he present paper describes the study and design of a Substrate Integrated Waveguide (SIW) Leaky Wave Antenna (LWA) that has a fixed frequency beam steering and is intended to be fabricated with microelectronic processes using polymers layers and metal deposition. The antenna is designed to operate between 58 GHz and 70 GHz, enabling MIMO communications. The radiation pattern of the antenna is reconfigurable using diodes connected to the capacitive gaps of Complementary Electric LC resonator (cELC) unit cells. The antenna is capable of scanning a beam range of 120° (-60° to 60°) and has a peak directivity of 9.13 dBi at 70 GHz, with a variation of less than 2 dB. The goal of the study is to design an integrated reconfigurable antenna.