volume | PIER Journals

Abstract

A novel dual-mode double square loop resonator (DMDSLR) for dual-band band-pass filter (BPF) is presented in this paper. The simple meander loop in DMDSLR is studied to improve the performance of the conventional DMDSLR. Significant size reductions over 33% are achieved. In addition, the designed meander-loop DMDSLR filter shows lower insertion loss (2.24 and 2.28 dB), higher rejection level (28/56 dB and 53/36 dB), wider bandwidth (about 8.5% and 28%) at the 2.47 and 5.47 GHz bands, respectively. Two transmission zeros are placed between the two pass-bands and result in a good isolation.

1. Wolff, I., "Microstrip bandpass filter using degenerate modes of a microstrip ring resonator," Electron. Lett., Vol. 8, No. 12, 302-303, Jun. 1972.
doi:10.1049/el:19720223

2. Liu, J. C., P. C. Lu, C. H. Shie, C. S. Cheng, and L. Yao, "Dual-mode double-ring resonator for microstrip band-pass filter applications," IEE Proc. Microwave Antennas Propagation, Vol. 151, No. 5, 430-434, Oct. 2004.
doi:10.1049/ip-map:20040725

3. Soong, T. W., J. C. Liu, C. H. Shie, and C. Y.Wu, "Modified dual-mode double-ring resonators for wide band-pass filter design," IEE Proc. Microwave Antennas Propagation, Vol. 152, No. 4, 245-250, Aug. 2005.
doi:10.1049/ip-map:20045072

4. Lin, Y. K., Z. C. Yang, J. C. Liu, and T. W. Soong, "Miniaturized dual-mode double-ring resonator with shunt-capacitance perturbations for band-pass filter applications," National Symposium on Telecommunications, 2006.

5. Lei, M. F. and H. Wang, "An analysis of miniaturized dual-mode bandpass filter structure using shunt-capacitance perturbation," IEEE Trans. Microwave Theory and Tech., Vol. 53, No. 3, 861-867, Mar. 2005.
doi:10.1109/TMTT.2004.842504

6. Mao, R. J., X. H. Tang, and F. Xiao, "Miniaturized dual-mode ring bandpass filters with patterned ground plane," IEEE Trans. Microwave Theory and Tech., Vol. 55, No. 7, 1539-1547, Jul. 2007.
doi:10.1109/TMTT.2007.900337

7. Dai, X. W., C. H. Liang, and Z. X. Chen, "Novel dual-mode dual-band bandpass filter using nested microstrip meander-loop resonators," Microwave Opt. Tech. Lett., Vol. 50, No. 3, 863-868, Mar. 2008.
doi:10.1002/mop.23199

8. Chen, C. H., H. M. Chen, Y. F. Lin, and C. F. Yang, "Miniaturized dual-mode bandpass filter using meander square-ring resonator," Microwave Opt. Tech. Lett., Vol. 50, No. 8, 2117-2119, Aug. 2008.
doi:10.1002/mop.23578

9. Chiou, Y. C., C. Y. Wu, and J. T. Kuo, "New miniaturized dual-mode dual-band ring resonator bandpass filter with microwave C-sections," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 2, 67-69, Feb. 2010.
doi:10.1109/LMWC.2009.2038432

10. Gorur, A. and C. Karpuz, "Miniature dual-mode microstrip filters," IEEE Microw. Wireless Compon. Lett., Vol. 17, No. 1, 37-39, Jan. 2007.
doi:10.1109/LMWC.2006.887249

11. Wu, S., M. H. Weng, S. B. Jhong, and M. S. Lee, "A novel crossed slotted patch dual-mode bandpass filter with two transmission zeros," Microwave Opt. Tech. Lett., Vol. 50, No. 3, 741-744, Aug. 2008.
doi:10.1002/mop.23219

12. Sung, Y., "Dual-mode dual-band filter with band notch structures," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 2, 73-75, Feb. 2010.
doi:10.1109/LMWC.2009.2038434

13. Lin, Y. F., C. H. Chen, K. Y. Chen, H. M. Chen, and K. L. Wong, "A miniature dual-mode bandpass filter using Al2O3 substrate," IEEE Microw. Wireless Compon. Lett., Vol. 17, No. 8, 580-582, Aug. 2007.
doi:10.1109/LMWC.2007.901766

14. Banciu, M. G., A. Loachim, R. Ramer, N. Militaru, and G. Lojewski, "Couplings control in a compact microstrip dual-mode resonator," Microwave Opt. Tech. Lett., Vol. 49, No. 9, 2290-2295, Sep. 2007.
doi:10.1002/mop.22722

15. Hong, J. S., H. Shaman, and Y. H. Chun, "Dual-mode microstrip open-loop resonators and filters," IEEE Trans. Microwave Theory and Tech., Vol. 55, No. 8, 1764-1770, Aug. 2007.
doi:10.1109/TMTT.2007.901592

16. Wang, Y. Z. and M. L. Her, "Miniaturised dual-mode microstrip bandpass filters with wide upper stopband," IEE Proc. Microwave Antennas Propagation, Vol. 1, No. 4, 904-910, Aug. 2007.
doi:10.1049/iet-map:20060322

