volume | PIER Journals

Abstract

In this paper, a novel compact quadruplexer is implemented by using slotline stepped impedance stub loaded resonators (SISLRs) in ground plane. Four folded dual-mode slotline SISLRs with one input and four output coupled line structures are designed at different frequencies for the quadruplexer operation. By properly adjusting the geometrical parameters of a single dual-mode slotline SISLR, its first two resonant frequencies can be controlled, and thus it can be utilized to implement a second-order bandpass filter when these resonant frequencies are suitably assigned. Furthermore, because the proposed quadruplexer utilizes the distributed coupling technique, a small circuit size can be obtained. As a result, the proposed quadruplexer occupies an extremely small area, i.e., 0.22λ₀ × 0.25 λ₀(0.36λ_g × 0.41λ_g). Finally, good agreement between measurement and EM simulation verifies the design method successfully.

1. Deng, P.-H., M.-I. Lai, S.-K. Jeng, and C.-H. Chen, "Design of matching circuits for microstrip triplexers based on stepped-impedance resonators," IEEE Trans. on Microw. Theory and Tech., Vol. 54, No. 12, 4185-4192, Dec. 2006.
doi:10.1109/TMTT.2006.886161 Google Scholar

2. Tang, C.-W. and S.-F. You, "Design methodologies of LTCC bandpass filters, diplexer, and triplexer with transmission zeros," IEEE Trans. on Microw. Theory and Tech., Vol. 54, No. 2, 717-723, Feb. 2006.
doi:10.1109/TMTT.2005.862638 Google Scholar

3. Yang, M. H., J. Xu, Q. Zhao, and X. Sun, "Wide-stopband and miniaturized lowpass filters using SIRs-loaded hairpin resonators," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 17-18, 2385-2396, 2009.
doi:10.1163/156939309790416152 Google Scholar

4. Yang, R.-Y., C.-M. Hsiung, C.-Y. Hung, and C.-C. Lin, "A high performance bandpass filter with a wide and deep stopband by using square stepped impedance resonators," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 11-12, 1673-1683, 2010.
doi:10.1163/156939310792149722 Google Scholar

5. Yang, R.-Y., C.-M. Hsiung, C.-Y. Hung, and C.-C. Lin, "Design of a high band isolation diplexer for GPS and WLAN system using modified stepped-impedance resonators," Progress In Electromagnetics Research, Vol. 107, 101-114, 2010.
doi:10.2528/PIER10060913 Google Scholar

6. He, Z. R., X. Q. Lin, and Y. Fan, "Improved stepped-impedance resonator (SIR) bandpass filter in Ka-band," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 8-9, 1181-1190, 2009. Google Scholar

7. Goron, E., J.-P. Coupez, C. Person, Y. Toutain, H. Lattard, and F. Perrot, "Accessing to UMTS filtering specifications using new microstrip miniaturized loop-filters ," IEEE MTT-S Int. Microw. Symp. Dig., 1599-1602, Jun. 2003. Google Scholar

8. Lee, G.-A., M. Megahed, and F.-D. Flaviis, "Design of multilayer spiral inductor resonator filter and diplexer for system-in-a-package," IEEE MTT-S Int. Microw. Symp. Dig., 527-530, Jun. 2003. Google Scholar

9. Huang, C.-Y., M.-H. Weng, C.-S. Ye, and Y.-X. Xu, "A high band isolation and wide stopband diplexer using dual-mode stepped-impedance resonators," Progress In Electromagnetics Research, Vol. 100, 299-308, 2010.
doi:10.2528/PIER09112701 Google Scholar

10. Deng, P. H., C. H. Wang, and C. H. Chen, "Compact microstrip diplexers based on a dual-passband filter," Pro. Asia-Pacific Microw. Conf., 1228-1232, 2006.

11. Chen, C.-F., T.-Y. Huang, T.-M. Shen, and R.-B. Wu, "A miniaturized microstrip common resonator triplexer without extra matching network ," Proc. Asia-Pacific Microw. Conf., 1439-1442, 2006.

