## Synthesis and design of in-line N-order filters with N real transmission zeros by means of extracted poles implemented in low-cost rectangular H-plane waveguide

- J.R. Montejo-Garai, J.A. Ruiz-Cruz, J.M. Rebollar, M.J. Padilla-Cruz, A. Onoro-Navarro, I. Hidalgo-Carpintero
- IEEE Transactions on Microwave Theory and…
- 2005