Estimation of polarization diversity in CPW fed compact dual band dual sense antenna with horn slot structure: 5G and WLAN applications

A compact horn-slotted coplanar waveguide (CPW) fed dual-band dual-sense circular polarization antenna is proposed. The antenna resonates with right-handed circular polarization in the lower frequency band and left-handed circular polarization in the upper frequency band. It has a novel horn-shaped slot and a CPW-fed inverted L-shaped active patch. The inverted L-shaped patch with a slanted stub at its right side provides dual-band dual-sense circular polarization characteristics. It has a compact geometry of 0.27 λ₀ × 0.27 λ₀ × 0.017 λ₀, with wideband circular polarization characteristics extending from 2.92 to 3.67 GHz (22.82% of ARBW) and 5.2–5.73 GHz (9.5% of ARBW), thereby covering 5G and WLAN applications, respectively.