volume | PIER Journals

Abstract

A bandstop filter with reconfigurable two-state center frequency and bandwidth is presented. The prototype of the proposed reconfigurable bandstop filter consists of one section of anti-coupled line short-circuited by an open low-impedance line. By introducing PIN diodes, this bandstop filter exhibits a lower stopband response centered at a lower frequency in the ON state, and a wider stopband response centered at a higher frequency in the OFF state. Filter using the proposed structure is designed, simulated and measured. The results confirm the designing method by showing a narrow stopband with the center frequency of 1 GHz and a wide stopband of 2.9 GHz bandwidth centered at 2.5 GHz respectively.

1. Mandal, M. K. and P. Mondal, "Design of sharp-rejection, compact, wideband bandstop filters," IET Microw. Antennas Propag., Vol. 2, No. 4, 389-393, 2008.
doi:10.1049/iet-map:20070212

2. Yang, M. H., J. Xu, Q. Zhao, L. Peng, and G. Li, "Compact, broad-stopband lowpass filters using sirs-loaded circular hairpin resonators," Progress In Electromagnetics Research, Vol. 102, 95-106, 2010.
doi:10.2528/PIER09120901

3. Hang, C. Y., W. R. Deal, T. Qian, and T. Itoh, "High efficiency transmitter front-ends integrated with planar an PBG," Asia-Pacific Microwave Conf. Dig., 888-894, Dec. 2000.

4. Yang, F. R., K. P. Ma, Y. X. Qian, and T. Itoh, "A uniplanar compact photonic-bandgap (UC-PBG) structure and its applications for microwave circuit," IEEE Trans. Micro. Theory Tech., Vol. 47, No. 8, 1509-151, 1999.
doi:10.1109/22.780402

5. Zhou, J. M., L.-H. Zhou, H. Tang, Y.-J. Yang, J.-X. Chen, and Z.-H. Bao, "Novel compact microstrip lowpass filters with wide stopband using defected ground structure," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 7, 1009-1019, 2011.
doi:10.1163/156939311795253984

6. Chen, X.-Q., X.-W. Shi, Y.-C. Guo, and M.-X. Xiao, "A novel dual band transmitter using microstrip defected ground structure," Progress In Electromagnetics Research, Vol. 83, 1-11, 2008.
doi:10.2528/PIER08041503

7. Wu, G.-L., W. Mu, X.-W. Dai, and Y.-C. Jiao, "Design of novel dual-band bandpass filter with microstrip meander-loop resonator and CSRR DGS," Progress In Electromagnetics Research, Vol. 78, 17-24, 2008.
doi:10.2528/PIER07090301

8. Chen, J., Z.-B.Weng, Y.-C. Jiao, and F.-S. Zhang, "Lowpass filter design of hilbert curve ring defected ground structure," Progress In Electronmagnetics Research, Vol. 70, 269-280, 2007.
doi:10.2528/PIER07012603

9. Gomez-Garcia, R. and J. I. Alonso, "Design of sharp-rejection and low-loss wide-band planar filters using signal-interference techniques," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 8, 530-532, 2005.
doi:10.1109/LMWC.2005.852797

10. Mandal, M. K. and S. Sanyal, "Compact bandstop filter using signal interference technique," IET Electron. Lett., Vol. 43, No. 2, 110-111, 2007.
doi:10.1049/el:20072547

11. Safwat, A. M. E., F. Podevin, P. Ferrari, and A. Vilcot, "Tunable band-stop defected ground structure resonator using reconfigurable dumbbell-shaped coplanar waveguide," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 9, 3559-3564, Sep. 2006.
doi:10.1109/TMTT.2006.880654

12. Rauscher, C., "Reconfigurable bandpass filter with a three-to-one switchable passband width," IEEE Trans. Microw. Theory Tech., Vol. 51, No. 2, 573-577, Feb. 2003.
doi:10.1109/TMTT.2002.807818

13. Lugo, C. and J. Papapolymerou, "Electronic switchable bandpass filter using PIN diodes for wireless low cost system-on-a-package applications," Proc. Inst. Elect. Eng., Vol. 151, No. 6, 497-502, Dec. 2004.

14. Fallahzadeh, S. and M. Tayarani, "A compact microstrip bandstop filter," Progress In Electromagnetics Research Letters, Vol. 11, 167-172, 2009.
doi:10.2528/PIERL09082407

15. Han, S. H., 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

16. Hsieh, M. and S. Wang, "Compact and wideband microstrip bandstop filter," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 7, 472-474, Jul. 2005.
doi:10.1109/LMWC.2005.851572

17. Wang , S.-N. and N.-W. Chen, "Compact, ultra-broadband coplanar-waveguide bandpass filter with excellent stopband rejection," Progress In Electromagnetics Research B, Vol. 17, 15-28, 2009.
doi:10.2528/PIERB09071008

18. Falcone, F., et al. "Effective negative-epsilon stopband microstrip lines based on complementary split ring resonators," IEEE Microwave and Wireless Components Letters, Vol. 14, 280-282, 2004.
doi:10.1109/LMWC.2004.828029

19. Zhang, S., et al. "Novel microstrip band-stop filters based on complementary split ring resonators," Microwave Journal, Vol. 49, 2006.

20. La, D., et al. "A novel compact bandstop filter using defected microstrip structure," Microwave and Optical Technology Letters, Vol. 53, 433-435, 2011.
doi:10.1002/mop.25708

21. Brito-Brito, Z., et al. "Precise frequency and bandwidth control of microstrip switchable bandstop filters," Microwave and Optical Technology Letters, Vol. 51, No. 11, 2573-2578, Nov. 2009.
doi:10.1002/mop.24679

22. Brito-Brito, Z., et al. "Microstrip switchable bandstop filter using PIN diodes with precise frequency and bandwidth control," Proceedings of the 38th European Microwave Conference, EuMC 2008, 1707-1710, 2008.
doi:10.1109/EUMC.2008.4751804

23. Naglich, E. J., et al. "High-Q tunable bandstop filters with adaptable bandwidth and pole allocation," IEEE MTT-S International Microwave Symposium Digest, 1-4, 2011.

24. Guyette, A. C., "Varactor-tuned bandstop filters with tunable center frequency and bandwidth," 2010 IEEE International Conference on Wireless Information Technology and Systems ICWITS, 1-4, 2010.
doi:10.1109/ICWITS.2010.5611960

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

Dr. Kai-Yu Zhao

Dr. Lin Li

Dr. Qing-Hua Wu

Dr. Weiqiang Xu

Dr. Ya-Ming Wang