• Title/Summary/Keyword: VIP(Vertically Installed Planar) Circuit

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A Study on Broadband Hybrid Design Using Vertically Installed Planar Circuit with Partially Removed Ground Plane (일부 접지면이 제거된 수직 장착 평면 회로를 이용한 광대역 하이브리드 설계에 관한 연구)

  • Kim In-Seon;Lee Cheol-Soo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.16 no.7 s.98
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    • pp.661-670
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    • 2005
  • In this paper, the microstrip $90^{\circ}$ hybrid to provide -3dB coupling and $90^{\circ}$ phase difference at broadband frequency range of 2 to 6 GHz is designed. This proposed hybrid is composed of 3-section. The two outside section are realized by symmetrical edge coupled lines, but on the other hand the middle section consists of VIP(Vertically Installed Planar) circuit. The ground part of VIP circuit is partially removed to get tight coupling, particularly. This hybrid is easy to realize due to microstrip structure and has good holing flexibility by taking advantage of VIP circuit as a control point of optimization. The proposed hybrid provide satisfactory performance as compared with simplicity of structure and fabrication first of all.