Design a CPW-Fed Circular Polarization Printed Antenna for 5G Sub-Band Applications

In this paper, a coplanar waveguide-fed (CPW) printed antenna with circular polarization is suggested for the sub-6 GHz 5th generation spectrum. The proposed antenna is characterized by its single metallic layer being printed on one side of an FR4 substrate dielectric material with epsilon value ($\varepsilon_{r}$) of 4.4 and tangent loss (tan$\delta$) of 0.02. The total size of the suggested antenna is 30$\times$ 23.2$\times $ 1 mm
³
. The results show a wide-impedance bandwidth starts at 3.9GHz and going up to more than 8GHz with an S
11
value smaller than -10dB (S
11
$\le$10 dB) and the axial ratio bandwidth (ARBW) varying from 4GHz to 7.38GHz with an axial ratio(AR) value smaller than -3dB. The gain varies from 2.8dB up to 4.18dB in the entire band. This antenna covers all the sub-6GHz frequency bands of the fifth generation (5 G) applications. The HFSS software is used to design and simulate the suggested antenna and the CST.Studio is used to validate the results.