Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Phase shitter design and implementation of DGS using ferroelectric materials

강유전체를 이용한 DGS 구조의 위상 변위기 설계 및 구현

  • Kim, Young-Ju (School of Electrical Engineering, Kookmin University) ;
  • Park, Jun-Seok (School of Electrical Engineering, Kookmin University) ;
  • Kim, Young-Tae (School of Electrical and Electronics Engineering, Soon Chun Hyang Univ) ;
  • Kim, Sun-Hyeong (School of Electrical and Electronics Engineering, Soon Chun Hyang Univ) ;
  • Kim, Hyeong-Seok (School of Electrical and Electronics Engineering, Chung Ang Univ)
  • 김영주 (국민대학교 전기전자공학과) ;
  • 박준석 (국민대학교 전기전자공학과) ;
  • 김영태 (순천향대학교 전기전자공학부) ;
  • 김선형 (순천향대학교 전기전자공학부) ;
  • 김형석 (중앙대학교 전자공학과)
  • Published : 2004.07.14
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Abstract

In order to obtain a low-loss ferroelectric phase shifter, the reflection-type phase shifter with ferroelectric defected ground structure (DGS) resonators has been designed in this paper. The proposed phase shifter is consist of a 3-dB $90^{\circ}$ branch-line hybrid coupler and terminated reflective circuit with tunable ferroelectric DGS resonator. The ferroelectric DGS unit structure can provide high Q resonator characteristic at high frequencies. The design parameters of equivalent circuit for the tunable DGS resonator are derived by using simple circuit analysis method and three-dimensional full wave finite element method. The fabricated phase shifter has an insertion loss of better than 3.4dB at 13.5GHz.

Keywords