volume | PIER Journals

Abstract

A novel compact quadruplexer based on defected stepped impedance resonator (DSIR) with high isolation is presented in this paper. The proposed quadruplexer consists of a common input feeding line, four kinds of folded DSIRs and four individual output feeding lines. Considering the loading effect among channel filters, the input DSIRs must be properly located with respect to the common feeding line in order to realize all external quality factors at the same time, so that the loading effect becomes very small. Furthermore, since the compact DSIRs resonate at multiple fundamental frequencies, a high-isolation quadruplexer with size reduction can be obtained. A fabricated prototype of the proposed quadruplexer is developed. The channel performance obtained by measurement and EM simulation are in good agreement.

1. Lin, Y.-S., C.-C. Liu, K.-M. Li, and C.-H. Chen, "Design of an LTCC tri-band transceiver module for GPRS mobile applications," IEEE Trans. Microwave Theory Tech., Vol. 52, 2718-2724, 2004.
doi:10.1109/TMTT.2004.838292 Google Scholar

2. Jimenez Martin, J. L., V. Gonzalez-Posadas, J. E. GonzalezGarcia, F. J. Arques-Orobon, L. E. Garcia-Munoz, and D. Segovia-Vargas, "Dual band high efficiency class ce power amplifier based on CRLH diplexer," Progress In Electromagnetics Research, Vol. 97, 217-240, 2009.
doi:10.2528/PIER09071609 Google Scholar

3. Zewani, M. and I. C. Hunter, "Design of ring-manifold microwave multiplexers," IEEE MTT-S Int. Dig., 689-692, San Francisco, CA, Jun. 2006. Google Scholar

4. Deng, P.-H., N.-I. Lai, S.-K. Jeng, and C. H. Chen, "Design of matching circuits for microstrip triplexers based on stepped-impedance resonators," IEEE Trans. Microwave Theory Tech., Vol. 54, 4185-4192, 2006.
doi:10.1109/TMTT.2006.886161 Google Scholar

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

6. Yao, W. H., A. E. Abdelmonem, J. F. Liang, X. P. Liang, K. A. Zaki, and A. Martin, "Wide-band waveguide and ridge waveguide T-junctions for diplexer applications," IEEE Trans. Microwave Theory Tech., Vol. 41, 2166-2173, 1993.
doi:10.1109/22.260702 Google Scholar

7. 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

8. Chen, X.-W., W.-M. Zhang, and C.-H. Yao, "Design of microstrip diplexer with wide band-stop," International Conference on Microwave and Millimeter Wave Technology, 1-3, 2007.
doi:10.1109/ICMMT.2007.381284 Google Scholar

9. 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 modi¯ed Stepped-Impedance Resonators," Progress In Electromagnetics Research, Vol. 107, 101-114, 2010.
doi:10.2528/PIER10060913 Google Scholar

10. 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

11. 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. Google Scholar

12. 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

13. Yu, W.-H., J.-C. Mou, X. Li, and X. Lv, "A compact filter with sharp-transition and wideband-rejection using the novel defected ground structure ," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 2-3, 329-340, 2009.
doi:10.1163/156939309787604454 Google Scholar

14. Guo, Y. C., L. H. Weng, and X. W. Shi, "An improved microstrip open loop resonator bandpass filter with DGSS for WLAN application," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 4, 463-472, 2009.
doi:10.1163/156939309787612301 Google Scholar

15. 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

16. Deng, P. H., C. H. Wang, and C. H. Chen, "Compact microstrip diplexers based on a dual-passband filter," Proceedings of Asia-Pacific Microwave Conference, 2006.

17. 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.

18. 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-Paci¯c Microw. Conf., 1439-1442, 2006.
doi:10.1109/APMC.2006.4429677 Google Scholar

19. 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. Microwave Theory Tech., Vol. 54, 1945-1952, 2006.
doi:10.1109/TMTT.2006.873613 Google Scholar

20. Amari, S., "Synthesis of cross-coupled resonator filters using an analytical gradiant-based optimization technique," IEEE Trans. Microwave Theory Tech., Vol. 9, 1559-1564, 2000.
doi:10.1109/22.869008 Google Scholar

21. Huang, J.-Q., Q.-X. Chu, and C.-Y. Liu, "Compact UWB filter based on surface-coupled structure with dual notched bands," Progress In Electromagnetics Research, Vol. 106, 311-319, 2010.
doi:10.2528/PIER10062203 Google Scholar

22. Wei, F., L. Chen, Q.-Y. Wu, X.-W. Shi, and C.-J. Gao, "Compact UWB bandpass filter with narrow notch-band and wide stop-band," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 7, 911-920, 2010.
doi:10.1163/156939310791285155 Google Scholar

23. Hsiao, P.-Y. and R.-M. Weng, "Compact open-loop UWB filter with notched band," Progress In Electromagnetics Research Letters, Vol. 7, 149-159, 2009.
doi:10.2528/PIERL09022501 Google Scholar

24. Hong, J.-S. and M. J. Lancaster, Microstrip Filter for F/Microwave Applications, Wiley, New York, 2001.

Dr. Jian Zhong Chen

Dr. Nan Wang

Dr. Kun Deng

Dr. Shuai Yang