A Wideband Circularly Polarized Antenna with a Non-Uniform Metasurface Designed via Multi-Objective Bayesian Optimization

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A Wideband Circularly Polarized Antenna with a Non-Uniform Metasurface Designed via Multi-Objective Bayesian Optimization
Title:
A Wideband Circularly Polarized Antenna with a Non-Uniform Metasurface Designed via Multi-Objective Bayesian Optimization
Journal Title:
IEEE Antennas and Wireless Propagation Letters
Keywords:
Publication Date:
21 February 2024
Citation:
Zeng, Y., Qing, X., & Chia, M. Y.-W. (2024). A Wideband Circularly Polarized Antenna with a Non-Uniform Metasurface Designed via Multi-Objective Bayesian Optimization. IEEE Antennas and Wireless Propagation Letters, 1–5. https://doi.org/10.1109/lawp.2024.3368030
Abstract:
A non-uniform metasurface circularly polarized patch antenna is designed using a genuine multi-objective Bayesian optimization (MOBO) method. Instead of aggregating the performance metrics into a single weighted sum, a genuine MOBO approach is adopted to explore the performance trade-offs, where three important antenna performance metrics, input impedance bandwidth, axial ratio (AR) bandwidth, and gain at boresight, are considered as the optimizing targets. Starting from a reference antenna with a uniform metasurface, the non-uniform metasurface antenna is designed by tuning ten physical design parameters automatically. The optimized antenna achieves an operating bandwidth of 25.6% (3.75 GHz–4.85 GHz) with |S11| < -10dB, axial ratio less than 3 dB, and a maximum realized gain of 7.15 dBic. Compared with the reference antenna, the optimized design realizes a 31% enhancement in operating bandwidth while keeping the identical size of 1.12λ 0 × 0.86λ 0 × 0.069λ 0 (λ 0 is the free space wavelength at center frequency of 4.3 GHz). Good agreement between measurement and simulation results validates the optimization methodology.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - AME Young Individual Research Grants (YIRG)
Grant Reference no. : A2084c0173
Description:
© 2024 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.
ISSN:
1548-5757
1536-1225
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