The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design and Implementation of 3-Dimensional Laminated Dielectric Ceramic Filter in Waveguide Using a DWFD Program

DWFD 프로그램을 이용한 3차원 적층 유전체 세라믹 도파관 필터의 설계 및 제작

  • Received : 2013.03.22
  • Accepted : 2013.04.16
  • Published : 2013.05.31
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Abstract

The program for dielectric ceramic waveguide filter was developed based on the direct coupled filter of ${\lambda}/2$ step impedance prototype. This developed program was called DWFD(Direct coupled Waveguide Filter Design). The filter was designed by 3-dimensional laminated type to reduce the size at the 1 GHz. S scattering matrix for this filter was calculated using the DWFD program. The width of inductive irises for laminated filter was computed by HFSS simulation tool. This waveguide filter was designed by 8 poles with bandwidth 25 MHz at the center frequency 881.5 MHz. By using a dielectric constant 35.4 and laminated type, the size of filter was reduced with width 50 mm and height 48 mm rapidly. We can see that the measured results agree well with the HFSS simulation result. Finally, this paper is shown that the design and implementation of waveguide filters can be presented by using DWFD program simply.

유전체 세라믹 도파관 필터를 설계할 수 있는 DWFD 프로그램이 ${\lambda}/2$ 스텝 임피던스 타입의 직접 결합 도파관 필터 이론을 사용하여 개발되었다. 1 GHz 대역의 필터 크기를 줄이기 위하여 3차원 적층 형태로 설계하였다. 이에 필요한 S-매개변수값은 개발한 프로그램을 이용하였다. 적층형에 필요한 인덕티브 아이리스들의 치수는 HFSS 시뮬레이션 도구를 사용하였다. 필터는 중심 주파수 881.5 MHz에서 25 MHz 대역폭을 가지는 8단으로 설계하였다. 설계된 도파관 필터는 유전율 35.4의 세라믹을 사용하여 크기를 폭 50 mm에 높이 48 mm로 제작하였다. 측정한 주파수 반응은 시뮬레이션 결과와 일치하였다. 개발한 시뮬레이션 프로그램을 통하여 원하는 형태의 유전체 세라믹 도파관 필터를 쉽고 효율적으로 설계, 제작이 가능하도록 하였다.

Keywords

References

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