Design of A Compact Sequentially-Fed Metasurface-Based Patch Antenna with Wide Bandwidth And Circularly Polarized Operation

This paper introduces a design of wideband circularly polarized microstrip patch antenna that has compact dimensions. To achieve broadband and circular polarization properties, the proposed antenna employs sequential-phase (SP) feeding networks and 4 arrays of 2 x 2 unit-cell metasurface. The overall sizes of the proposed design are 1.02 λ0 x 1.02 λ0 x 0.05 λ0, in which λ0 is the free space wavelength at the center frequency of 5.0 GHz. Simulation results indicate that the impedance and axial ratio bandwidths of the SP-fed MS-based antenna are 27.6% and 22%, respectively. In addition, the proposed design produces a high peak gain of 10.9 dBi. In comparison with the related works, the antenna in this paper offers good performance with relatively wide CP operation bandwidth and high gain while maintaining a fairly compact dimensions.