期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 70, 期 9, 页码 8584-8589出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3161389
关键词
Antenna array; circular polarization; metasurface (MS); parallel surrogate model-assisted hybrid differential evolution for antenna optimization (PSADEA); radar cross section (RCS)
资金
- Natural Science Foundation of Shanghai [21ZR1424300]
- China Scholarship Council [201806290108]
This paper proposes a low-profile circularly polarized slot array based on a metasurface (MS), which has a wide CP band and broadband low radar cross section (RCS). The array achieves wide CP band and broadband RCS reduction through the CP element antenna and the optimized feeding network.
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 vertical bar S-11 vertical bar < -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.
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