Anisotropic Metasurface for High-Gain Radiation and Low RCS by Spoof Surface Plasmon Polariton

In this work, an anisotropic metasurface (MS) is proposed for independent wave manipulation of radiation and scattering, which realizes high gain radiation and low radar cross section (RCS) by the excitation of spoof surface plasmon polariton (SSPP). The presented MS consists of anisotropic unit cells, which exhibit reflected mode and transmitted mode for x and y polarization, respectively. Besides, x-polarized reflection phase and y-polarized transmission phase can be independently changed in a wide range by varying structural parameters of the unit cell. By integrating with a conventional microstrip antenna, the proposed MS realizes y-polarized high-gain radiation of 15.3 dB, gain enhancement of 8.84 dB, and RCS reduction of more than 10 dB from 22 to 26GHz by the excited SSPPs in the simulation.