Modular Hybrid Metasurface Broadband Multipolarized Antenna for 5G DSRC Applications

In this letter, a multipolarized reconfigurable metasurface (PRMS) antenna with dimensions of 0.67λ × 0.67λ × 0.07λ is proposed. The proposed antenna enables the realization of left-hand circular polarization (LHCP), right-hand circular polarization (RHCP), and linear polarization (LP) by rotating the orientation of the metasurface (MS) structure, while keeping the feed structure fixed. Unlike the conventional repeated periodic structure, the MS utilizes a modular hybrid design, which contains four hybrid radiation submodules, while the central repeated chamfered area serves as the feeding interface. The series/parallel mode resonant paths with frequency differences are constructed by hybrid units coupling of different modules, which can construct conditions for low/high-frequency circularly polarized (CP) waves, respectively. When operating in LHCP and RHCP, the antenna achieves improved 3 dB axial ratio bandwidths of 20.23% (5.02 GHz to 6.15 GHz) and 18.5% (5.09 GHz to 6.13 GHz), respectively. Additionally, the stacked 10 dB impedance bandwidth of the proposed antenna across the CP frequencies exceeds 40%, accompanied by a measured gain of over 6 dBic. Thus, the proposed antenna effectively covers the 5G NR n46 band (5.15 GHz to 5.925 GHz).