Vol. 23

Front:[PDF file] Back:[PDF file]
Latest Volume
All Volumes
All Issues
2011-04-14

Compact Dual-Band Bandpass Filter Using Improved Split Ring Resonators Based on Stepped Impedance Resonator

By Liang Zhou, Shaobin Liu, Hai Feng Zhang, Xiang-Kun Kong, and Ya-Nan Guo
Progress In Electromagnetics Research Letters, Vol. 23, 57-63, 2011
doi:10.2528/PIERL11030402

Abstract

In this letter, a compact planer dual-band bandpass filter(BPF) using novel split-ring resonators (SRRs) is proposed. Compared with conventional SRRs, the stepped impedance split ring resonator (SIR-SRR) has better performance on miniaturization. To verify good characteristics of the novel structure, a new resonator-embedded cross-coupled filter, constructed by a pair of new resonators, is designed. This new filter has good characteristics of compact size and high selectivity. The improved SRR unit cell has a size of 0.108λg×0.108λg (where λg is the guided wavelength) at central frequency (2.25 GHz) of upper passband. Simulated results show that two central frequencies of the filter locate at 1.90 and 2.25 GHz with 3-dB fractional bandwidths of 1.0% and 7.7%, respectively. The lower passband band is generated by inner resonator with a via hole to gound plane, while the upper passband is created by outer resonator. Moreover, a good out-band performance is shown in this letter. Its stop-bands are extended 0-1.85 GHz at lower band and 2.4-5.8 GHz at upper band with a rejection level of about 20-dB. The measured and simulated results are well complied with each other.

Citation


Liang Zhou, Shaobin Liu, Hai Feng Zhang, Xiang-Kun Kong, and Ya-Nan Guo, "Compact Dual-Band Bandpass Filter Using Improved Split Ring Resonators Based on Stepped Impedance Resonator," Progress In Electromagnetics Research Letters, Vol. 23, 57-63, 2011.
doi:10.2528/PIERL11030402
http://jpier.org/PIERL/pier.php?paper=11030402

References


    1. Pendry, J. B., A. J. Holden, D. J. Robbins, and W. J. Stewart, "Magnetism from conductors and enhanced nonlinear phenomena," IEEE Trans. Microw. Theory Tech., Vol. 47, No. 11, 2075-2084, Nov. 1999.
    doi:10.1109/22.798002

    2. Falcone, F., T. Lopetegi, J. D. Baena, R. Marques, F. Martin, and M. Sorolla, "Effective negative-epsilon stopband microstrip lines based on complementary split ring resonators," IEEE Microw. Wireless Compon. Lett., Vol. 14, No. 6, 280-282, Jun. 2004.
    doi:10.1109/LMWC.2004.828029

    3. Garcia, J., J. Bonache, I. Gil, F. Martin, M. Castillo, and , "Miniaturized microstrip and CPW filters using coupled metamaterial resonators," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 6, 2628-2635, Jun. 2006.
    doi:10.1109/TMTT.2006.872934

    4. Burokur, S. N., M. Latrach, and S. Toutain, "Analysis and design of waveguides loaded with split-ring resonators," Journal of Electromagnetic Waves and Applications, Vol. 19, No. 10, 1407-1421, 2005.
    doi:10.1163/156939305775525864

    5. Zheng, Z.-A. and Q.-X. Chu, "Compact CPW-FED UWB antenna with dual band-notched characteristics," Progress In Electromagnetic Research Letters, Vol. 11, 83-91, 2009.
    doi:10.2528/PIERL09071809

    6. Levy, R., "Filters with single transmission zeros at real or imaginary frequencies," IEEE Trans. Microwave Theory Tech., Vol. 24, 172-181, Apr. 1976.
    doi:10.1109/TMTT.1976.1128811

    7. Hong, J.-S. and M. J. Lancaster, "Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters," IEEE Trans. Microwave Theory Tech., Vol. 44, 2099-2109, Dec. 1996.
    doi:10.1109/22.543968

    10. Makimoto, M. and S. Yamashita, "Bandpass filters using parallel coupled stripline stepped impedance resonators," IEEE Trans. Microwave Theory Tech., Vol. 28, 1413-1417, Dec. 1980.
    doi:10.1109/TMTT.1980.1130258