17. Liu, J. C., P. C. Lu, J. M. Chang, C. H. Chien, and C. P. Kuei, "Novel dual-mode square-loop resonators using Hilbert perturbation for simultaneous size reduction and mode splitting," Microwave Opt. Tech. Letters, Vol. 49, No. 7, 1735-1739, Jul. 2007.
doi:10.1002/mop.22503

18. Kang, W., W. Hong, and J. Y. Zhou, "Performance improvement and size reduction of microstrip dual-mode bandpass filter," Electron. Lett., Vol. 44, No. 6, 421-422, Mar. 2008.
doi:10.1049/el:20080285

19. Chiou, Y. C., T. J. Kuo, and J. S. Wu, "Miniaturized dual-mode ring resonator bandpass filter with microstrip-to-CPW broadside-coupled structure," IEEE Microw. Wireless Compon. Lett., Vol. 18, No. 2, 97-99, Feb. 2008.
doi:10.1109/LMWC.2007.915036

20. Su, Y. K., J. R. Chen, M. H. Weng, and C. Y. Hung, "Design of miniature and harmonic control patch dual-mode bandpass filter with transmission zeros," Microwave Opt. Tech. Lett., Vol. 50, No. 8, 2161-2163, Aug. 2008.
doi:10.1002/mop.23604

21. Djoumessi, E. E. and K. Wu, "Multilayer dual-mode dual-bandpass filter," IEEE Microw. Wireless Compon. Lett., Vol. 19, No. 1, 21-23, Jan. 2009.
doi:10.1109/LMWC.2008.2008552

22. Zhou, M., X. Tang, and F. Xiao, "Miniature microstrip bandpass filter using resonator-embedded dual-mode resonator based on source-load coupling," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 3, 139-141, Mar. 2010.
doi:10.1109/LMWC.2010.2040210

23. Tsai, L. C. and C. W. Huse, "Dual-band bandpass filters using equal length coupled-serial-shunted lines and Z-transform techniques," IEEE Trans. Microwave Theory and Tech., Vol. 52, No. 4, 1111-1117, Apr. 2004.
doi:10.1109/TMTT.2004.825680

24. Kuo, J. T., T. H. Yeh, and C. C. Yeh, "Design of microstrip bandpass filters with a dual-passband response," IEEE Trans. Microwave Theory and Tech., Vol. 53, No. 4, 1331-1337, Apr. 2005.
doi:10.1109/TMTT.2005.845765

25. Huang, T. H., H. J. Chen, C. S. Chang, L. S. Chen, Y. H. Wang, and M. P. Houng, "A novel compact ring dual-mode filter with adjustable second-passband for dual-band applications," IEEE Microw. Wireless Compon. Lett., Vol. 16, No. 6, 360-362, Jun. 2006.
doi:10.1109/LMWC.2006.875607

26. Chen, J. X., T. Y. Yum, J. L. Li, and Q. Xue, "Dual-mode dual-band bandpass filter using stacked-loop structure," IEEE Microw. Wireless Compon. Lett., Vol. 16, No. 9, 502-504, Sep. 2006.
doi:10.1109/LMWC.2006.880705

27. Zhang, X. Y. and Q. Xue, "Novel dual-mode dual-band filters using coplanar-waveguide-fed ring resonators," IEEE Trans. Microwave Theory and Tech., Vol. 55, No. 10, 2183-2190, Oct. 2007.
doi:10.1109/TMTT.2007.906501

28. Wu, B., C. Liang, P. Qin, and Q. Li, "Compact dual-band filter using defected stepped impedance resonator," IEEE Microw. Wireless Compon. Lett., Vol. 18, No. 10, 674-676, Oct. 2008.
doi:10.1109/LMWC.2008.2003459

29. Luo, S. and L. Zhu, "A novel dual-mode dual-band bandpass filter based on a single ring resonator," IEEE Microw. Wireless Compon. Lett., Vol. 19, No. 8, 497-499, Aug. 2009.
doi:10.1109/LMWC.2009.2024826

30. Guo, L., Z.-Y. Yu, and L. Zhang, "Design of a dual-mode dual-band filter using stepped impedance resonators," Progress In Electromagnetics Research Letters, Vol. 14, 147-154, 2010.
doi:10.2528/PIERL10032601

31. Chiou, Y.-C., P.-S. Yang, J.-T. Kuo, and C.-Y.Wu, "Transmission zero design graph for dual-mode dual-band filter with periodic stepped-impedance ring resonator," Progress In Electromagnetics Research, Vol. 108, 23-36, 2010.
doi:10.2528/PIER10071608

32. Luo, S., L. Zhu, and S. Sun, "A dual-mode dual-band banspass filter using a single slot ring resonator," Progress In Electromagnetics Research Letters, Vol. 23, 173-180, 2011.

33. Chen, Z.-X., X.-W. Dai, and C.-H. Liang, "Novel dual-mode dual-band bandpass filter using double square-loop structure," Progress In Electromagnetics Research, Vol. 77, 409-416, 2007.
doi:10.2528/PIER07082803

34. , , , Zeland Software Inc., IE3D version 10.0, Jan. 2005.

Prof. Ji-Chyun Liu

Dr. Kuan-Dih Yeh

Dr. Chih-Chi Yen

Dr. Chin-Yen Liu

Dr. Bing-Hao Zeng

Prof. Chih-Chiang Chen