This letter presents a novel design for a 3-D-printed circular waveguide dual-mode (CWDM) filter with a modified cavity shape. The modification leads to a wide spurious-free stopband, which is highly desirable for channel separation in waveguide contiguous output multiplexers (OMUXs) in satellite communication systems. The new resonant cavity design is a result of applying shape deformation to a basic circular cavity in order to move away and suppress parasitic modes. A fourth-order Ku-band channel filter with two transmission zeros (TZs) is designed, fabricated by additive manufacturing (AM) in one piece and measured. In comparison with the state-of-the-art design of a stepped CWDM filter, an improvement of approximately 35% wider spurious-free range is achieved.
Authors
- mgr inż. Michał Baranowski link open in new tab ,
- dr. inż. Łukasz Balewski,
- dr hab. inż. Adam Lamęcki link open in new tab ,
- prof. dr hab. inż. Michał Mrozowski link open in new tab ,
- Jaione Galdeano
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1109/lmwc.2022.3193722
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2022
