Reconfigurable antennas represent an important component in the field of intelligent and adaptive systems, attracting particular attention from the research community. Due to their advantages, they allow multiple frequency bands to be configured within the same antenna structure. In this research paper, we have introduced an innovative and compact microstrip patch antenna with reconfigurable capabilities to operate in the sub-6 GHz bands, at 2.45 GHz for Wi-Fi, and at 3.5 GHz for 5G. We simulated our antenna design using a FR4 epoxy substrate characterized by a relative permittivity of 4.4, a loss tangent of 0.02, and a thickness of 1.6 mm. In order to reach multiple frequency bands, the design is based on the use of two PIN diode switches, making the proposed antenna suitable for a wide range of wireless communication systems and devices.