Abstract
A conventional Fabry-Perot (F-P) antenna combined with a coding metasurface was presented, which could realize low-RCS and high-gain simultaneously. The coding particle consists of two layers of square metallic patches printed on both sides of a dielectric substrate. The bottom metallic patch helps form a partially reflecting surface (PRS) for the F-P antenna, while the upper metallic patch is utilized to reduce the RCS of the F-P antenna by redirecting electromagnetic energies in all directions. Based on the specially-designed metasurface, a good RCS reduction without degrading the radiation performance of the F-P antenna is achieved. Both simulated and experimental results demonstrate the excellent performance of the proposed antenna, with a peak measured gain of 19.8 dBi and a significant RCS reduction in the frequency range of 8–12 GHz.
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