Polarization Reconfigurable Antenna for 5G Wireless Communication Systems On 3.5 GHz Frequency

One of the 5G key features in improving energy efficiency is suitable for cognitive radio technology. Cognitive radio has the ability in sensing the operation situation and providing a certain response regarding the sensing result. The operation situation of electromagnetic propagation allows multipath and depolarization of antenna due to many obstacles. In this paper, polarization reconfigurable antenna was proposed to support cognitive radio technology in 3.5 GHz 5G system. The antenna has capability for reconfigure between linear polarization, right-hand circular polarization (RHCP), and left-hand circular polarization (LHCP) manually to mitigate the polarization loss during propagation. The results show that antenna has good performance in the perspective of matching impedance and axial ratio. It is shown in simulation that the S11 less than -10 dB for RHCP and LHCP with axial ratio 1.762 dB and 1.811 dB respectively. Whereas for linear polarization, the S11 of 3.5 GHz more than -10 dB and has optimum value at 3.1 GHz with an axial ratio of 40 dB.