A compact UWB MIMO antenna with neutralization line for WLAN/ISM/mobile applications

A novel design of 2 × 2 multiple-input-multiple-output (MIMO) antenna is reported for ultra-wideband applications. The neutralization line is implemented to minimize the mutual coupling between the radiating patches. The overall dimension of the designed antenna is 21 × 34 × 1.6 mm3. This antenna covers the measured bandwidth of 95.0% (3.52-9.89 GHz) with better isolation (≤−22 dB) over the entire operating frequency band. The measured gain varies from 3.08 to 5.12 dBi over the entire band. The various antenna parameters such as S-parameters, gain, efficiency, envelope correlation coefficient, mean effective gain, channel capacity loss, total active reflection coefficient, and radiation patterns are calculated and corresponding results are validated with the measured results.