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• W4281662414 abstract "We report the first conformal ultrawideband (UWB) array on a doubly curved surface for wide-angle electronic scanning. We use a quadrilateral mesh as the basis for systematically arraying UWB radiators on arbitrary surfaces. A prototype consisting of a 52-element, dual-polarized Vivaldi array arranged over a 181 mm diameter hemisphere is developed. The antennas and SMP connectors are 3-D printed out of titanium to allow for simple fabrication and assembly. We derive the theoretical gain of a hemispherical array based on the antenna size and number of elements. The measured realized gain of the prototype array is within 2 dB of the theoretical value from 2 to 18 GHz and scan angles out to 120° from the <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${z}$ </tex-math></inline-formula> -axis. This field of view is twice that of a planar array with the same diameter in agreement with theory. This work provides a baseline performance for larger conformal arrays that have more uniform meshes. Furthermore, the basic concept can be extended to other UWB radiating elements." @default.
• W4281662414 created "2022-06-13" @default.
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• W4281662414 date "2022-10-01" @default.
• W4281662414 modified "2023-10-01" @default.
• W4281662414 title "An UWB Hemispherical Vivaldi Array" @default.
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• W4281662414 doi "https://doi.org/10.1109/tap.2022.3177482" @default.
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