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2014-04-20

A Folded Sir Cross Coupled WLAN Dual-Band Filter

By Zi Jian Su, Xi Chen, Long Li, Bian Wu, and Chang-Hong Liang
Progress In Electromagnetics Research Letters, Vol. 45, 115-119, 2014
doi:10.2528/PIERL14032502

Abstract

A compact cross-coupled dual-band bandpass filter based on folded Stepped Impedance Resonators (SIRs) with four controllable transmission zeros is proposed in this paper. A pair of stepped impedance tapped lines is utilized to improve the dual band impedance matching, which reduces the insertion loss of the filter; meanwhile the tapped lines are also coupled with non-adjacent resonators to produce transmission zeros to improve skirt characteristics. At the end of this paper, the simulated and measured results are compared with each other, and good agreement is achieved.

Citation


Zi Jian Su, Xi Chen, Long Li, Bian Wu, and Chang-Hong Liang, "A Folded Sir Cross Coupled WLAN Dual-Band Filter," Progress In Electromagnetics Research Letters, Vol. 45, 115-119, 2014.
doi:10.2528/PIERL14032502
http://www.jpier.org/PIERL/pier.php?paper=14032502

References


    1. Kuo, J.-T., T.-H. Yeh, and C.-C. Yeh, "Design of microstrip bandpass filters with a dual-passband response," IEEE Trans. Microw. Theory. Tech., Vol. 53, No. 4, 1331-1337, Apr. 2005.
    doi:10.1109/TMTT.2005.845765

    2. Weng, M.-H., H.-W. Wu, and Y.-K. Su, "Compact and low loss dual-band bandpass filter using pseudo-interdigital stepped impedance resonators for WLANs," IEEE Microw. Wirel. Compon. Lett., Vol. 17, No. 3, 187-189, Mar. 2007.
    doi:10.1109/LMWC.2006.890463

    3. Fan, J.-W., C.-H. Liang, and X.-W. Dai, "Design of cross-coupled dual-band filter with equal-length split-ring resonators," Progress In Electromagnetics Research, Vol. 75, 285-293, 2007.
    doi:10.2528/PIER07060904

    4. Chen, Z.-X., X.-W. Dai, and C.-H. Liang, "Novel dual-mode dual-band bandpass filter using double square-loop structure," Progress In Electromagnetics Research, Vol. 77, 409-416, 2007.
    doi:10.2528/PIER07082803

    5. Wu, G.-L., W. Mu, X.-W. Dai, and Y.-C. Jiao, "Design of novel dual-band bandpass filter with microstrip meander-loop resonator and CSRR DGS," Progress In Electromagnetics Research, Vol. 78, 17-24, 2008.
    doi:10.2528/PIER07090301

    6. Wang, X.-H. and B.-Z.Wang, "Compact broadband dual-band bandpass filters using slotted ground structures," Progress In Electromagnetics Research, Vol. 82, 151-166, 2008.
    doi:10.2528/PIER08030101

    7. Velazquez-Ahumada, M. D. C., "Application of stub loaded folded stepped impedance resonators to dual band filter design," Progress In Electromagnetics Research, Vol. 102, 107-124, 2010.
    doi:10.2528/PIER10011406

    8. Yang, R.-Y., "Design of dual-band bandpass filters using a dual feeding structure and embedded uniform impedance resonators," Progress In Electromagnetics Research, Vol. 105, 93-102, 2010.

    9. Wu, Y.-L., C. Liao, and X.-Z. Xiong, "A dual-wideband bandpass filer based on E-shaped microstrip SIR with improved upper stopband performance," Progress In Electromagnetics Research, Vol. 18, 141-153, 2010.
    doi:10.2528/PIER10071802

    10. Chen, C.-Y. and C.-C. Lin, "The design and fabrication of a highly compact microstrip dual-band bandpass filter," Progress In Electromagnetics Research, Vol. 112, 299-307, 2011.

    11. Ma, D.-C., Z.-Y. Xiao, L.-L. Xiang, X.-H. Wu, C.-Y. Huang, and X. Kou, "Compact dual-band bandpass filter using folded SIR with two stubs for WLAN," Progress In Electromagnetics Research, Vol. 117, 357-364, 2011.

    12. Ning, H., J. Wang, Q. Xiong, and L. Mao, "Desing of planar dual and triple narrowband bandstop filters with independently controlled stopbands and improved spurious response," Progress In Electromagnetics Research, Vol. 131, 259-274, 2012.
    doi:10.2528/PIER12072109

    13. Makimoto, M. and S. Yamashita, "Bandpass filters using parallel coupled stripline stepped impedance resonators," IEEE Trans. Microw. Theory. Tech., Vol. 28, No. 12, 1413-1417, Dec. 1980.
    doi:10.1109/TMTT.1980.1130258

    14. Sagawa, M., M. Makimoto, and S. Yamashita, "Geometrical structures and fundamental characteristics of microwave stepped-impedance resonators," IEEE Trans. Microw. Theory. Tech., Vol. 45, No. 7, 1078-1085, Jul. 1997.
    doi:10.1109/22.598444

    15. Kuo, J.-T. and E. Shih, "Microstrip stepped impedance resonator bandpass filter with an extended optimal rejection bandwidth," IEEE Trans. Microw. Theory. Tech., Vol. 51, No. 5, 1554-1559, May 2003.
    doi:10.1109/TMTT.2003.810138

    16. Cameron, R. J., "General coupling matrix synthesis methods for Chebyshev filtering functions," IEEE Trans. Microw. Theory. Tech., Vol. 47, No. 4, 433-442, Apr. 1999.
    doi:10.1109/22.754877

    17. Matsuo, M., H. Yabuki, and M. Makimoto, "The design of a half-wavelength resonator BPF with attenuation poles at desired frequencies," EEE MTT-S Int. Microw. Symp. Dig., 1181-1184, 2000.