A U-Band Rectangular Waveguide-to-Coplanar Waveguide Transition Using Metal Ridge

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This paper presents a rectangular waveguide-to-coplanar waveguide (CPW) transition using metal ridge at U-band (40–60 GHz). By using an in-house printed circuit board (PCB) technology, a CPW with gap terminations is designed on a Rogers 6002 substrate and its performance is compared with a conventional CPW. As the critical part of the transition, a metal ridge is realized inside the rectangular waveguide and applied to the CPW from top forming an orthogonal structure. The proposed rectangular waveguide-to-CPW transition using metal ridge is designed, fabricated, and measured in a back-to-back configuration. The return loss remains better than 12 dB at U-band with an associated insertion loss of 2.6 dB. Thus, each fabricated transition introduces less than 1.3 dB insertion loss.
Original languageEnglish
Title of host publicationProceedings of 2020 50th European Microwave Conference 
Publication date2021
ISBN (Electronic)978-1-7281-7039-8
Publication statusPublished - 2021
Event50th European Microwave Conference - Royal Dutch Jaarbeurs Exhibition & Convention Centre, Utrecht, Netherlands
Duration: 12 Jan 202114 Jan 2021


Conference50th European Microwave Conference
LocationRoyal Dutch Jaarbeurs Exhibition & Convention Centre

Bibliographical note



  • Integrated circuit packaging
  • Millimeter wave devices
  • Millimeter wave propagation
  • Transmission lines

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