Circularly Polarized Two Port Flexible Antenna for WLAN and Wi-Fi-6 Applications

In this paper, a circular polarized and two-port flexible antenna is designed for Wi-Fi-6 and WLAN applications. Inverted C-shaped radiators with modified L-shaped feed are used to increase the electric length of the antenna. Two vertical stubs are attached to the ground and manipulate the surface current for CP behavior in the higher band. A modified T-shaped stub between antenna elements is used to enhance the isolation and circular polarization. The T-shaped stub enhances the electric length of the ground as well as divert the surface current, increasing the isolation and improving the CP behavior. The impedance bandwidth of flexible antenna ranges from 5.15 GHz to 6.8 GHz and 70% 3 dB axial ratio from 5.65 GHz to 6.8 GHz. The minimum isolation of the two-port antenna is -16.3 dB, and ECC is below 0.001, which validates the satisfactory operation of the MIMO antenna.