Semi-Ring Patch Array Antenna for High Gain 28 GHz Applications

A patch array antenna design for millimeter-wave 28 GHz applications is presented in this article. The front-side of the proposed design is comprised of a 1×2 array of semi-ring radiating elements excited using a conventional T-junction corporate feeding network, while the back-side consists of a full ground plane. The designed patch array demonstrates a wide impedance bandwidth (1.75 GHz), ranging from 27.5 GHz to 29.25 GHz. Furthermore, a peak gain of ≥9.5 dBi with an antenna efficiency of >80% is observed within the operating bandwidth.