Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
권호 표지
DOI QR코드

DOI QR Code

Design of Lowpass Filter With the Wide Stopband Characteristics Using Microstrip Line

마이크로스트립 선로를 이용한 광대역 차단특성을 가지는 저역통과 필터 설계

  • Choi Dong-Muk (Research Institute of Industry Technology, National Korea Maritime University) ;
  • Shim Joon-Hwan (Department of Radio and Information Communication Engineering, National Korea Maritime University) ;
  • Jeon Joongn-Sung (Research Institute of Industry Technology, National Korea Maritime University) ;
  • Kim Dong-Il (Department of Radio and Information Communication Engineering, National Korea Maritime University)
  • 최동묵 (한국해양대학교 부설 산업기술연구소) ;
  • 심준환 (한국해양대학교 전파.정보통신공학부) ;
  • 전중성 (한국해양대학교 부설 산업기술연구소) ;
  • 김동일 (한국해양대학교 전파.정보통신공학부)
  • Published : 2006.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we designed and fabricated the lowpass filter with the wide stopband characteristics using microp- strip line. Adding the $\lambda_g/4$ open stub at the input and output ports, we developed the L-C ladder type lowpass filter using the open stub which has wide stopband characteristics. In order to reduce the entire size qf this filter, the high impedance microstrip lines were made with the meander structure. The lowpass filter was fabricated with the cutoff frequency 2.3 GHz and its measured frequency responses agree well with the simulation results.

본 논문에서는 광 대역 저지대역특성을 가지는 저역통과필터를 마이크로스트립 선로를 이용하여 설계 및 제작하였다. 개방회로 스터브를 이용한 L-C ladder형 저역통과 필터의 입 출력단에 길이가 $\lambda_g/4$인 개방 스터브를 부가함으로써, 광대역 차단특성을 가지는 필터를 개발하였다. 필터의 전체길이를 줄이기 위해 고 임피던스 마이크로스트럼 라인을 미앤더(meander) 구조로 제작하였다. 제작된 필터는 차단주파수가 2.3 GHz인 저역통과필터였고, 측정된 결과는 전산모의실험에서 예측된 값들과 잘 일치함을 알 수 있었다.

Keywords

References

  1. Bahl, I. and Bhartia, P.(2003), "Microwave Solid State Circuit Design", John Wiley & Sons, New Jersey.
  2. Garg. R, Bahl, I. J.(1978), "Microstrip Discontinuities," Int. J Electron., vol. 45, pp. 81-87. https://doi.org/10.1080/00207217808900883
  3. Hong, J. S. and Lancaster, M. J.(2000), "Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies", IEEE Trans. Microw. Theory Tech., vol. MTT-48, no. 7, pp. 1098-1107.
  4. Hong, J. S. and Lancaster, M. J.(2001), "Microwave Filters for RF/Microwave Applications", John Wiley & Sons, New York.
  5. Hong, J. S. and Lancaster, M. J.(2002), "Recent progress in planar microwave filters," International Conference on Microwave and Milimeter Wave Technology Proceedings, pp. 1134-1137.
  6. Levy, R.(1976), "Filters with single transmission zeros at real and imaginary frequencies," IEEE Trans. Microw. Theory Tech., vol. MTT-24, no 4, pp. 172-181.
  7. Matthaei, G. L., Young, L. and T Jones, E. M. (1964), "Microwave Filters, Impedance-Matching Networks, and Coupling Structures", McGraw-Hill, New York.
  8. Sonnet Suite, Ver. 8.0(2002), Sonnet Software, Liverpool, NY