Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Modeling of Capacitive Coplanar Waveguide Discontinuities Characterized with a Resonance Method

공진 주파수 측정방법을 이용한 Coplanar Waveguide 용량성 불연속 구조 설계

  • Kim, Dong-Young (Department of Electronic Engineering, College of Engineering, Sogang University) ;
  • Jee, Yong (Department of Electronic Engineering, College of Engineering, Sogang University)
  • 김동영 (서강대학교, 공과대학, 전자공학과) ;
  • 지용 (서강대학교, 공과대학, 전자공학과)
  • Published : 2001.06.01
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Abstract

A coplanar waveguide(CPW) on a dielectric substrate consists of a center strip conductor with semi-infinite ground planes on either side. This type of waveguide offers several advantages over microstrip line. It facilitates easy shunt as well as series mounting of active and passive devices. It eliminates the need for wraparound and via holes, and it has a low radiation loss. These, as well as several other advantages, make CPW ideally suited for microwave integrated circuit applications. However, very little information is available in the literature on models for CPW discontinuities. This lack of sufficient discontinuity models for CPW has limited the application of CPW in microwave circuit design. We presented for the characteristics of coplanar waveguide open end capacitance and series gap capacitance. Measurements by utilizing the resonance method were made and the experimental data confirmed the validity of theories. The relationships between the CPW capacitances and the physical dimensions were studied.

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