12. Wu, H.-W., K. Shu, M.-H. Weng, J.-R. Chen, and Y.-K. Su, "Design of a compact microstrip triplexer for multiband applications," Proc. Eur. Microw. Conf., 834-837, 2007. Google Scholar

13. Chen, C.-F., T.-Y. Huang, C.-P. Chou, and R.-B.Wu, "Microstrip diplexer design with common resonator section for compact size but high isolation," IEEE Trans. on Microwave Theory and Tech., Vol. 54, No. 5, 1945-1952, 2006.
doi:10.1109/TMTT.2006.873613 Google Scholar

14. Deng, P.-H., M.-I. Lai, S.-K. Jeng, and C.-H. Chen, "Design of matching circuits for microstrip triplexers based on stepped-impedance resonators," IEEE Trans. on Microwave Theory and Tech., Vol. 54, No. 12, 4185-4192, 2006.
doi:10.1109/TMTT.2006.886161 Google Scholar

15. Hong, S. and K. Chang, "A 10-35 GHz six-channel microstrip multiplexer for wide-band communication systems," IEEE Trans. on Microwave Theory and Tech., Vol. 54, No. 4, 1370-1378, 2006.
doi:10.1109/TMTT.2006.871912 Google Scholar

16. Chen, J.-Z., N. Wang, K. Deng, and S. Yang, "Design of compact quadruplexer based on defected stepped impedance resonators," Progress In Electromagnetics Research, Vol. 119, 19-33, 2011.
doi:10.2528/PIER11061301 Google Scholar

17. Wu, J.-Y., K.-W. Hsu, Y.-H. Tseng, and W.-H. Tu, "High-isolation microstrip triplexer using multiple-mode resonators," IEEE Microw. Wireless Compon. Lett., Vol. 22, No. 4, 206-208, Apr. 2012.
doi:10.1109/LMWC.2012.2189101 Google Scholar

18. Shi, J., J.-X. Chen, and Z.-H. Bao, "Diplexer based on microstrip line resonators with loaded elements," Progress In Electromagnetics Research, Vol. 115, 423-439, 2011. Google Scholar

19. Zhang, Y.-L., T. Su, B. Wu, J. Chen, and C.-H. Liang, "A modified cauchy method suitable for duplexer and triplexer rational models extraction ," Progress In Electromagnetics Research Letters, Vol. 29, 201-211, 2012.
doi:10.2528/PIERL11121209 Google Scholar

20. Wang, R., J. Xu, M.-Y. Wang, and Y.-L. Dong, "Synthesis of microwave resonator diplexers using linear frequency transformation and optimization," Progress In Electromagnetics Research, Vol. 124, 441-455, 2012.
doi:10.2528/PIER12011108 Google Scholar

21. Skaik, T., "Novel star-junction coupled-resonator multiplexer structures," Progress In Electromagnetics Research Letters, Vol. 31, 113-120, 2012.
doi:10.2528/PIERL12030114 Google Scholar

22. Jarauta, E., F. J. Falcone, M. Beruete, and J. Illescas, "Duplexers and multiplexers based on microstrip line loaded with complementary split ring resonators," Progress In Electromagnetics Research Letters, Vol. 27, 9-16, 2011.
doi:10.2528/PIERL11080107 Google Scholar

23. Jayatilaka, H. C., D. M. Klymyshyn, M. Börner, and J. Mohr, "Compact thick metal diplexer with multi-coupled folded half wavelength resonators," Progress In Electromagnetics Research C, Vol. 18, 1-8, 2011. Google Scholar

24. Han, S., X. L.Wang, Y. Fan, Z. Yang, and Z. He, "The generalized Chebyshev substrate integrated waveguide diplexer," Progress In Electromagnetics Research, Vol. 73, 29-38, 2007.
doi:10.2528/PIER07032002 Google Scholar

25. Ruiz-Cruz, J. A., J. R. Montejo-Garai, J. M. Rebollar, and S. Sobrino, "Compact full Ku-band triplexer with improved E-plane power divider," Progress In Electromagnetics Research, Vol. 86, 39-51, 2008.
doi:10.2528/PIER08082803 Google Scholar

26. Ma, D.-C., Z.-Y. Xiao, L.-L. Xiang, X.-H. Wu, C.-Y. Huang, and X. Kou, "Compact dual-band bandpass filter using folded SIR with two stubs for WLAN ," Progress In Electromagnetics Research, Vol. 117, 357-364, 2011. Google Scholar

27. Chen, C.-H., C.-S. Shih, T.-S. Horng, and S.-M. Wu, "Very miniature dual-band and dual-mode bandpass filter designs on an integrated passive device chip ," Progress In Electromagnetics Research, Vol. 119, 461-476, 2011.
doi:10.2528/PIER11080105 Google Scholar

28. Guan, X., B. Wang, X. Wang, S. Wang, and H.-W. Liu, "A novel dual-mode bandpass filter using stub-loaded defected ground open-loop resonator ," Progress In Electromagnetics Research Letters, Vol. 26, 31-37, 2011.
doi:10.2528/PIERL11071402 Google Scholar

29. 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 Google Scholar

Dr. Zhi-Peng Li

Dr. Li-Juan Zhang

Dr. Tao Su

Professor Chang-Hong Liang