Optimizing a Star-Octagonal Microstrip Patch Antenna for 5G: Design and CST Simulation ApproachEsraa Bashayreh, Shahnaz Alkhalil, Eman Abdelhafez and Bader AlafasMATEC Web Conf., 411 (2025) 01006DOI: https://doi.org/10.1051/matecconf/202541101006