A Wideband Dual-Polarized Antenna Designed for Antenna-in-Package (AiP)

The paper presents a low-profile wideband dual-polarized for Antenna-in-Package (AiP) system. The antenna consists of a middle patch surrounded by artificial magnetic conductor (AMC) structure. Compared to the conventional patch antenna, the operating frequency bandwidth is increased from 6% to 20.7%. The antenna has a maximum gain of 7.8 dBi with excellent gain flatness over the operating frequency range. The overall size is about $0.56 \lambda_{0} \times 0.56\lambda_{0}\times 0.077\lambda_{0}$ . Meanwhile, the $2\times 2$ antenna array has also been discussed.