A THREE-STAGE SLOTTED HEXAGRAM MICROSTRIP PATCH ANTENNA DESIGN AND S-PARAMETER ANALYSIS FOR K-BAND AND 5G N258 APPLICATIONS. International Journal of Engineering Research and Science & Technology, [S. l.], v. 22, n. 4, p. 417–422, 2026. DOI: 10.62643/ijerst.2026.v22.n4.4834. Disponível em: https://ijerst.org/index.php/ijerst/article/view/4834. Acesso em: 9 nov. 2026.