U. AHMED; S. AFRIDI; SANAULLAH; M. R. ANJUM; A. A. JAMALI. Ultra-Improved Stop band Rejection of an Ceramic Filter Using Ridge Resonators. Sindh University Research Journal - SURJ (Science Series), [S. l.], v. 52, n. 1, 2020. Disponível em: https://sujo.usindh.edu.pk/index.php/SURJ/article/view/593. Acesso em: 7 jun. 2026.