Improvement of Stopband Property of Parallel Coupled Microstrip Bandpass Filters by Use of Open Stubs . International Journal of Information and Electronics Engineering, [S. l.], v. 3, n. 1, p. 68–71, 2013. Disponível em: https://ijiee.org/index.php/ijiee/article/view/627. Acesso em: 20 apr. 2026.