TY - JOUR
T1 - Vehicle metastructure skin designed by overall-parameter evolutionary optimization for broadband microwave absorption
AU - Shan, Mengtong
AU - Zhang, Yuhui
AU - Lei, Han
AU - Zhao, Pengzhen
AU - Yu, Chen
AU - Huang, Yixing
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/2/8
Y1 - 2023/2/8
N2 - Metastructure fabricated by electromagnetic lossy materials has been proved to be an effective approach to achieve broadband microwave absorption in civil and military usage. However, complicated structure surface of metastructure hinders further applications for deployment on vehicles and aircraft as aerodynamic properties are poor and turbulence will be generated. Herein, a vehicle metastructure skin (VMS) is proposed to maintain even surface of metastructure for better aerodynamics without sacrificing broadband absorption performance. An overall-parameter evolutionary optimization scheme is proposed to solve severe impedance mismatch between metastructure and air with quartz fiber reinforced composite (QFRC) as aerodynamic skin. The fabricated VMS achieved −10 dB absorption performance in 1.26–25.8 GHz. Under sudden fluctuation of surface impedance, extensional absorption in low frequency range below 2 GHz is realized. Wide-angle oblique broadband absorption is also achieved in TE and TM polarization. With the proposed optimization strategy, the aerodynamic problems brought by surface turbulence in secondary structure of metastructure are solved.
AB - Metastructure fabricated by electromagnetic lossy materials has been proved to be an effective approach to achieve broadband microwave absorption in civil and military usage. However, complicated structure surface of metastructure hinders further applications for deployment on vehicles and aircraft as aerodynamic properties are poor and turbulence will be generated. Herein, a vehicle metastructure skin (VMS) is proposed to maintain even surface of metastructure for better aerodynamics without sacrificing broadband absorption performance. An overall-parameter evolutionary optimization scheme is proposed to solve severe impedance mismatch between metastructure and air with quartz fiber reinforced composite (QFRC) as aerodynamic skin. The fabricated VMS achieved −10 dB absorption performance in 1.26–25.8 GHz. Under sudden fluctuation of surface impedance, extensional absorption in low frequency range below 2 GHz is realized. Wide-angle oblique broadband absorption is also achieved in TE and TM polarization. With the proposed optimization strategy, the aerodynamic problems brought by surface turbulence in secondary structure of metastructure are solved.
KW - Broadband microwave absorption
KW - Evolutionary optimization
KW - Multifunctional composite
KW - Nano lossy composite
KW - Vehicle metastructure skin
UR - http://www.scopus.com/inward/record.url?scp=85144471783&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2022.109880
DO - 10.1016/j.compscitech.2022.109880
M3 - Article
AN - SCOPUS:85144471783
SN - 0266-3538
VL - 232
JO - Composites Science and Technology
JF - Composites Science and Technology
M1 - 109880
ER -