3D Conformal Metasurfaces for RCS reduction of 3D Targets at Microwave Frequencies
2023 International Conference on Microwave and Millimeter Wave Technology (ICMMT)(2023)
摘要
It is noted that most of the reported metasurfaces in the literature were mostly designed to have a flat geometry, and their radar cross section (RCS) reduction performances in the non-planar scenarios was rarely investigated. In this paper, the RCS reduction performances of a metasurface when attached to a conformal (3D) metallic object is investigated. Four 3D objects are considered in this paper include cylindrical, spherical, sphere-cylinder, and the well-known NASA-almond. When the proposed metasurface is attached to a 3D object, it can achieve more diffused scattering patterns and wide scattering angles for both monostatic and bistatic RCS regardless of polarization of the incident waves and for a wide range incident angles. It is found that the proposed metasurface when attached to a 3D metallic object under normal and oblique incidence up to 60°, it can achieve more than 10 dB monostatic/bistatic RCS reduction from 12 to 24 GHz and even for off-normal incidence up to 60°.
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关键词
Metasurface,reflectarray,antenna array,beam scanning,high gain antennas
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