Vol. 21
Latest Volume
All Volumes
PIERC 129 [2023] PIERC 128 [2023] PIERC 127 [2022] PIERC 126 [2022] PIERC 125 [2022] PIERC 124 [2022] PIERC 123 [2022] PIERC 122 [2022] PIERC 121 [2022] PIERC 120 [2022] PIERC 119 [2022] PIERC 118 [2022] PIERC 117 [2021] PIERC 116 [2021] PIERC 115 [2021] PIERC 114 [2021] PIERC 113 [2021] PIERC 112 [2021] PIERC 111 [2021] PIERC 110 [2021] PIERC 109 [2021] PIERC 108 [2021] PIERC 107 [2021] PIERC 106 [2020] PIERC 105 [2020] PIERC 104 [2020] PIERC 103 [2020] PIERC 102 [2020] PIERC 101 [2020] PIERC 100 [2020] PIERC 99 [2020] PIERC 98 [2020] PIERC 97 [2019] PIERC 96 [2019] PIERC 95 [2019] PIERC 94 [2019] PIERC 93 [2019] PIERC 92 [2019] PIERC 91 [2019] PIERC 90 [2019] PIERC 89 [2019] PIERC 88 [2018] PIERC 87 [2018] PIERC 86 [2018] PIERC 85 [2018] PIERC 84 [2018] PIERC 83 [2018] PIERC 82 [2018] PIERC 81 [2018] PIERC 80 [2018] PIERC 79 [2017] PIERC 78 [2017] PIERC 77 [2017] PIERC 76 [2017] PIERC 75 [2017] PIERC 74 [2017] PIERC 73 [2017] PIERC 72 [2017] PIERC 71 [2017] PIERC 70 [2016] PIERC 69 [2016] PIERC 68 [2016] PIERC 67 [2016] PIERC 66 [2016] PIERC 65 [2016] PIERC 64 [2016] PIERC 63 [2016] PIERC 62 [2016] PIERC 61 [2016] PIERC 60 [2015] PIERC 59 [2015] PIERC 58 [2015] PIERC 57 [2015] PIERC 56 [2015] PIERC 55 [2014] PIERC 54 [2014] PIERC 53 [2014] PIERC 52 [2014] PIERC 51 [2014] PIERC 50 [2014] PIERC 49 [2014] PIERC 48 [2014] PIERC 47 [2014] PIERC 46 [2014] PIERC 45 [2013] PIERC 44 [2013] PIERC 43 [2013] PIERC 42 [2013] PIERC 41 [2013] PIERC 40 [2013] PIERC 39 [2013] PIERC 38 [2013] PIERC 37 [2013] PIERC 36 [2013] PIERC 35 [2013] PIERC 34 [2013] PIERC 33 [2012] PIERC 32 [2012] PIERC 31 [2012] PIERC 30 [2012] PIERC 29 [2012] PIERC 28 [2012] PIERC 27 [2012] PIERC 26 [2012] PIERC 25 [2012] PIERC 24 [2011] PIERC 23 [2011] PIERC 22 [2011] PIERC 21 [2011] PIERC 20 [2011] PIERC 19 [2011] PIERC 18 [2011] PIERC 17 [2010] PIERC 16 [2010] PIERC 15 [2010] PIERC 14 [2010] PIERC 13 [2010] PIERC 12 [2010] PIERC 11 [2009] PIERC 10 [2009] PIERC 9 [2009] PIERC 8 [2009] PIERC 7 [2009] PIERC 6 [2009] PIERC 5 [2008] PIERC 4 [2008] PIERC 3 [2008] PIERC 2 [2008] PIERC 1 [2008]
2011-04-19
Microstrip Bandpass Filters Using Dual-Mode Resonators with Internal Coupled Lines
By
Progress In Electromagnetics Research C, Vol. 21, 99-111, 2011
Abstract
This paper presents a new dual-mode stub-loaded resonator, which consists of a microstrip resonator with internal coupled lines and an open-circuit stub. Based on the odd- and even-mode equivalent circuits, the resonant characteristics of the proposed microstrip resonator are investigated. It is found that the fundamental even-mode resonant frequency of the proposed resonator can be flexibly controlled while the fundamental odd-mode resonant frequency remains unaffected. Then, based on the proposed resonator, three compact dual-mode bandpass filters, namely filer A, filter B and filter C, are designed, fabricated and measured to validate the design concept. Filters A and B demonstrate opposite asymmetric responses with two transmission poles in the passband and a transmission zero in the stopband. Filter C has three transmission poles in the passband and two transmission zeros respectively in the lower and upper stopbands to enhance selectivity. The experimental results show excellent agreement with the theoretical simulation results.
Citation
Changzhou Hua Chunhong Chen Chen Miao Wen Wu , "Microstrip Bandpass Filters Using Dual-Mode Resonators with Internal Coupled Lines," Progress In Electromagnetics Research C, Vol. 21, 99-111, 2011.
doi:10.2528/PIERC11031003
http://www.jpier.org/PIERC/pier.php?paper=11031003
References

