A Circularly Polarized Microstrip Antenna Using Metasurface for 5G Applications

Abstract

5G technology has many advantages such as low latency, high data rate and energy-efficient services at low cost. The mid-band and millimeter-wave frequencies that are used have limitations in transmitting distance. This research will propose a circular polarization microstrip antenna for 5G applications. The proposed antenna work at the frequency of 3.5 GHz. The antenna was made using two substrates with a dielectric constant of 2.17 and a thickness of 1.6 mm for each substrate. The top and bottom of the substrate are the metasurface and radiation patch, respectively. The finite element method was used to optimize the design. Circular polarization is generated using a 4×4 metasurface with a modified square shape. The axial ratio bandwidth can increase with the shifting of feeding position. The measurement show that the impedance bandwidth and axial ratio bandwidth are 7.86% (275 MHz) and 0.95% (34 MHz), respectively. The measured of gain is 9.82 dBic at the frequency of 3.5 GHz. The result showed that the microstrip antenna using metasurface can be used for 5G applications.