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One‐dimensional conformal ultra‐wideband connected slot arrays with reduced scattering
Author(s) -
Zhang Zhechen,
Guo Xingyuan,
Chen Yikai,
Qu ShiWei,
Yang Shiwen
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22802
Subject(s) - conformal map , conformal antenna , scattering , metamaterial , optics , standing wave ratio , reduction (mathematics) , aperture (computer memory) , radiation , physics , materials science , antenna (radio) , radiation pattern , acoustics , computer science , microstrip antenna , mathematics , telecommunications , slot antenna , geometry
A one‐dimensional (1‐D) ultra‐wideband conformal connected slot array with reduced scattering characteristics is presented. The proposed array accomplishes a practical design completely conformal to a wing platform by closely attaching the antenna aperture to the curved surface. A conformal metamaterial absorber (CMA) structure is employed to control the out‐of‐band scattering, and the resistive patches are analyzed for the reduction of radiation loss. Additionally, a parasitic metal block is introduced for the improvement of VSWRs in the low‐frequency band. The designed 1‐D infinite array is able to achieve 4:1 impedance bandwidth from 0.5 to 2.0 GHz with an active VSWR <3.0 for scanning up to ±45°. In comparison with the reference array, a significant monostatic scattering reduction is achieved from 6.0 to 18.0 GHz with the radiation performances well preserved. The overall thickness of the conformal array is only about 0.31λ h at the highest operating frequency. A 2 × 8 conformal array prototype is fabricated and measured. Measured results are in good agreement with simulated ones, thus demonstrating effectiveness.