Abstract
A novel non-planar coding metasurface optimized by discrete particle swarm algorithm (DPSO) is proposed in terms of the property of wideband radar cross-section (RCS) and diffuse scattering. The design consists of two unit cells, “0” and “1”, which have a 180° ± 37° phase difference for phase interference cancellation. The 10 dB monostatic RCS reduction frequency range of the metasurface is from 6.4 to 29.6 GHz, and its bandwidth ratio is 4.62:1, under normal incidence of the two polarizations. Compared to the planar surface, the non-planar surface has a greater bandwidth with respect to the monostatic and bistatic RCS reduction. The results declare its properties of ultra-wideband, angle insensitivity, and polarization insensitivity. Finally, the theoretical analysis, simulation, and experimental results match perfectly, indicating that the metasurface can be used in the RCS reduction or other microwave applications with wider RCS reduction and diffuse scattering.
Highlights
With the rapid development of modern microwave radio frequency and detection technology, it is urgent to efficiently combat system detection and tracking
A novel non-planar coding metamaterial based on two different circle ring models is proposed, to create an ultra-wideband radar cross-section (RCS) reduction metasurface, and it shows the property of perfect polarization and angle insensitivity in the simulation and experiment
The optimal metasurface has a greater bandwidth of the monostatic RCS reduction, compared to the checkerboard surface, and divides the incident EM waves into more energy side lobes than four beams of the checkerboard surface
Summary
With the rapid development of modern microwave radio frequency and detection technology, it is urgent to efficiently combat system detection and tracking. Some excellent results are obtained, its bandwidth is limited by the AMC bandwidth To overcome this drawback, a checkerboard arrangement structure, using AMC technology, is applied to realize broadband RCS reduction, and its 10 dB monostatic RCS reduction bandwidth takes up 40% of the total operating frequency [12]. A novel non-planar coding metamaterial based on two different circle ring models is proposed, to create an ultra-wideband RCS reduction metasurface, and it shows the property of perfect polarization and angle insensitivity in the simulation and experiment. The optimal metasurface has a greater bandwidth of the monostatic RCS reduction, compared to the checkerboard surface, and divides the incident EM waves into more energy side lobes than four beams of the checkerboard surface
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