Broadband Circularly Polarized CPW-Fed Inverted-L Grounded Strips and SRR Loaded Square Slot Antenna for Wi-Fi/WiMAX/5G Applications

摘要

A coplanar waveguide-fed inverted-L grounded strips and a square split-ring resonator (SRR) loaded circularly polarized square slot antenna is presented. The broadband circular polarization is achieved mainly by incorporating asymmetrical square SRR parasitically and a pair of inverted-L grounded strips on square slot antenna due to excitation of equal field components and 90° phase difference between them. The embedded strips and a square SRR on square slot antenna is also supported to enhance the impedance bandwidth. The antenna exhibits a wide 3-dB axial ratio bandwidth (ARBW) of 42.62% (1.3 GHz, 2.40-3.70 GHz) and impedance bandwidth (丨S_(11)丨 < -10 dB) of 127.08% (7.46 GHz, 2.14-9.60 GHz), yielding this antenna can be used for Wi-Fi, WiMAX, and 5G applications.