is limited due to nonuniform aperture phase distribution caused by even transmission through the superstrate. Transverse PGS has been used here to remarkably improve aperture phase distribution and hence directive radiation performance of RCAs. Furthermore, the PGS was rapidly prototyped in one hour and 43 min using a low-cost acrylo-butadiene styrene (ABS) filament without using traditional multistep milling and machining. Single step fabrication was performed and effective dielectric constant of the ABS was varied through controlled infill percentage in different regions of the PGS. Measurements of a prototype indicate unrivaled results, from a smaller footprint, which includes peak directivity of 16.048 dB, 3 dB directivity bandwidth of 49.65% and sidelobe levels lower than -10.4 dB throughout the operating frequency band. The 3-D printed PGS thus outperforms all previously reported superstrates, for RCAs, by demonstrating similar radiation performance with an equivalent material cost of only 0.41 USD.

Funding

International Macquarie University Research Excellence Scholarship (iMQRES), under Grant 2017062/20181097.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Antennas and Wireless Propagation Letters

Volume

19

Issue

7

Pages

1271 - 1275

Publisher

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.

Acceptance date

23/05/2020

Publication date

2020-05-27

Copyright date

2020

ISSN

1536-1225

eISSN

1548-5757

Language

en

Depositor

Dr Shiyu Zhang. Deposit date: 2 August 2020