Comments on “Compact UWB Monopole Antenna for Automotive Communications”

The equation for diversity gain (DG) for multiple-input–multiple-output (MIMO) antenna in the article authored by Alsath and Kanagasabai is incorrect. The correct equation for DG by employing MIMO antennas is provided in this article. The degradation factor (DF) in the DG due to envelope correlation coefficient (ECC) is also mentioned in this comment article.