Vol. 119

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2011-08-16

A Coupled-Line Band-Stop Filter with Three-Section Transmission-Line Stubs and Wide Upper Pass-Band Performance

By Yongle Wu and Yuan'an Liu
Progress In Electromagnetics Research, Vol. 119, 407-421, 2011
doi:10.2528/PIER11072003

Abstract

A novel band-stop filter with wide upper pass-band performance is proposed and discussed in this paper. This band-stop filter includes two three-section transmission-line stubs and a parallel coupled-line section. Because three-section transmission-line stubs and coupled-line section are used, this filter not only features good band-stop filtering property, but also has wide upper pass band. In order to verify this new filter circuit structure and its corresponding design theory, three groups of numerical examples are demonstrated. Finally, two practical band-stop filters using common microstrip technology are designed, simulated and measured. The simulated and measured results indicate that both the coupled-line section with weak coupling and two three-section stubs can improve the upper pass-band performance. Furthermore, the measured results of the second fabricated microstrip band-stop filter (Filter B) show that the 20-dB insertion-loss band-stop bandwidth at 0.46 GHz is 90 MHz and the 1.2-dB transmission coefficient upper pass band is from 0.66 GHz to 2.52 GHz. Thus, the highest pass-band frequency is extended to larger than five times of the operating center frequency of stop band.

Citation


Yongle Wu and Yuan'an Liu, "A Coupled-Line Band-Stop Filter with Three-Section Transmission-Line Stubs and Wide Upper Pass-Band Performance," Progress In Electromagnetics Research, Vol. 119, 407-421, 2011.
doi:10.2528/PIER11072003
http://jpier.org/PIER/pier.php?paper=11072003

References


    1. Hong, J.-S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Chapters 2 and 6, Wiley, New York, 2001.

    2. Wu, Y., Y. Liu, S. Li, and C. Yu, "A simple microstrip bandpass filter with analytical design theory and sharp skirt selectivity," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 8-9, 1253-1263, 2011.
    doi:10.1163/156939311795762060

    3. Yu, W.-H., J.-C. Mou, X. Li, and X. Lv, "A compact filter with sharp-transition and wideband-rejection using the novel defected ground structure," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 2-3, 329-340, 2009.
    doi:10.1163/156939309787604454

    4. Wang, Y. X., "Microstrip cross-coupled tri-section stepped-impedance bandpass filter with wide stop-band performance," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 2-3, 289-296, 2009.
    doi:10.1163/156939309787604391

    5. Al-Zayed, A. S. and S. F. Mahmoud, "On the design of an improved dual operation, wide band ring resonator filter," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 14-15, 1939-1946, 2009.
    doi:10.1163/156939309789932485

    6. Wu, Y., Y. Liu, S. Li, and C. Yu, "A new wide-stopband low-pass filter with generalized coupled-line circuit and analytical theory," Progress In Electromagnetics Research, Vol. 116, 553-567, 2011.

    7. Chen, H., Y.-H. Wu, Y.-M. Yang, and Y.-X. Zhang, "A novel and compact bandstop filter with folded microstrip/CPW hybrid structure," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 1, 103-112, 2010.
    doi:10.1163/156939310790322163

    8. Khalilpour, J. and M. Hakkak, "Controllable waveguide bandstop filter using S-shaped ring resonators," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 5-6, 587-596, 2010.
    doi:10.1163/156939310791036458

    9. Luo, X., J.-G. Ma, K. Ma, and K. S. Yeo, "Compact UWB bandpass filter with ultra narrow notched band," IEEE Microwave and Wireless Components Letters, Vol. 20, No. 3, 145-147, 2010.
    doi:10.1109/LMWC.2010.2040212

    10. Luo, X., H. Qian, J.-G. Ma, K. Ma, and K. S. Yeo, "Compact dual-band bandpass filters using novel embedded spiral resonator (ESR)," IEEE Microwave and Wireless Components Letters, Vol. 20, No. 8, 435-437, 2010.
    doi:10.1109/LMWC.2010.2050195

    11. Shaman, H. and J.-S. Hong, "Wideband bandstop filter with cross-coupling," IEEE Trans. Microw. Theory Tech., Vol. 55, No. 8, 1780-1785, 2007.
    doi:10.1109/TMTT.2007.901600

    12. Mandal, M. K., V. K. Velidi, S. Sanyal, and A. Bhattacharya, "Design of ultra-wideband bandstop filter with three transmission zeros," Microwave and Optical Technology Letters, Vol. 50, No. 11, 2955-2957, 2008.
    doi:10.1002/mop.23819

    13. Mandal, M. K. and S. Sanyal, "Compact bandstop filter using signal interference technique," Electronics Letters, Vol. 43, No. 2, 110-111, 2007.
    doi:10.1049/el:20072547

    14. Miguel, A. S.-S., T.-P. German, and B. Enrique, "Compact wideband bandstop filter with four transmission zeros," IEEE Microwave and Wireless Components Letters, Vol. 20, No. 6, 313-315, 2010.
    doi:10.1109/LMWC.2010.2047468

    15. Velidi, V. K., A. B. Guntupalli, and S. Sanyal, "Sharp-rejection ultra-wide bandstop filters," IEEE Microwave and Wireless Components Letters, Vol. 19, No. 8, 503-505, 2009.
    doi:10.1109/LMWC.2009.2024834

    16. Malherbe, J. A. G. and C. A. Reid, "Double resonant stub bandstop filter with pseudo-elliptic response," Electronics Letters, Vol. 46, No. 7, 508-509, 2010.
    doi:10.1049/el.2010.0100

    17. Abbosh, A. M., "Multilayer bandstop filter for ultra wideband systems," IET Microwaves, Antennas & Propagation, Vol. 3, No. 1, 130-136, 2009.
    doi:10.1049/iet-map:20070294

    18. Han, S. H., X.-L. Wang, and Y. Fan, "Analysis and design of multiple-band bandstop filters," Progress In Electromagnetics Research, Vol. 70, 297-306, 2007.
    doi:10.2528/PIER07020903

    19. Woo, D.-J., T.-K. Lee, J.-W. Lee, C.-S. Pyo, and W.-K. Choi, "Novel U-slot and V-slot DGSs for bandstop filter with improved Q Factor," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 6, 2840-2847, 2006.
    doi:10.1109/TMTT.2006.875450

    20. Fallahzadeh, S. and M. Tayarani, "A compact microstrip bandstop filter," Progress In Electromagnetics Research Letters, Vol. 11, 167-172, 2009.
    doi:10.2528/PIERL09082407

    21. Levy, R., R. V. Snyder, and S. Sanghoon, "Bandstop filters with extended upper passbands," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 6, 2503-2515, 2006.
    doi:10.1109/TMTT.2006.875804

    22. Alkanhal, M. A. S., "Compact bandstop filters with extended upper passbands," Active and Passive Electronic Components, Vol. 2008, ID 356049, 1-6, 2008.

    23. Tang, W. and J.-S. Hong, "Coupled stepped-impedance-resonator bandstop filter," IET Microwaves, Antennas & Propagation, Vol. 4, No. 9, 1283-1289, 2010.
    doi:10.1049/iet-map.2009.0419