A dual band monopole resonator antenna is proposed in this paper. The antenna works at two different bands with central frequencies of 2.4 GHz and 5 GHz. To cover the two bands of WLAN (i.e., lower band of 2.4 GHz and upper bands of 5 GHz), two monopoles are used: one working for the lower band and the other working for the higher band. However, there is a limit in most of these antennas to obtain the wideband characteristic especially at the 5-GHz band for WLAN applications, when operating simultaneously at 2.4 GHz. The proposed antenna achieves a good bandwidth at the upper frequency, the data rate has been increased with the help of MIMO configuration. The simulated results are giving a very good return loss of -22.14 dB for 2.4 GHz band and -35.43 dB for 5.0 GHz for the single antenna. © 2020 IEEE.