Journal of electromagnetic engineering and science

  • 제6권1호
  • /
  • Pages.1-9
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  • 2006
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  • 2671-7255(pISSN)
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  • 2671-7263(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
권호 표지

Piezo-controlled Dielectric Phase Shifter

  • Jeong Moon-Gi (Dept. of Materials Science and Engineering, Pohang Univ. of Science & Technology (POSTECH)) ;
  • Kim Beom-Jin (Dept. of Materials Science and Engineering, Pohang Univ. of Science & Technology (POSTECH)) ;
  • Kazmirenko Victor (Dept. of Microelectronics, National Technical Univ. of Ukraine) ;
  • Poplavko Yuriy (Dept. of Microelectronics, National Technical Univ. of Ukraine) ;
  • Prokopenko Yuriy (Dept. of Microelectronics, National Technical Univ. of Ukraine) ;
  • Baik Sung-Gi (Dept. of Materials Science and Engineering, Pohang Univ. of Science & Technology (POSTECH))
  • 발행 : 2006.03.01
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초록

A sandwich structure of dielectric material and air gap inside a rectangular waveguide is proposed as a fast electrically tunable low-loss phase shifter. As the dielectric material is shifted up and down by piezoelectric actuator and, thereby, the thickness of air gap is changed, the effective dielectric constant of the sandwich structure is varied. Phase shifters based on the sandwich structure with different dielectric materials showed phase shift of $20{\sim}200^{\circ}/cm$ at X-band as the thickness of air gap varied up to $30{\mu}m$. The idea can be extended toward low-loss millimeter wave phase shifters since modem microwave ceramics have been developed to show very low dielectric loss$(tan\;{\delta}{\sim}10^{-4})$.

키워드

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