A study on gain and bandwidth enhancement of 4×4 planar array of X-shaped slot antenna within millimeter wave frequency band

Abstract

This paper introduces a newly designed X-shaped slot antenna with high gain and wideband characteristics for use in mm-wave frequency band. The X-shaped slot antenna serves as radiating elements of planar array configuration for high gain. The 4×4 configuration is investigated in this paper. According to simulation results, the 4×4 planar array exhibits a -9.7 dB impedance bandwidth within the range of 26.1-31 GHz and a maximum gain of 18.2 dBi. Furthermore, gain and bandwidth enhancement of the array antenna is studied. As the results, the antenna shows an impedance bandwidth within the range of 25.35-25.95 GHz, and 26.8-30.2 GHz. Within this band the antenna realized gain is ranging from 17.5-20 dBi.