Wideband dual‐polarized antenna with high isolation for full‐duplex application

Abstract

AbstractA wideband dual‐polarized antenna with high isolation is proposed for full‐duplex applications. It consists of a radiating patch, two E‐shaped strips, a parasitic patch, a metal reflector, and a 180° power divider. Two hook‐shaped strips and a pair of E‐shaped strips are used to excite the radiating patch realize ±45° polarization. The impedance matching is significantly enhanced by the attendance of the parasitic patch and 180° power divider. Multiple decoupling techniques, including polarization diversity, radiation mechanism diversity, shunt effect of a shorting pin, and differential feeding, are simultaneously used to achieve high isolation. An antenna prototype is measured with an impedance bandwidth of 52.2% (1.7–2.9 GHz) for |S11|, |S22| < −10 dB, and high isolation of better than 55 dB. These characteristics make it a promising candidate for in‐band full‐duplex wireless communication systems.