Abstract:A multi band h shaped slot microstrip antenna has been proposed based on analyzing the conventional slot microstrip antenna. The proposed antenna has the features of multi band and miniaturization. The resonance frequency can be reduced and the bandwidth can be increased by being loaded a single shorted post and being slotted in the ground plate. The characteristics of the antenna have been simulated by using HFSS11.0 software based on the finite element method (FEM). The simulation results showed that the antenna operated at 2.38~2.79 GHz, 4.59~4.75 GHz and 5.12~5.90 GHz when the return loss S11 was less than -10 dB, the size reduced 62.43% compared to the general microstrip antenna, demonstrated the effectiveness of the design scheme. The antenna structure is simple and easily to be implemented, met the wireless LAN 802.11a/b/g/n mobile terminal antenna miniaturization and multi band requirements.