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Design of Low-Pass Type Inverter: UWB Band-Pass Filter with Low Spurious Characteristics 원문보기

Journal of the Korean Institute of Electromagnetic Engineering and Science, v.11 no.2, 2011년, pp.83 - 90  

Cho, Young-Ho (Department of Electronic Engineering, Sogang University) ,  Choi, Moon-Gyu (Department of Electronic Engineering, Sogang University) ,  Yun, Sang-Won (Department of Electronic Engineering, Sogang University)

Abstract ▼ AI-Helper 아이콘AI-Helper

In this paper, we present the design method for a low-pass type inverter, which can effectively suppress the spurious response associated with band-pass filters. The inverter has a length of ${\lambda}/4$ and employs not only a stepped-impedance configuration but also asymmetrical and ben...

주제어

#Stepped-Impedance Low-Pass Type Inverter   #Ultra-Wideband   #Quarter-Wave Stubs   #Wideband Filter  

AI 본문요약
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제안 방법

  • In this paper, we present an analysis and design method for an asymmetrical stepped-impedance low-pass type inverter with an overall electrical length of λ/4.
  • In this paper, we present an analysis and design method for an asymmetrical stepped-impedance low-pass type inverter with an overall electrical length of λ/4. The proposed inverter employs the asymmetrical and bending structure applied to the conventional stepped-impedance low-pass filter, so that it not only improves the performances of the spurious response and high selectivity, it does so while maintaining a compact size. Even though the proposed low-pass type inverter can be applied as impedance/admittance inverters on the band-pass filters, the UWB band-pass filter is chosen in order to show the usefulness of this type of inverter.
  • In order to improve selectivity, asymmetrical configuration is also discussed. The proposed stepped-impedance low-pass type inverter was analyzed through the even/odd mode analysis, and a 5th-order inverter is designed to be applied to the UWB band-pass filter. As a result, a UWB band-pass filter with an excellent spurious response up to 40 GHz could be achieved.

대상 데이터

  • The substrate is Rogers RO3003 with a relative dielectric constant of 3.0, a thickness of 20 mil, and a tanδ=0.0013.

이론/모형

  • 7(b) and (c) are the simulation results of the conventional stepped-impedance low-pass type inverter and the asymmetrical stepped-impedance low-pass type inverter. The simulation is performed using Agilent`s ADS Momentum. As shown in Fig.
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참고문헌 (18)

  1. S. -C. Lin, P. -H. Deng, Y. -S. Lin, C. -H. Wang, and C. -H. Chen, "Wide-stopband microstrip bandpass filters using dissimilar quarter-wavelength stepped- impedance resonator," IEEE Trans. Microwave Theory Tech., vol. 54, no. 3, pp. 1011-1018, Mar. 2006. 

    상세보기 crossref

  2. A. Namsang, T. Majaeng, J. Jantree, S. Chaimool, and P. Akkaraekthalin, "Stepped-impedance hairpin resonators with asymmetric capacitively loaded coupled lines for improved stopband characteristics," IEICE Trans. Electron., vol. e90-c, no. 12, pp. 2185- 2191, Dec. 2007. 

    상세보기 crossref

  3. M. C. V. Ahumada, J. Martel, and F. Medina, "Parallel coupled microstrip filters with ground-plane aperture for spurious band suppression and enhanced coupling," IEEE Trans. Microwave Theory Tech., vol. 52, no. 3, pp. 1082-1086, Mar. 2004. 

    상세보기 crossref

  4. J. -T. Kuo, M. Jiang, and H. -J. Chang, "Design of parallel-coupled microstrip filters with suppression of spurious resonances using substrate suspension," IEEE Trans. Microw. Theory Tech., vol. 52, no. 1, pp. 83- 89, Jan. 2004. 

    상세보기 crossref

  5. T. Lopetegi, M. A. G. Laso, J. Hernandez, M. Bacaicoa, D. Benito, M. J. Garde, M. Sorolla, and M. Guglielmi, "New microstrip 'Wiggly-line' filters with spurious passband suppression," IEEE Trans. Microw. Theory Tech., vol. 49, no. 9, pp. 1593-1598, Sep. 2001. 

    상세보기 crossref

  6. F. -R. Yang, K. -P. Ma, Y. Qian, and T. Itoh, "A uniplanar compact photonic-bandgap (UC-PBG) structure and its applications for microwave circuits," IEEE Trans. Microwave Theory Tech., vol. 47, no. 8, pp. 1509-1514, Aug. 1999. 

    상세보기 crossref

  7. J. T. Kuo, E. Shih, "Microstrip stepped impedance resonator bandpass filter with an extended optimal rejection bandwidth," IEEE Trans. Microw. Theory Tech., vol. 51, no. 5, pp. 1554-1559, May 2003. 

    상세보기 crossref

  8. P. -H. Deng, S. -C. Lin, Y. -S. Lin, C. -H. Wang, and C. H. Chen, "Microstrip bandpass filters with dissimilar resonators for suppression of spurious responses," in Proc. 35th Eur. Microw. Conf., pp. 1263- 1266, 2005. 

  9. K. F. Chang, K. W. Tam, "Miniaturized cross-coupled filter with second and third spurious responses suppression," IEEE Microw. Wireless Compon. Lett., vol. 15, no. 2, pp. 122-124, Feb. 2005. 

    상세보기 crossref

  10. J.-H. Hong, M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, Inc., pp. 109-121, 2001. 

  11. M. Uhm, K. Kim, and D. S. Filipovic, "Ultra-wideband bandpass filters using quarter-wave shortcircuited shunt stubs and quarter-wave series inverters," IEEE Microw. Wireless Compon. Lett., vol. 18, no. 10, pp. 668-1148, Oct. 2008. 

    상세보기 crossref

  12. Q. -X. Chu, S. -T. Li, "Compact UWB bandpass filter with improved upper-stopband performance," IEEE Microw. Wireless Compon. Lett., vol. 19, no. 1, Jan. 2009. 

    상세보기 crossref

  13. K. Li, Y. Yamamoto, D. Kurita, and O. Hashimoto, "An ultra-wideband (UWB) bandpass filter using broadside-coupled structure and lumped-capacitorloaded shunt stub resonators," IEICE Trans. Electron., vol. e90-c, no. 9, pp. 1736-1742, Sep. 2007. 

    상세보기 crossref

  14. Z. -C. Hao, J.-S. Hong, "Ultra-wideband bandpass filter using multilayer liquid-crystal-polymer technology," IEEE Trans. Microw. Theory Tech., vol. 56, no. 9, pp. 2095-2100, Sep. 2002. 

    상세보기 crossref

  15. Sai Wai Wong, Lei Zhu, "Implementation of compact UWB bandpass filter with a notch-band," IEEE Microw. Wireless Compon. Lett., vol. 18, no. 1, Jan. 2008. 

    상세보기 crossref

  16. J. -H. Hong, M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, Inc., pp. 109-121, 2001. 

  17. L. Zhu, K. Wu, "Short-open calibration technique for field theory-based parameter extraction of lumped elements of planar integrated circuits," IEEE Trans. Microw. Theory Tech., vol. 50, issue 8, pp. 1861- 1869, 2002. 

    상세보기 crossref

  18. I. -S. Kim, S. -W. Yun, "Compact LPF using asymmetrical microstrip step discontinuity for harmonic suppression," Electronics Letters, vol. 41, no. 16, Aug. 2005. 

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