Vol. 23
Latest Volume
All Volumes
PIERC 142 [2024] PIERC 141 [2024] PIERC 140 [2024] PIERC 139 [2024] PIERC 138 [2023] PIERC 137 [2023] PIERC 136 [2023] PIERC 135 [2023] PIERC 134 [2023] PIERC 133 [2023] PIERC 132 [2023] PIERC 131 [2023] PIERC 130 [2023] 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]
2011-08-04
LTCC Fold-Back Bandpass Filter Designed with Capacitively Loaded Stubs
By
Progress In Electromagnetics Research C, Vol. 23, 95-109, 2011
Abstract
This study presents a design of a compact stub-type bandpass filter with capacitively loaded stubs and a fold-back structure. This paper employed the fabrication process of low-temperature co-fired ceramic (LTCC) for filter realization of a multi-layer structure. The proposed filter structure required adding end capacitors to stubs to extend their electrical length, while achieving a length reduction of 30%. This study provided design curves to determine the dimensions of the end capacitor for reaching maximum electrical length extension. In addition, a fold-back configuration was applied to halve the filter size. An experimental filter operating at 5.8 GHz was fabricated and measured to validate the design concept, achieving a highly compact size of 14.3×8.2×0.76 mm3.
Citation
Kuo-Sheng Chin, Jian-Luen Hung, Chun-Wei Huang, Shu-Peng Huang, Yung-An Kao, and Shuh-Han Chao, "LTCC Fold-Back Bandpass Filter Designed with Capacitively Loaded Stubs," Progress In Electromagnetics Research C, Vol. 23, 95-109, 2011.
doi:10.2528/PIERC11062704
References

1. Hong, J.-S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Application Engineering, John Wiley & Sons, New York, 2001.

2. Chang, K., I. Bahl, and V. Nair, RF and Microwave Circuit and Component Design for Wireless Systems, John Wiley & Sons, New York, 2002.

3. Matthaei, G. L., L. Young, and E. M. T. Johns, "Microwave Filters, Impedance Matching Networks, and Coupling Structures," Artech House, Norwood, MA, 1980.

4. Abdel-Rahman, A., A. K. Verma, A. Boutejdar, and A. S. Omar, "Compact stub type microstrip bandpass filter using defected ground plane," IEEE Microwave and Wireless Components Letters, Vol. 14, No. 4, 136-138, 2004.
doi:10.1109/LMWC.2003.821503

5. Lin, W.-J., C.-S. Chang, J.-Y. Li, D.-B. Lin, L.-S. Chen, and M.-P. Houng, "Improved compact broadband bandpass filter using branch stubs co-via structure with wide stopband characteristic," Progress In Electromagnetics Research C, Vol. 5, 45-55, 2008.

6. Razalli, M. S., A. Ismail, M. A. Mahdi, and M. N. Bin Hamidon, "Novel compact microstrip ultra-wideband filter utilizing short-circuited stubs with less vias," Progress In Electromagnetics Research, Vol. 88, 91-104, 2008.
doi:10.2528/PIER08102303

7. Zhang, L., Z.-Y. Yu, and S.-G. Mo, "Novel planar multimode bandpass filters with radial-line stubs," Progress In Electromagnetics Research, Vol. 101, 33-42, 2010.
doi:10.2528/PIER09121303

8. Li, R., S. Sun, and L. Zhu, "Synthesis design of ultra-wideband bandpass filters with composite series and shunt stubs," IEEE Trans. Microwave Theory Tech., Vol. 51, 684-692, 2009.

9. Ma, Z., K. Kikuchi, Y. Kobayashi, T. Anada, and G. Hagiwara, "Novel microstrip dual-band bandstop filter with controllable dual-stopband response ," Proceedings of Asia-Pacific Microwave Conference, 1177-1180, 2006.

