Design and Implementation of a 1 × 4 Bow-Tie Antenna Array Integrated with a Butler Matrix for Switched-Beam ISM-Band Applications. Indian Journal of Pure & Applied Physics (IJPAP), [S. l.], v. 64, n. 7, 2026. DOI: 10.56042/ijpap.v64i7.29976. Disponível em: https://or.niscpr.res.in/index.php/IJPAP/article/view/29976. Acesso em: 15 jul. 2026.