Characteristic impedance of nonradiative dielectric waveguide and its application

  • Lanfen Qi
  • Mingli Zhu
  • Hong Ma


In this paper a formula for determining the characteristic impedance of the nonradiative dielectric waveguide (NRD-guide) is presented. The numerical results are obtained, which are very useful for designing NRD waveguide components, such as impedance transformers, filters, branch-line hybrids, and active circuits. As a practical example for applying the formula, a 3 dB brainched NRD-guide directional coupler was designed and fabricated. The experiments show good consistency with the theory.


Coupler Directional Coupler Characteristic Impedance Good Consistency Active Circuit 
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Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • Lanfen Qi
    • 1
  • Mingli Zhu
    • 1
  • Hong Ma
    • 1
  1. 1.Department of Electronics and Information EngineeringHuazhong University of Science and TechnologyHubeiPeople's Republic of China

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