PIER
 
Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 137 > pp. 585-597

NOVEL IN-LINE MICROSTRIP COUPLED-LINE BANDSTOP FILTER WITH SHARP SKIRT SELECTIVITY

By G. Liu and Y. Wu

Full Article PDF (877 KB)

Abstract:
This paper presents a novel design approach to design in-line microstrip bandstop filter with accurate design theory and sharp skirt selectivity. This kind of bandstop filter is based on a simple coupled-line structure, indicating compact and flexible circuit layout for microstrip implementation. For a single-section bandstop filter, the scattering parameters and their constrain conditions are achieved, which provides an effective design guide for multi-section bandstop filters. Theoretical analysis indicates that the even-mode and odd-mode characteristic impedances can be easily used to determine the desired bandstop performance while the total circuit layout keeps very compact. For demonstration, seven numerical examples are designed, calculated, and compared. Finally, both experimental and simulation results of a two-section two-cell microstrip bandstop filter operating at 1 GHz are presented to verify the theoretical predications.

Citation:
G. Liu and Y. Wu, "Novel in-Line Microstrip Coupled-Line Bandstop Filter with Sharp Skirt Selectivity," Progress In Electromagnetics Research, Vol. 137, 585-597, 2013.
doi:10.2528/PIER13011908
http://www.jpier.org/PIER/pier.php?paper=13011908

References:
1. Hong, J.-S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Chapters 2 and 6, Wiley, New York, 2001.
doi:10.1002/9780470937297

2. 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

3. Ning, H., J. Wang, Q. Xiong, and L.-F. Mao, "Design of planar dual and triple narrow-band bandstop filters with independently controlled stopbands and improved spurious response," Progress In Electromagnetics Research, Vol. 131, 259-274, 2012.

4. Cheng, D., H.-C. Yin, and H.-X. Zheng, "A compact dual-band bandstop filter with defected microstrip slot," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 10, 1374-1380, 2012.
doi:10.1080/09205071.2012.700262

5. Wang, J., H. Ning, Q. Xiong, M. Li, and L.-F. Mao, "A novel miniaturized dual-band bandstop filter using dual-plane defected structures," Progress In Electromagnetics Research, Vol. 134, 397-417, 2013.

6. Han, S., X.-L. Wang, and Y. Fan, "Analysis and design of multiple-band bandstop filters," Progress In Electromagnetics Research, Vol. 70, 297-306, 2007.
doi:10.2528/PIER07020903

7. Zhang, X.-Y., C.-H. Chan, Q. Xue, and B.-J. Hu, "RF tunable bandstop filters with constant bandwidth based on a doublet configuration," IEEE Transactions on Industrial Electronics, Vol. 59, No. 2, 1257-165, 2012.
doi:10.1109/TIE.2011.2158038

8. Ou, Y.-C. and G. M. Rebeiz, "Lumped-element fully tunable bandstop filters for cognitive radio applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 10, Part 1, 2461-2468, 2011.
doi:10.1109/TMTT.2011.2160965

9. Xiang, Q.-Y., Q.-Y. Feng, and X.-G. Huang, "A novel microstrip bandstop filter and its application to reconfigurable filter," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 8-9, 1039-1047, 2012.
doi:10.1080/09205071.2012.710365

10. Wu, Y., Y. Liu, S. Li, and C. Yu, "A simple microstrip bandpass filter with analytical design theory and sharp skirt selectivity," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 8-9, 1253-1263, 2011.
doi:10.1163/156939311795762060

11. Wu, Y., Y. Liu, S. Li, and S. Li, "A novel high-power amplifier using a generalized coupled-line transformer with inherent DC-block function," Progress In Electromagnetics Research, Vol. 119, 171-190, 2011.
doi:10.2528/PIER11050409

12. Cui, D., Y. Liu, Y. Wu, S. Li, and C. 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

13. Mandal, M. K., K. Divyabramham, and V. K. Velidi, "Compact wideband bandstop filter with five transmission zeros," IEEE Microwave and Wireless Components Letters, Vol. 22, No. 1, 4-6, 2012.
doi:10.1109/LMWC.2011.2173928

14. Qian, K. W. and X. H. Tang, "Compact bandstop filter using coupled-line section," Electronics Letters, Vol. 47, No. 8, 505-506, 2011.
doi:10.1049/el.2011.0107

15. Xiang, Q.-Y., Q.-Y. Feng, and X.-G. Huang, "Bandstop flter based on complementary split ring resonators defected microstrip structure," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 13, 1895-1908, 2011.
doi:10.1163/156939311797453999

16. Tang, W. and J.-S. Hong, "Coupled stepped-impedance-resonator bandstop filter," IET Microwaves, Antennas & Propagation, Vol. 4, No. 9, 1283-1289, 2010.
doi:10.1049/iet-map.2009.0419

17. Wu, Y. and Y. Liu, "A coupled-line band-stop filter with three-section transmission-line stubs and wide upper pass-band performance," Progress In Electromagnetics Research, Vol. 119, 407-421, 2011.
doi:10.2528/PIER11072003


© Copyright 2014 EMW Publishing. All Rights Reserved