A Wideband Low-RCS Metasurface-Inspired Circularly Polarized Slot Array Based on AI-Driven Antenna Design Optimization Algorithm

A metasurface (MS)-inspired low-profile circularly polarized (CP) slot array with a wide CP band and broadband low radar cross section (RCS) is proposed in this communication. The slot array consists of four element antennas, four grounded substrates, and a sequential-rotated feeding network. In ter...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2022-09, Vol.70 (9), p.8584-8589
Main Authors: Zheng, Qi, Guo, Chenjiang, Ding, Jun, Akinsolu, Mobayode O., Liu, Bo, Vandenbosch, Guy A. E.
Format: Article
Language:English
Subjects:
Algorithms
Antenna array
Antenna arrays
Antenna design
Antennas
Artificial intelligence
Bandwidths
Broadband
Broadband antennas
Circular polarization
Design optimization
Design parameters
Gain
metasurface (MS)
Metasurfaces
Optimization
parallel surrogate model-assisted hybrid differential evolution for antenna optimization (PSADEA)
Radar antennas
radar cross section (RCS)
Radar cross sections
Reduction
Slot antennas
Substrates
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Summary:A metasurface (MS)-inspired low-profile circularly polarized (CP) slot array with a wide CP band and broadband low radar cross section (RCS) is proposed in this communication. 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 MS-based superstrate. The feeding network with multiple related design parameters is optimized by an artificial intelligence (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 \vert \text{S}_{11}\vert < -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 MS unit cells. A prototype was fabricated and measured. The measured and simulated results are in good agreement.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2022.3161389