Design of Compact Triangle-Shaped MIMO Antenna with High Isolation for UWB Applications

For use in ultrawideband (UWB) applications, a small triangle-shaped monopole MIMO antenna is proposed in this article. The designed antenna is composed of two modified triangular monopoles with rectangular slots carved onto the ground plane. A partial ground plane is employed at the substrate's back side when using microstrip feeding, and it offers good impedance matching for desired UWB band applications. The designed antenna has a dimension of only 14 mm x 26 mm x 1.59 mm. The operating band of the antenna is 10.5 GHz (4.0 -14.5 GHz) and the isolation is below 17 dB. This UWB antenna's performance has been analyzed, taking into account the effect of varying the antenna's geometric parameters. Throughout the entire operating band, good impedance matching, acceptable radiation pattern, and radiation efficiency greater than 92 % are observed.