volume | PIER Journals

Abstract

An improved CPW-fed configurations with dual-mode double-square-ring resonators (DMDSRR) for tri-band application is proposed in this paper. The resonant frequency equations related to DMDSRR geometry are introduced for simply designing tri-band bandpass filter (BPF). Resonant frequencies and transmission zeroes can be controlled by tuning the perimeter ratio of the square rings. To obtain lower insertion loss, higher out-of-band rejection level and wider bandwidth of tri-band, the improved coplanar waveguide (CPW) fed and the step impedance resonator (SIR) and meander line dual-mode perturbations are designed. The effective design procedure is provided. The proposed filter is successfully simulated and measured. It can be applied to WLAN (2.45, 5.20 and 5.80 GHz) and WiMAX (3.50 GHz) systems.

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

2. Zhang, L., Z. Y. Yu, and S. G. Mo, "Dual-mode dual-band bandpass filter using an open-loop resonator," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 11-12, 1603-1609, 2009. Google Scholar

3. 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 Google Scholar

4. 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 Google Scholar

5. Zhao, H. and T. J. Cui, "Novel triple-mode resonators using split-ring resonator," Microwave Opt. Technol Lett., Vol. 49, No. 12, 2918-2922, May 2007.
doi:10.1002/mop.22955 Google Scholar

6. Mokhtaari, M., J. Bomemana, K. Rambabu, and S. Amari, "Coupling matrix design of dual and triple passband filters," IEEE Trans. Microwave Theory Tech., Vol. 54, No. 11, 3940-3945, Nov. 2006.
doi:10.1109/TMTT.2006.884687 Google Scholar

7. Lee, J. and K. Sarabandi, "Design of triple-passband microwave filters using frequency transformations," IEEE Trans. Microwave Theory Tech., Vol. 56, No. 1, 187-193, Jan. 2008.
doi:10.1109/TMTT.2007.912206 Google Scholar

8. Chen, F. C., Q. X. Chu, and Z. H. Tu, "Tri-band bandpass filter using stub loaded resonators," Electronics Letters, Vol. 44, No. 12, 747-749, Jun. 2008.
doi:10.1049/el:20081054 Google Scholar

9. Chen, C. F., T. Y. Huang, and R. B. Wu, "Design of dual- and triple-passband filters using alternately cascaded multiband resonators," IEEE Trans. Microwave Theory Tech., Vol. 54, No. 9, 3550-3558, Sep. 2006.
doi:10.1109/TMTT.2006.880653 Google Scholar

10. Lee, C. H., C. I. G. Hsu, and H. K. Jhuang, "Design of a new tri-band microstrip BPF using combined quarter-wavelength SIRs," IEEE Microw. Wireless Compon. Lett., Vol. 16, No. 11, 594-596, Nov. 2006.
doi:10.1109/LMWC.2006.884902 Google Scholar

11. Chu, Q. X. and X. M. Lin, "Advanced triple-band bandpass filter using tri-section SIR," Electronics Lett., Vol. 44, No. 4, 295-296, Feb. 2008.
doi:10.1049/el:20083096 Google Scholar

12. Hsu, C. I. G., C. H. Lee, and Y. H. Hsieh, "Tri-band bandpass filter with sharp passband skirts designed using tri-section SIRs," IEEE Trans. Microwave Theory Tech., Vol. 18, No. 1, 19-21, Jan. 2008. Google Scholar

13. Chen, F. C. and Q. X. Chu, "Design of compact tri-band bandpass filters using assembled resonators," IEEE Trans. Microwave Theory Tech., Vol. 57, No. 1, 165-171, Jan. 2009.
doi:10.1109/TMTT.2008.2008963 Google Scholar

14. Chu, Q. X., F. C. Chen, Z. Tu, and H. Wang, "A novel crossed resonator and its applications to bandpass filters," IEEE Trans. Microwave Theory Tech., Vol. 57, No. 7, 1753-1759, Jul. 2009. Google Scholar

15. Chen, B. J., T. M. Shen, and R. B. Wu, "Design of tri-band filters with improved band allocation," IEEE Trans. Microwave Theory Tech., Vol. 57, No. 7, 1790-1797, Jul. 2009.
doi:10.1109/TMTT.2009.2022888 Google Scholar

16. Zhang, X. Y., Q. Xue, and B. J. Hu, "Planar tri-band bandpass filter with compact size," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 5, 262-264, May 2010.
doi:10.1109/LMWC.2010.2045583 Google Scholar

17. Ren, L. Y., "Tri-band bandpass filters based on dual-plane microstrip/dgs slot structure," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 8, 429-431, Aug. 2010.
doi:10.1109/LMWC.2010.2049348 Google Scholar

18. Lai, X., C. H. Liang, H. Di, and B. Wu, "Design of triband filter based on stub loaded resonator and DGS resonator," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 5, 265-267, May 2010.
doi:10.1109/LMWC.2010.2045584 Google Scholar

19. Lin, X. M., "Design of compact tri-band bandpass filter using λ/4 and stub-loaded resonators ," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 14-15, 2029-2035, 2010. Google Scholar

20. Hsu, C. I. G., C. H. Lee, and H. K. Jhuang, "Design of a novel quad-band microstrip BPF using quarter-wavelength stepped-impedance resonators," Microw. J., Vol. 50, No. 2, 102-112, Feb. 2007. Google Scholar

21. Liu, J. C., J. W. Wang, B. H. Zeng, and D. C. Chang, "CPW-fed dual-mode double-square-ring resonators for quad-band filters," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 3, 142-144, Mar. 2010.
doi:10.1109/LMWC.2010.2040211 Google Scholar

22. Weng, R. M. and P. Y. Hsiao, "Double-layered quad-band bandpass filter for multi-band wireless systems," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 16, 2153-2161, 2009.
doi:10.1163/156939309790109324 Google Scholar

23. Chang, K. and L. H. Hsieh, Microwave Ring Circuits and Related Structures, John Wiley & Sons, Inc., New Jersey, 2004.

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

Dr. Chin-Yen Liu

Dr. Bing-Hao Zeng

Prof. Ji-Chyun Liu

Prof. Chih-Chiang Chen

Dr. Dau-Chyrh Chang