Designing novel broadband microstrip antenna by using HFSS

A novel broadband microstrip antenna was designed by HFSS software in the study. The patch is on air substrate and excited by a coaxial probe which is stretched from the top of ridge-shaped ground plate, thus the probe inductance is reduced and the broadband operation is obtained. Its measured impedance bandwidth VSWR ≤ 2:1 reaches 66%, covering 2 GHz-4 GHz. Moreover, from this study it is indicated that the proposed antenna has wide beam characteristics. The process and theories of the design by using HFSS are shown in the study. By comparing the simulated and experimented results, a good identity is obtained which demonstrates the reliability and high efficiency of Ansoft HFSS software.