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 Google Scholar

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 Google Scholar

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. Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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. Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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

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 Google Scholar

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 Google Scholar

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 Google Scholar

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. Google Scholar

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 Google Scholar

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

Dr. Kai-Yu Zhao

Dr. Lin Li

Dr. Qing-Hua Wu

Dr. Weiqiang Xu

Dr. Ya-Ming Wang