Circularly Polarized MTS Based Antenna Design for C Band Applications

A new broadband metasurface (MTS) circularly polarized (CP) patch array utilizing a sequential-phase feeding network is presented. In this study, the MTS method is used to increase the 3-dB axial ratio (AR) and impedance bandwidths. The prototype of the proposed array has been fabricated to validate designed parameters. The measured S11<; -10dB is 2.1 GHz (4.5-6.6 GHz), and the measured 3-dB AR bandwidth is 1.3 GHz (4.9-6.2 GHz). The measured peak gain is about 16.4dBic and the gain variation is less than 3 dB within the AR bandwidth.