1. Wolff, I., "Microstrip bandpass filter using degenerate modes of a microstrip ring resonator," Electronics Lett., Vol. 8, No. 12, 302-303, 1972.
doi:10.1049/el:19720223

2. Hong, J.-S. and M. J. Lancaster, "Bandpass characteristics of new dual-mode microstrip square loop resonators," Electronics Lett., Vol. 30, No. 11, 891-892, 1995.
doi:10.1049/el:19950591

3. Hong, J.-S. and S. Li, "Theory and experiment of dual-mode microstrip triangular patch resonators and filters," IEEE Trans. Microw. Theory Tech., Vol. 52, No. 4, 1237-1243, 2004.
doi:10.1109/TMTT.2004.825653

4. Hong, J.-S., H. Shanman, and Y. H. Chun, "Dual-mode microstrip open loop resonators and filters," IEEE Trans. Microw. Theory Tech., Vol. 55, No. 8, 1764-1770, 2007.
doi:10.1109/TMTT.2007.901592

5. Song, K. and Q. Xue, "Novel broadband bandpass filters using Y-shaped dual-mode microstrip resonators," IEEE Microw. Wirel. Compon. Lett., Vol. 19, No. 8, 548-550, 2009.
doi:10.1109/LMWC.2009.2027058

6. Wang, Y.-X., B.-Z. Wang, and J. Wang, "A compact square loop dual-mode bandpass filter with wide stop-band," Progress In Electromagnetics Research, Vol. 77, 67-73, 2007.
doi:10.2528/PIER07072707

7. 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

8. Huang, C.-Y., M.-H. Weng, C.-S. Ye, and Y.-X. Xu, "A high band isolation and wide stopband diplexer using dual-mode stepped-impedance resonators," Progress In Electromagnetics Research, Vol. 100, 299-308, 2010.
doi:10.2528/PIER09112701

9. Chiou, Y.-C., P.-S. Yang, J.-T. Kuo, and C.-Y.Wu, "Transmission zero design graph for dual-mode dual-band filter with periodic stepped-impedance ring resonator ," Progress In Electromagnetics Research, Vol. 108, 23-36, 2010.
doi:10.2528/PIER10071608

10. Hong, J.-S. and M. J. Lancaster, "Microstrip cross-coupled trisection bandpass filters with asymmetric frequency characteristics," IEE Proc. Microw. Antennas Propag., Vol. 146, No. 1, 84-90, 1999.
doi:10.1049/ip-map:19990146

11. Kurzrok, R. M., "General three-resonator filters in waveguide," IEEE Trans. Microw. Theory Tech., Vol. 14, No. 1, 46-47, 1966.
doi:10.1109/TMTT.1966.1126154

12. Chang, C.-Y. and C.-C Chen, "A novel coupling structure suitable for cross-coupled filters with folded quarter-wave resonators," IEEE Microw. Wirel. Compon. Lett., Vol. 13, No. 12, 517-519, 2003.
doi:10.1109/LMWC.2003.819957

13. Mongia, R., I. Bahl, and P. Bhartia, RF and Microwave Coupledline Circuits, Artech House, Norwood, MA, 1999.

14. Matsuo, M., H. Yabuki, and M. Makimoto, "Dual-mode stepped-impedance ring resonator for bandpass filter applications," IEEE Trans. Microw. Theory Tech., Vol. 49, No. 7, 1235-1240, 2001.
doi:10.1109/22.932241

15. Pozar, D. M., Microwave Engineering, 3rd Ed., Wiley, New York, 2005.