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Analog Integrated Circuits and Signal Processing

, Volume 98, Issue 2, pp 409–415 | Cite as

Design of a miniaturized microstrip diplexer using coupled lines and spiral structures for wireless and WiMAX applications

  • Abbas RezaeiEmail author
  • Leila Noori
  • Hossein Mohammadi
Article
  • 16 Downloads

Abstract

In this paper, a planar microstrip diplexer consisting of two resonators integrated by three coupled lines is presented. The proposed resonators are composed of coupled lines and microstrip spiral cells. The realized diplexer operates at 2.88 GHz for wireless and 3.29 GHz for WiMAX applications. To obtain a compact size, low insertion losses and tune the resonance frequencies a designing method is presented based on the analysis of scattering and Z parameters of the proposed resonator. The designed diplexer has a miniaturized size of 0.028 λ g 2 . Another advantage of the proposed structure is a significant improvement in the insertion losses at the both passbands so that they are 0.36 and 0.44 dB at 2.88 and 3.29 GHz respectively where the return losses at the both passbands are better than 23.7 dB. The designed diplexer is fabricated and measured. There is a good agreement between simulated and measured results, which validates the introduced methodology.

Keywords

Diplexer Insertion loss Microstrip Miniaturization Return loss 

References

  1. 1.
    Chen, D., Zhu, L., Bu, H., & Cheng, C. H. (2015). A novel planar diplexer using slot line-loaded microstrip ring resonator. IEEE Microwave and Wireless Components Letters, 25(11), 706–708.CrossRefGoogle Scholar
  2. 2.
    Peng, H., & Chiang, Y. (2015). Microstrip diplexer constructed with new types of dual-mode ring filters. IEEE Microwave and Wireless Components Letters, 25(1), 7–9.CrossRefGoogle Scholar
  3. 3.
    Huang, F., Wang, J., Zhu, L., & Wu, W. (2016). Compact microstrip balun diplexer using stub-loaded dual-mode resonators. Electronics Letters, 52(24), 1994–1996.CrossRefGoogle Scholar
  4. 4.
    Guan, X., Yang, F., Liu, H., & Zhu, L. (2014). Compact ad high-isolation diplexer using dual-mode stub-loaded resonators. IEEE Microwave and Wireless Components Letters, 24(6), 385–387.CrossRefGoogle Scholar
  5. 5.
    Xiao, J. K., Zhu, M., Li, Y., Tian, L., & Ma, J. G. (2015). High selective microstrip bandpass filter and diplexer with mixed electromagnetic coupling. IEEE Microwave and Wireless Components Letters, 25(12), 781–783.CrossRefGoogle Scholar
  6. 6.
    Duan, Q., Song, K., Chen, F., & Fan, Y. (2015). Compact wide-stopband diplexer using dual mode resonators. Electronics Letters, 51(14), 1085–1087.CrossRefGoogle Scholar
  7. 7.
    Feng, W., Hong, M., & Che, W. (2016). Microstrip diplexer design using open/shorted coupled lines. Progress In Electromagnetics Research Letters, 59, 123–127.CrossRefGoogle Scholar
  8. 8.
    Theerawisitpong, S., & Pinpathomrat, P. (2016). A Microstrip diplexer using folded single stepped impedance resonator for 3G microcell stations. International Journal of Information and Electronics Engineering, 6(3), 171–174.CrossRefGoogle Scholar
  9. 9.
    Chinig, A., Zbitou, J., Errkik, A., Elabdellaoui, L., Tajmouati, A., Tribak, A., et al. (2015). A new microstrip diplexer using coupled stepped impedance resonators. International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering, 9, 41–44.Google Scholar
  10. 10.
    Salehi, M. R., Keyvan, S., Abiri, E., & Noori, L. (2016). Compact microstrip diplexer using new design of triangular open loop resonator for 4G wireless communication systems. AEU: International Journal of Electronics and Communications, 70(7), 961–969.Google Scholar
  11. 11.
    Yang, F., Guan, X., Zhu, L., & Liu, H. (2014). Compact microstrip diplexer for 4G Wireless communication. Progress in Electromagnetics Research Symposium Proceedings, 25, 599–602.Google Scholar
  12. 12.
    Chinig, A., Zbitou, J., Errkik, A., Tajmouati, A., Abdellaoui, L. E., Latrach, M., et al. (2015). Microstrip diplexer using stepped impedance resonators. Journal of Infrared, Millimeter, and Terahertz Waves., 84, 2537–2548.Google Scholar
  13. 13.
    Noori, L., & Rezaei, A. (2017). Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components. International Journal of Microwave and Wireless Technologies, 9(7), 1467–1471.CrossRefGoogle Scholar
  14. 14.
    Noori, L., & Rezaei, A. (2017). Design of a microstrip diplexer with a novel structure for WiMAX and wireless applications. AEU-International Journal of Electronics and Communications, 77, 18–22.CrossRefGoogle Scholar
  15. 15.
    Rezaei, A., Noori, L., & Mohammadi, H. (2017). Design of a novel compact microstrip diplexer with low insertion loss. Microwave and Optical Technology Letters, 59(7), 1672–1676.CrossRefGoogle Scholar
  16. 16.
    Noori, L., & Rezaei, A. (2017). Design of a compact narrowband quad-channel diplexer for multi-channel long-range RF communication systems. Analog Integrated Circuits and Signal Processing, 94(1), 1–8.CrossRefGoogle Scholar
  17. 17.
    Noori, L., & Rezaei, A. (2017). Design of microstrip wide stopband quad-band bandpass filters for multi-service communication systems. AEU-International Journal of Electronics and Communications, 81, 136–142.CrossRefGoogle Scholar
  18. 18.
    Salehi, M., & Noori, L. (2014). Novel 2.4 GHz branch-line coupler using microstrip cells. Microwave and Optical Technology Letters, 56(9), 2110–2113.CrossRefGoogle Scholar
  19. 19.
    Hong, J. S., & Lancaster, M. J. (2001). Microstrip filters for RF/microwave applications. New York: Wiley. ISBN 978-1-118-00212-4.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electrical EngineeringKermanshah University of TechnologyKermanshahIran
  2. 2.KermanshahIran

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