Mimo Antenna Design For Frequency Ultra Wideband Work With High Isolation

Abstract

Abstract— MIMO UWB antenna is one of the main technologies for wireless communication that has a high capacity and data rate. One significant advantage of MIMO (Multiple Input Multiple Output) combined with UWB (Ultra Wideband) is its ability to reject interference, effectively canceling out dominant and unwanted wavefronts that affect antenna performance. Therefore, designing a MIMO UWB antenna system that has improved isolation between ports is a challenge for the authors. In this research, it was designed by modifying a UWB MIMO antenna using FR-4 Epoxy as the substrate. FR-4 Epoxy is characterized by a dielectric constant (εr) of 4.4, a loss tangent of 0.035, and a thickness of 1 mm. The resulting antenna achieved a working frequency range of 2.3-11 GHz, making it suitable for Ultra Wideband (UWB) communication applications. Notably, the antenna demonstrated enhanced isolation between the two ports, with isolation levels of -34.77 dB in the lower band and -34.917 dB in the higher band. These results indicate significant improvements in minimizing interference and enhancing signal quality, positioning the modified UWB MIMO antenna as a promising solution for high-performance wireless communication systems. The research findings highlight the potential of using FR-4 Epoxy as a substrate to achieve superior isolation and performance in MIMO UWB antenna systems.