A wideband low-RCS metasurface-inspired circularly polarized slot array based on AI-driven antenna design optimization algorithm

Zheng, Q., Guo, C., Ding, J., Akinsolu, M. O., Liu, B. and Vandenbosch, G. A. E. (2022) A wideband low-RCS metasurface-inspired circularly polarized slot array based on AI-driven antenna design optimization algorithm. IEEE Transactions on Antennas and Propagation, 70(9), pp. 8584-8589. (doi: 10.1109/TAP.2022.3161389)

Abstract

A metasurface-inspired low-profile circularly polarized (CP) slot array with a wide CP band and broadband low radar cross section (RCS) is proposed in this paper. The slot array consists of four element antennas, four grounded substrates, and a sequential-rotated feeding network. In terms of radiation performance, the array yields a wide CP band resulting from the CP element antenna and the sequential-rotated feeding network. The CP element antenna is achieved due to the polarization conversion property of the metasurface-based superstrate. The feeding network with multiple related design parameters is optimized by an AI-driven antenna design method to find the widest bandwidth. In terms of scattering performance, broadband RCS reduction is achieved by using a hybrid RCS reduction technique that combines two destructive interference principles. The |S11|<-10 dB bandwidth reaches 53.2%, the AR < 3 dB bandwidth reaches 50%, and the RCS reduction bandwidth reaches 147.8% for a low-profile structure with a relatively low number of metasurface unit cells. A prototype was fabricated and measured. The measured and simulated results are in good agreement.

• Item Type: Articles
• Additional Information: This work was supported in part by Natural Science Foundation of Shanghai (No.21ZR1424300) and China Scholarship Council (No. 201806290108).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Liu, Professor Bo
• Authors: Zheng, Q., Guo, C., Ding, J., Akinsolu, M. O., Liu, B., and Vandenbosch, G. A. E.
• College/School: College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
• Journal Name: IEEE Transactions on Antennas and Propagation
• Publisher: IEEE
• ISSN: 0018-926X
• ISSN (Online): 1558-2221
• Published Online: 28 March 2022
• Copyright Holders: Copyright © 2022 IEEE
• First Published: First published in IEEE Transactions on Antennas and Propagation 70(9): 8584-8589
• Publisher Policy: Reproduced in accordance with the publisher copyright policy