NONE 20260403093341482 wseas/wseas content-registration-form+ja@crossref.org content-registration-form WSEAS TRANSACTIONS ON COMMUNICATIONS 1109-2742 2224-2864 Mario Reyes-Ayala Department of Electronics, Metropolitan Autonomous University, San Pablo 420, Col. Nueva el Rosario, Azcapotzalco (ZIP 02128), Mexico City, MEXICO Edgar Alejandro Andrade-Gonzalez Department of Electronics, Metropolitan Autonomous University, San Pablo 420, Col. Nueva el Rosario, Azcapotzalco (ZIP 02128), Mexico City, MEXICO Gerardo Salgado-Guzman Department of Electronics, Metropolitan Autonomous University, San Pablo 420, Col. Nueva el Rosario, Azcapotzalco (ZIP 02128), Mexico City, MEXICO Jose Ignacio Vega-Luna Department of Electronics, Metropolitan Autonomous University, San Pablo 420, Col. Nueva el Rosario, Azcapotzalco (ZIP 02128), Mexico City, MEXICO Sandra Chavez-Sanchez Department of Energy, Metropolitan Autonomous University, San Pablo 420, Col. Nueva el Rosario, Azcapotzalco (ZIP 02128), Mexico City, MEXICO Hilario Terres-Peña Department of Energy, Metropolitan Autonomous University, San Pablo 420, Col. Nueva el Rosario, Azcapotzalco (ZIP 02128), Mexico City, MEXICO Rene Rodriguez-Rivera Department of Energy, Metropolitan Autonomous University, San Pablo 420, Col. Nueva el Rosario, Azcapotzalco (ZIP 02128), Mexico City, MEXICO The goal of this paper is to propose a rectangular microstrip antenna with two frequency bands is carried out. The rectangular patch has a square slot to obtain the second band. The antenna has been designed for laboratory subjects in undergraduate courses in RF theory and applications. The antenna was modeled, simulated, and optimized using High Frequency Structure Simulation (HFSS). Additionally, this work includes the analysis of the ground layer size, which modifies the two operating frequencies and corresponding bandwidths. 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