NIELSEN, Hans; ANDERSEN, Ingrid. Compact SIW-Based Multi-Mode Filters for High-Density PCB Integration. Journal of Engineering and Technology, [S. l.], v. 6, n. 1, p. 1−9, 2024. Disponível em: http://mzresearch.com/index.php/JET/article/view/138. Acesso em: 18 jul. 2025.