Shared-Metasurface Antenna With Diverse Reflection, Radiation and Polarization Characteristics for Vehicular Communications

This paper presents a shared-metasurface antenna with frequency, directivity and polarization diversities for vehicular communications. The designed metasurface can be simultaneously used as the radiation source of a wideband metasurface antenna, the surface waveguide of a surface-wave antenna and the frequency selective surface (FSS) of a circularly-polarized (CP) array. By placing a printed dipole below the metasurface, the linearly-polarized (LP) broadside radiation in the frequency band of 3.65∼4.58 GHz is realized. Besides, surface waves are excited and supported within the metasurface. Dual quasi-endfire patterns are then generated at two edges from 5.70 to 5.96 GHz due to the discontinuousness. In addition, the broadside CP radiation performance can be realized from 19.45 to 21.85 GHz by placing a CP array below the printed dipole. The designed antenna is simulated and measured. Measured results indicate that the proposed shared-metasurface antenna can be simultaneously applied to the vehicular terrestrial 5G, vehicle-to-everything (V2X) and vehicle-to-satellite (V2S) communications.