Abstract—Besides the evolution of wireless communications and their across-the-board utilise due to the many advantages they provide, on other hand, microstrip antennas have been popular since ancient years. These antennas are characterized by ease of design, low cost and small size, in addition to their ability to integrate and embed with most portable applications. Despite the many benefits mentioned, these antennas suffer from many disadvantages of poor gain, narrow bandwidth, and low efficiency. In this article, a rectangular Microstrip antenna (MPA) is designed, simulated, and analysed based on the finite internal technique that is supported by the Computer Simulation Technology (CST) antenna simulation software for the 5G applications of the 28 GHz band. In order to improve the proposed MPA performance, the Frequency Selective surfaces (FSSs) are introduced. Whereas the proposed MPA is situated between two FSSs superstrates, the upper one acts as a passive bandpass filter and the lower acts as a passive bandstop filter reflecting the leakage radiation from the ground plane of the MPA.