A Broadband High Gain Microstrip Yagi Antenna Array for Mm-wave Communication Systems

Abstract

A broadband, high gain microstrip Yagi antenna operating at 28GHz and targeting on 5G applications is presented in this paper. The antenna is composed of a printed dipole with improved performance and three directors. Getting benefits from arc chamfering and bow tie structure, the antenna shows broadened bandwidth compared to conventional microstrip Yagi antennas. Next, an array which consists of eight linear arranged proposed antennas is designed and simulated. Fed by an unequal microstrip power divider, the array exhibits a fractional -10dB impedance bandwidth of 46.4% at 28GHz, a stable gain of higher than 15dBi and a low sidelobe level of -19.2dB in the operating frequency band.