Annular slot based printed MIMO antenna system design

A 3-element printed MIMO antenna system operating in the 2.45 GHz band is presented. The antenna is made up of three annular slot antenna elements. The antenna shows good isolation characteristics between closely spaced antenna elements. A minimum measured isolation of 11 dB is found between its antenna elements. The antenna has a bandwidth of 100 MHz. It is evaluated for MIMO antenna performance matrices where it shows good performance.