Vol. 121
Latest Volume
All Volumes
PIER 179 [2024] PIER 178 [2023] PIER 177 [2023] PIER 176 [2023] PIER 175 [2022] PIER 174 [2022] PIER 173 [2022] PIER 172 [2021] PIER 171 [2021] PIER 170 [2021] PIER 169 [2020] PIER 168 [2020] PIER 167 [2020] PIER 166 [2019] PIER 165 [2019] PIER 164 [2019] PIER 163 [2018] PIER 162 [2018] PIER 161 [2018] PIER 160 [2017] PIER 159 [2017] PIER 158 [2017] PIER 157 [2016] PIER 156 [2016] PIER 155 [2016] PIER 154 [2015] PIER 153 [2015] PIER 152 [2015] PIER 151 [2015] PIER 150 [2015] PIER 149 [2014] PIER 148 [2014] PIER 147 [2014] PIER 146 [2014] PIER 145 [2014] PIER 144 [2014] PIER 143 [2013] PIER 142 [2013] PIER 141 [2013] PIER 140 [2013] PIER 139 [2013] PIER 138 [2013] PIER 137 [2013] PIER 136 [2013] PIER 135 [2013] PIER 134 [2013] PIER 133 [2013] PIER 132 [2012] PIER 131 [2012] PIER 130 [2012] PIER 129 [2012] PIER 128 [2012] PIER 127 [2012] PIER 126 [2012] PIER 125 [2012] PIER 124 [2012] PIER 123 [2012] PIER 122 [2012] PIER 121 [2011] PIER 120 [2011] PIER 119 [2011] PIER 118 [2011] PIER 117 [2011] PIER 116 [2011] PIER 115 [2011] PIER 114 [2011] PIER 113 [2011] PIER 112 [2011] PIER 111 [2011] PIER 110 [2010] PIER 109 [2010] PIER 108 [2010] PIER 107 [2010] PIER 106 [2010] PIER 105 [2010] PIER 104 [2010] PIER 103 [2010] PIER 102 [2010] PIER 101 [2010] PIER 100 [2010] PIER 99 [2009] PIER 98 [2009] PIER 97 [2009] PIER 96 [2009] PIER 95 [2009] PIER 94 [2009] PIER 93 [2009] PIER 92 [2009] PIER 91 [2009] PIER 90 [2009] PIER 89 [2009] PIER 88 [2008] PIER 87 [2008] PIER 86 [2008] PIER 85 [2008] PIER 84 [2008] PIER 83 [2008] PIER 82 [2008] PIER 81 [2008] PIER 80 [2008] PIER 79 [2008] PIER 78 [2008] PIER 77 [2007] PIER 76 [2007] PIER 75 [2007] PIER 74 [2007] PIER 73 [2007] PIER 72 [2007] PIER 71 [2007] PIER 70 [2007] PIER 69 [2007] PIER 68 [2007] PIER 67 [2007] PIER 66 [2006] PIER 65 [2006] PIER 64 [2006] PIER 63 [2006] PIER 62 [2006] PIER 61 [2006] PIER 60 [2006] PIER 59 [2006] PIER 58 [2006] PIER 57 [2006] PIER 56 [2006] PIER 55 [2005] PIER 54 [2005] PIER 53 [2005] PIER 52 [2005] PIER 51 [2005] PIER 50 [2005] PIER 49 [2004] PIER 48 [2004] PIER 47 [2004] PIER 46 [2004] PIER 45 [2004] PIER 44 [2004] PIER 43 [2003] PIER 42 [2003] PIER 41 [2003] PIER 40 [2003] PIER 39 [2003] PIER 38 [2002] PIER 37 [2002] PIER 36 [2002] PIER 35 [2002] PIER 34 [2001] PIER 33 [2001] PIER 32 [2001] PIER 31 [2001] PIER 30 [2001] PIER 29 [2000] PIER 28 [2000] PIER 27 [2000] PIER 26 [2000] PIER 25 [2000] PIER 24 [1999] PIER 23 [1999] PIER 22 [1999] PIER 21 [1999] PIER 20 [1998] PIER 19 [1998] PIER 18 [1998] PIER 17 [1997] PIER 16 [1997] PIER 15 [1997] PIER 14 [1996] PIER 13 [1996] PIER 12 [1996] PIER 11 [1995] PIER 10 [1995] PIER 09 [1994] PIER 08 [1994] PIER 07 [1993] PIER 06 [1992] PIER 05 [1991] PIER 04 [1991] PIER 03 [1990] PIER 02 [1990] PIER 01 [1989]
2011-10-27
A Compact Bandstop Filter Based on Two Meandered Parallel-Coupled Lines
By
Progress In Electromagnetics Research, Vol. 121, 271-279, 2011
Abstract
In this paper, a compact wideband high-rejection microstrip bandstop filter using two meandered parallel-coupled lines of different electrical lengths and characteristic impedances in shunt is presented. The transmission and reflection zeros of the filter can be controlled through analytical equations and rulers given. Using this signal interferences technology, this filter obtains a low insertion loss and sharp rejection. Bandwidth and rejection level of the filters of this bandstop filter can be designed by choosing different even- and odd-mode characteristic impedances values of the coupled lines. According to the transmission zeros number, two types of filters are shown in the paper. To validated this topology, a wideband bandstop filter with a 3 dB cutoff frequency bandwidth of 92% centered at 2.6 GHz with sharp rejection characteristics is built to verify the theoretical prediction. The measured frequency response of the filter agrees excellently with the predicted result.
Citation
Dongnuan Cui, Yuan'an Liu, Yongle Wu, Shulan Li, and Cuiping Yu, "A Compact Bandstop Filter Based on Two Meandered Parallel-Coupled Lines," Progress In Electromagnetics Research, Vol. 121, 271-279, 2011.
doi:10.2528/PIER11061902
References

