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A Circular Waveguide Dual-Mode Filter with Improved Out-of-Band Performance for Satellite Communication Systems
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  • Michal Baranowski ,
  • Łukasz Balewski ,
  • Adam Lamecki ,
  • Michal Mrozowski ,
  • Jaione Galdeano
Michal Baranowski
Gdańsk University of Technology, Gdańsk University of Technology

Corresponding Author:[email protected]

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Łukasz Balewski
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Adam Lamecki
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Michal Mrozowski
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Jaione Galdeano
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This letter presents a novel design for a 3D-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 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
Dec 2022Published in IEEE Microwave and Wireless Components Letters volume 32 issue 12 on pages 1403-1406. 10.1109/LMWC.2022.3193722