S, R.; M, A. .; R, B. R. .; C, M. . Compact Ultra-Wide-Stopband Microwave Bandpass Filter with Multiple Transmission Zeros by Integrating an L-Shaped Bandpass Filter and a Stepped Impedance Lowpass Filter. IEEE Latin America Transactions, [S. l.], v. 23, n. 5, p. 437–443, 2025. Disponível em: https://latamt.ieeer9.org/index.php/transactions/article/view/9327. Acesso em: 25 apr. 2026.