Modeling and Up-Gradation of Concentric Circular Shaped Patch Antenna to Array Antenna with the Improved Performance for 5G Millimeter- Wave Communication. Pakistan Journal of Engineering, Technology and Science, [S. l.], v. 13, n. 1, p. 121–133, 2025. DOI: 10.22555/pjets.v13i1.1286. Disponível em: https://journals.iobm.edu.pk/index.php/pjets/article/view/1286. Acesso em: 20 may. 2026.