10. Tsai, C.-M., H.-M. Lee, and C.-C. Tsai, "Planar filter design with fully controllable second passband," IEEE Trans. Microwave Theory Tech., Vol. 53, 3429-3439, 2005.
doi:10.1109/TMTT.2005.855739

11. Chin, K.-S. and C.-K. Lung, "Miniaturized microstrip dual-band bandstop filters using tri-section stepped-impedance resonators," Progress In Electromagnetics Research C, Vol. 10, 37-48, 2009.
doi:10.2528/PIERC09080306

12. Chin, K.-S. and J.-H. Yeh, "Dual-wideband bandpass filter using short-circuited stepped-impedance resonators," IEEE Microwave and Wireless Components Letters, Vol. 19, No. 3, 155-157, 2009.
doi:10.1109/LMWC.2009.2013736

13. Quendo, C., E. Rius, and C. Person, "Narrow bandpass filters using dual-behavior resonators," IEEE Trans. Microwave Theory Tech., Vol. 51, 734-743, 2003.
doi:10.1109/TMTT.2003.808729

14. Zhu, L. and W. Menzel, "Compact microstrip bandpass filter with two transmission zeros using a stub-tapped half-wavelength line resonator," IEEE Microwave and Wireless Components Letters, Vol. 13, 1618, 2003.

15. Lin, X.-M., "Design of compact tri-band bandpass filter using λ/4 and stub-loaded resonators ," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 14-15, 2029-2035, 2010.

16. Velázquez-Ahumada, M. D. C., J. Martel-Villagr, F. Medina, and F. Mesa, "Application of stub loaded folded stepped impedance resonators to dual band filters," Progress In Electromagnetics Research, Vol. 102, 107-124, 2010.
doi:10.2528/PIER10011406

17. Liu, C.-Y., T. Jiang, and Y.-S. Li, "A novel UWB filter with notch-band characteristic using radial-UIR/SIR loaded stub resonators ," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 2-3, 233-245, 2011.
doi:10.1163/156939311794362902

18. Yin, Q., L.-S. Wu, L. Zhou, and W.-Y. Yin, "Compact dual-band bandpass filter using asymmetrical dual stub-loaded open-loops," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 17-18, 2397-2406, 2010.
doi:10.1163/156939310793675718

19. Liu, H., R. H. Knoechel, and K. F. Schuenemann, "Miniaturized bandstop filter using meander spurline and capacitively loaded stubs," ETRI Journal, Vol. 29, No. 5, 2007.
doi:10.4218/etrij.07.0107.0077

20. Drozd, J. M. and W. T. Joines, "A capacitively loaded half-wavelength tapped-stub resonator," IEEE Trans. Microwave Theory Tech., Vol. 45, No. 7, 1100-1104, 1997.
doi:10.1109/22.598447

21. Hoa, D. T. and I. S. Kim, "Miniaturized low insertion loss multilayer capacitively loaded step-impedance interdigital bandpass filter," Proceedings of Asia Pacific Microwave Conference, 1-4, 2007.
doi:10.1109/APMC.2007.4554862

22. Görür, A., C. Karpuz, and M. Akpinar, "A reduced-size dual-mode bandpass filter with capacitively loaded open-loop arms," IEEE Microwave and Wireless Components Letters, Vol. 13, No. 9, 385-387, 2003.
doi:10.1109/LMWC.2003.817136

23. Stark, A. and A. F. Jacob, "A broadband vertical transition for millimeter-wave applications," Proceedings of the 38th European Microwave Conference, 476-479, 2008.

24. Valois, R., et al. "High performances of shielded LTCC vertical transitions from DC up to 50 GHz," IEEE Trans. Microwave Theory Tech., Vol. 53, No. 6, 2026-2032, 2005.
doi:10.1109/TMTT.2005.848832

25. Yang, T.-H., C.-F. Chen, T.-Y. Huang, C.-L. Wang, and R.-B. Wu, "A 60 GHz LTCC transition between microstrip line and substrate integrated waveguide," Proceedings of Asia Pacific Microwave Conference, 3 2005.

26. Lee, Y. C., "CPW-to-stripline vertical via transitions for 60 GHz LTCC SoP applications," Progress In Electromagnetics Research Letters, Vol. 2, 37-44, 2008.
doi:10.2528/PIERL07122805