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Journal of Shanghai University >

2017 , Vol. 23 >Issue 1: 147 - 154

DOI: https://doi.org/10.3969/j.issn.1007-2861.2015.01.019

A novel tri-section SIR dual-band filter with high stopband rejection

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  • 1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China;
    2. State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China

Received date: 2015-02-03

  Online published: 2017-02-28

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Abstract

A dual-band filter with high stopband rejection is designed using a tri-section signal to interference ratio (SIR) resonator. The center frequencies and first spurious frequencies of resonators can be controlled independently to design aspecific dual-band filter. The tri-section coupling structure is aimed at transmission zeros and high stopbands rejection. To get a high external quality factor, an inter-digital finger coupling structure is introduced. The filter has dual passband center frequencies of 1.57 GHz (GPS) and 2.5 GHz (4G), with 3 dB fractional bandwidths of 4.0% and 2.4%, respectively. Measured results well agree with simulations.

Key words：  high stopband rejection;  transmission zero;  tri-section coupling structure; tri-section signal to interference ratio (SIR) resonator

Cite this article

JIANG Yifei1,2, MENG Lingqin1,2, YANG Guangli1 . A novel tri-section SIR dual-band filter with high stopband rejection[J]. Journal of Shanghai University, 2017 , 23(1) : 147 -154 . DOI: 10.3969/j.issn.1007-2861.2015.01.019

References

[1] Miyake H, Kitazawa S, Ishizaki T, et al. A miniaturized monolithic dual band filter using ceramic lamination technique for dual mode portable telephones [C]// IEEE MTT-S International Microwave Symposium Digest. 1997: 789-792.
[2] Zhang X Y, Xue Q. Novel dual-mode dual-band filters using coplanar-waveguide-fed ring resonators[J]. Microwave Theory and Techniques, 2007, 55(10): 2183-2190.
[3] Liu H, Wang Y, Wang X, et al. Compact and high selectivity tri-band bandpass filter using multimode stepped-impedance resonator [J]. Microwave andWireless Components Letters, 2013, 23(10): 536-538.
[4] Chen W, Weng M, Chang S. A new tri-band bandpass filter based on stub-loaded stepimpedance resonator [J]. Microwave and Wireless Components Letters, 2012, 22(4): 179-181.
[5] Tseng C H, Shao H Y. A new dual-band microstrip bandpass filter using net-type resonators [J]. Microwave and Wireless Components Letters, 2010, 20(4): 196-198.
[6] Chen Y, Hsieh Y, Lee C, et al. Tri-band microstrip BPF design using tri-section SIRs [C]//Antennas and Propagation Society International Symposium. 2007: 3113-3116.
[7] Wei X, Wang P, Gao P, et al. Compact tri-band bandpass filter using open stub loaded trisection λ/4 stepped impedance resonator [J]. Microwave and Wireless Components Letters, 2014, 24(8): 512-514.
[8] Wei X, Yuan S, Ding B. Compact tri-band bandpass filter using tri-section stepped impedance resonators [C]// International Workshop on IEEE Microwave and Millimeter Wave Circuits and System Technology. 2013: 286-288.
[9] Ghatak R, Pal M, Sarkar P, et al. Tri-band bandpass filters using modified tri-section stepped impedance resonator with improved selectivity and wide upper stopband [J]. Institution of Engineering and Technology, 2013, 7(15): 1187-1193.
[10] Rusakov A, Jankovic N, Crnojevic-Bengin V. A compact tri-band bandpass filter based on grounded tri-mode stepped-impedance stub-loaded resonator [C]// International Conference on Telecommunication in Modern Satellite, Cable and Broadcasting Services. 2013: 273-276.

[11] Hong J S G, Lancaster M J. Microstrip filters for RF/microwave applications [M]. New York: John Wiley & Sons, 2004: 275-293.
[12] Zhang Y P, Sun M. Dual-band microstrip bandpass filter using stepped-impedance resonators with new coupling schemes [J]. IEEE Transactions on Microwave Theory and Techniques, 2006, 54(10): 3779-3785.

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