Wideband CPW-fed oval-shaped monopole antenna for Wi-Fi 5 and Wi-Fi 6 applications

Abstract

A wideband coplanar waveguide (CPW) fed monopole antenna designed for Wi-Fi 5 and Wi-Fi 6 applications is proposed. The proposed antenna (main radiator) has a designed footprint of only 20 × 8.7 × 0.4mm3, which is composed of an oval-shaped ring radiator with three concentric rings and a double-T structure loaded with a J-shaped slot. The main novelty of this work is that the measured wideband operation of 34.5% (5.15–7.29 GHz) is contributed by only a single resonance at 6.2 GHz, conforming to the bandwidth requirement of Wi-Fi 5 (5.15–5.85 GHz) and Wi-Fi 6 (5.925–7.125 GHz). Furthermore, the proposed antenna also exhibits good radiation characteristics, including a gain around 2.25 dBi, a radiation efficiency above 80%, a total efficiency above 70%, and omnidirectional radiation patterns with a low magnitude of cross polarization throughout the bands of interest.