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This article presents a broadband dual-polarized antenna for the 5G wireless communication technology. A ring resonator is chosen with the purpose of enhancing the axial ratio (AR) and impedance bandwidth. Partial ground plane is chosen with a slot placed beneath the feedline. The dimensions of the antenna are 50 mm × 50 mm × 1.6 mm, and it is fabricated on a dielectric substrate made of FR4 material. The variation of antenna polarization is achieved through the function of PIN diode. When the diode is in the ON state, the antenna functions as a wideband antenna that exhibits right hand circular polarization (RHCP). The frequency range covered by this system spans from 4.5 GHz to 7.5 GHz. Conversely, it provides linear polarization (LP) within a frequency range that spans from 4.3 GHz to 5.3 GHz. The metrics of the prototype antenna are measured and tested. The CST full wave simulator is utilized for conducting simulations.
Sathishkumar et al. (Sun,) studied this question.