1. Yu, W.-H., J.-C. Mou, X. Li, and X. Lv, "A compact filter with sharp-transition and wideband-rejection using the novel defected ground structure," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 2-3, 329-340, 2009.

2. Wang, J.-P., L. Wang, Y.-X. Guo, Y. X. Wang, and D.-G. Fang, "Miniaturized dual-mode bandpass filter with controllable harmonic response for dual-band applications," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 11-12, 1525-1533, 2009.

3. Yang, M. H., J. Xu, Q. Zhao, and X. Sun, "Wide-stopband and miniaturized lowpass filters using SIRs-loaded hairpin resonators," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 17-18, 2385-2396, 2009.

4. Dai, G.-L. and M.-Y. Xia, "An investigation of quarterwavelength square-spiral resonator and its applications to miniaturized bandpass filters," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 10, 1303-1313, 2010.

5. Lin, H.-J., X.-Q. Chen, X.-W. Shi, L. Chen, and C.-L. Li, "A dual passband filter using hybrid microstrip open loop resonators and coplanar waveguide slotline resonators," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 1, 141-149, 2010.

6. Chen, H., Y.-H. Wu, Y.-M. Yang, and Y.-X. Zhang, "A novel and compact bandstop filter with folded microstrip/CPW hybrid structure," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 1, 103-112, 2010.

7. Wu, Y., Y. Liu, S. Li, and C. Yu, "A new wide-stopband low-pass ¯lter with generalized coupled-line circuit and analytical theory," Progress In Electromagnetics Research, Vol. 116, 553-567, 2011.

8. Matthaei, G. L., L. Oung, and E. M. T. Jones, Microwave Filters, Impedance Matching Networks and Coupling Structures, McGraw Hill, New York, 1964.

9. Hong, J. S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Wiley, New York, 2001.

10. Tu, W.-H. and K. Chang, "Compact microstrip bandstop filter using open stub and spurline," IEEE Microw. Wirel. Compon. Lett., Vol. 15, No. 4, 268-270, 2005.

11. Woo, D.-J., T.-K. Lee, et al. "Novel U-slot and V-slot DGSs for bandstop filter with Improved Q factor," IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 6, 2840-2847, 2006.

12. Hsieh, M.-Y. S. and M.Wang, "Compact and wideband microstrip bandstop filter," IEEE Microw. Wirel. Compon. Lett., Vol. 15, No. 7, 472-474, 2005.

13. Mandal, M. K., K. Divyabramham, et al. "Compact, wideband bandstop filters with sharp rejection characteristic," IEEE Microw. Wirel. Compon. Lett., Vol. 18, No. 10, 665-667, 2008.

14. Sánchez-Soriano, M. Á., E. Bronchalo, et al. "Compact UWB bandpass filter based on signal interference techniques," IEEE Transactions on Microwave Theory and Techniques, Vol. 19, No. 11, 92-694, 2009.

15. Mandal, M. K., V. K. Velidi, et al. "Design of ultra-wideband bandstop filter with three transmission zeros," Microw. Opt. Technol. Lett., Vol. 50, No. 11, 2955-2957, 2008.

16. Zysman, G. I. and A. Kent Johnson, "Coupled transmission line networks in an Inhomogeneous dielectric medium," IEEE Transactions on Microwave Theory and Techniques, Vol. 17, No. 10, 753-758, 1969.

17. Pozar, D. M., Microwave Engineering, 2nd Ed., Wily, New York, 1998.