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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지
DOI QR코드

DOI QR Code

A Design of the UWB Bandpass Filter with a Good Performance of the Stopband, and Notched Band in Passband

우수한 차단 대역 특성과 통과 대역 내에 저지 대역을 갖는 UWB 대역 통과 필터 설계

  • An, Jae-Min (Department of Electronic and Computer Engineering, Chonnam National University) ;
  • Kim, Yu-Seon (Department of Electronic and Computer Engineering, Chonnam National University) ;
  • Pyo, Hyun-Seong (Department of Electronic and Computer Engineering, Chonnam National University) ;
  • Lee, Hye-Sun (Department of Electronic and Computer Engineering, Chonnam National University) ;
  • Lim, Yeong-Seog (Department of Electronic and Computer Engineering, Chonnam National University)
  • 안재민 (전남대학교 전자컴퓨터공학과) ;
  • 김유선 (전남대학교 전자컴퓨터공학과) ;
  • 표현성 (전남대학교 전자컴퓨터공학과) ;
  • 이혜선 (전남대학교 전자컴퓨터공학과) ;
  • 임영석 (전남대학교 전자컴퓨터공학과)
  • Published : 2010.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we designed and fabricated a ultra-wideband(UWB) bandpass filter with a good performance of a stopband, and a notched band in passband. The transformed equivalent circuit of the highpass filter was realized by distributed element. A wide-passband with 3-dB fractional bandwidth of more than 100 % was achieved by using optimum response of the HPF. For improving lower and upper stopband characteristic, a cross coupling between feed lines was employed, which was analyzed by desegmentation technique. In order to reject interference of Wireless LAN and Hyper LAN(5.15~5.825 GHz), the narrow notched(rejection) band was realized by a spurline. The fabricated BPF indicated the passband from 3.1 to 10.55 GHz and the flat group delay of less than 0.94 ns over the entire passband except the rejection band. The filter shown sharp attenuation both inside and outside the band and notched band from 5.2 to 6.12 GHz.

분산 소자로 이루어진 고역 통과 필터의 최적화된 응답을 이용하여 우수한 차단 대역 특성과 통과 대역 내에 저지 대역을 갖는 UWB 대역 통과 필터를 설계 제작하였다. 변형된 고역 통과 필터의 등가 회로를 분산 소자로 구성하고, 최적화를 통해 FBW 100 % 이상의 넓은 통과 대역을 갖도록 하였다. Desegmentation technique로 급전선로간의 커플링 효과를 분석하고, 이를 이용하여 통과 대역 상, 하측의 우수한 차단 특성을 구현하였다. 또한, 최근 문제가 되고 있는 Wireless LAN과 Hyper LAN 대역(5.15~5.825 GHz)에서의 간섭 문제 해결을 위해, spurline을 추가하여 대역 저지를 실현하였다. 제작된 필터는 3.1~10.55 GHz의 통과 대역과 0.94 ns 이하의 평탄한 군 지연 응답을 보였고, 통과 대역 양단의 우수한 차단 대역과 5.2~6.12 GHz의 저지 대역이 측정되었다.

Keywords

References

  1. Federal Communications Commission, "Revision of part 15 of the commission's rules regarding ultrawideband transmission systems", Tech. Rep., ETDocket 98-153, FCC 02-48, Apr. 2002.
  2. G. L. Matthaei, L. Young, and E. M. Jones, Microwave Filters, Impedance-matching Networks, and Coupling Structures, Artech-House, 1980.
  3. K. S. Chin, L. Y. Lin, and J. T. Kuo, "New formulas for synthesizing microstrip bandpass filters with relatively wide bandwidths", IEEE Microwave Wire-less Compon. Lett., vol. 14, no. 5, pp. 231-233, May 2004. https://doi.org/10.1109/LMWC.2004.827865
  4. C. W. Tang, C. C. Tseng, H. H. Liang, and S. F. You, "Development of ultra-wideband LTCC filter", IEEE ICU, pp. 5-8, Sep. 2005. https://doi.org/10.1109/ICU.2005.1570006
  5. H. Ishida, K. Araki, "Design and analysis of UWB bandpass filter with ring filter", IEEE MTT-S Int. Dig., pp. 1307-1310, Jun. 2004. https://doi.org/10.1109/MWSYM.2004.1338806
  6. L. Zhu, S. Sun, and W. Menzel, "Ultra-wideband (UWB) bandpass filters using multiple-mode resonator", IEEE Microwave Wireless Compon. Lett., vol. 15, no. 11, pp. 796-798, Nov. 2005. https://doi.org/10.1109/LMWC.2005.859011
  7. C. L. Hsu, F. C. Hsu, and J. T. Kuo, "Microstrip bandpass filter for ultra-wideband(UWB) wireless communications", IEEE MTT-S Int. Dig., pp. 679-682, Jun. 2005. https://doi.org/10.1109/MWSYM.2005.1516698
  8. J. S. Hong, M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, New York: John Wiley & Sons, 2001.
  9. K. C. Gupta, M. D. Abouzahra, Analysis and Design of Planar Microwave Components, IEEE Press, pp. 75-86, 1994.
  10. H. Shaman, J. S. Hong, "A novel ultra-wideband (UWB) bandpass filter(BPF) with pairs of transmission zeros", IEEE Microw. Wireless Compon. Lett., vol. 17, no. 2, pp.121-123, Feb. 2007. https://doi.org/10.1109/LMWC.2006.890335
  11. P. I. Richards, "Resistor-transmission-line circuits", Proc. IRE, vol. 36, no. 2, pp. 217-220, Feb. 1948. https://doi.org/10.1109/JRPROC.1948.233274
  12. E. M. T. Jones, J. T. Bolljahn, "Coupled-striptransmission line filters and directional couplers", IRE Trans. Microwave Theory and Techniques, vol. MTT-4, pp. 78-81, Apr. 1956.
  13. Cam Nguyen, Kai chang, "On the analysis and design of spurline bandstop filters", IEEE Trans. Microwave Theory and Techniques, vol. MTT-33, no. 12, pp. 1416-1421, Dec. 1985. https://doi.org/10.1109/TMTT.1985.1133233