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Wireless Personal Communications

, Volume 99, Issue 1, pp 497–507 | Cite as

High Performance Microstrip Low Pass Filter for Wireless Communications

  • Saeed RoshaniEmail author
  • Alireza Golestanifar
  • Amirhossein Ghaderi
  • Hesam Siahkamari
  • Derek Abbott
Article

Abstract

A microstrip low-pass filter using T-shaped resonators is designed to achieve an ultra-sharp transition band and high suppression level. The performance of the resonators is investigated based on an LC equivalent circuit and a transfer function to compute the equations of the transmission zeros. This filter has an acceptable stopband with high insertion loss (28 dB) by adopting a rectangular suppressor. Also, the width of the transition band is 0.09 GHz (with – 3 and − 40 dB attenuation levels), that exhibits a very high sharpness (ξ = 411 dB/GHz). The proposed filter with a 3 dB cut-off frequency (fc) of 1.32 GHz presents a high return loss in the passband (17 dB) and high figure of merit of 57,073. The designed filter is fabricated and measured, demonstrating sufficient agreement between the simulation and experimental results.

Keywords

T-shaped resonator LC equivalent circuit Microstrip filter Rectangular stub 

Notes

Acknowledgements

The authors would like to thank the Kermanshah Branch, Islamic Azad University for the financial support of this research project.

References

  1. 1.
    Hong, J. S., & Lancaster, M. J. (2001). Microstrip filters for RF/microwave applications. New York: Wiley.CrossRefGoogle Scholar
  2. 2.
    Liu, S., Xu, J., & Xu, Z. (2014). Compact lowpass filter with wide stopband using stepped impedance hairpin units. Electronics Letters, 51(1), 67–69.CrossRefGoogle Scholar
  3. 3.
    Li, Q., Zhang, Y., & Fan, Y. (2015). Compact ultra-wide stopband low pass filter using multimode resonators. Electronics Letters, 51(14), 1084–1085.MathSciNetCrossRefGoogle Scholar
  4. 4.
    Velidi, V. K., & Sanyal, S. (2011). Sharp roll-off lowpass filter with wide stopband using stub-loaded coupled-line hairpin unit. IEEE Microwave and Wireless Components Letters, 21(6), 301–303.CrossRefGoogle Scholar
  5. 5.
    Xiao, M., Sun, G., & Li, X. (2015). A lowpass filter with compact size and sharp roll-off. IEEE Microwave and Wireless Components Letters, 25(12), 790–792.CrossRefGoogle Scholar
  6. 6.
    Liu, S., Xu, J., & Xu, Z. (2015). Sharp roll-off lowpass filter using interdigital DGS slot. Electronics Letters, 51(17), 1343–1345.CrossRefGoogle Scholar
  7. 7.
    Wang, J. P., Ge, L., Guo, Y. X., & Wu, W. (2010). Miniaturised microstrip lowpass filter with broad stopband and sharp roll-off. Electronics Letters, 46(8), 573–575.CrossRefGoogle Scholar
  8. 8.
    Asadbeigi, H., & Virdee, B. S. (2015). Compact notch filter design using stepped impedance resonators for sharp roll-off and large wideband rejection. International Journal of RF and Microwave Computer-Aided Engineering, 25(6), 490–494.CrossRefGoogle Scholar
  9. 9.
    Li, L., Bao, J., Du, J. J., & Wang, Y. (2014). Stopband-extended and size-miniaturized low-pass filter with three transmission zeros. ETRI Journal, 36(2), 286–292.CrossRefGoogle Scholar
  10. 10.
    Suhas, D., Lakshmi, C. R., Srinivasa Rao, Z., & Kannadassan, D. (2015). A systematic implementation of elliptic low-pass filters using defected ground structures. Journal of Electromagnetic Waves and Applications, 29(15), 2014–2026.CrossRefGoogle Scholar
  11. 11.
    Khakzad, H. R., Sedighy, S. H., & Amirhosseini, M. K. (2013). Design of compact SITLs low pass filter by using invasive weed optimization (IWO) technique. ACES Journal, 28(3), 228–233.Google Scholar
  12. 12.
    Hayati, M., Shama, F., & Ekhteraei, M. (2016). Miniaturized microstrip suppressing cell with wide stopband. Applied Computational Electromagnetics Society Journal, 31(10), 1244–1249.Google Scholar
  13. 13.
    Zhang, P., & Li, M. (2016). A novel sharp roll-off microstrip lowpass filter with improved stopband and compact size using dual-plane structure. Microwave and Optical Technology Letters, 58(5), 1085–1088.CrossRefGoogle Scholar
  14. 14.
    Kufa, M., & Raida, Z. (2013). Lowpass filter with reduced fractal defected ground structure. Electronics Letters, 49(3), 199–201.CrossRefGoogle Scholar
  15. 15.
    Verma, A. K., Chaudhari, N. P., & Kumar, A. (2013). High performance microstrip transverse resonance lowpass filter. Microwave and Optical Technology Letters, 55(5), 1149–1152.CrossRefGoogle Scholar
  16. 16.
    Boutejdar, A., Omar, A., & Burte, E. (2014). High-performance wide stop band low-pass filter using a vertically coupled DGS-DMS-resonators and interdigital capacitor. Microwave and Optical Technology Letters, 56(1), 87–91.CrossRefGoogle Scholar
  17. 17.
    Majidifar, S. (2016). Design of high performance miniaturized lowpass filter using new approach of modeling. Applied Computational Electromagnetics Society Journal, 31(1), 52–57.Google Scholar
  18. 18.
    Hayati, M., Ekhteraei, M., & Shama, F. (2017). Compact lowpass filter with flat group delay using lattice-shaped resonator. Electronics Letters, 53(7), 475–476.CrossRefGoogle Scholar
  19. 19.
    Kumar Singh, P., Kumar Tiwary, A., & Gupta, N. (2017). Ultra-compact switchable microstrip band-pass filter–low-pass filter with improved characteristics. Microwave and Optical Technology Letters, 59(1), 197–201.CrossRefGoogle Scholar
  20. 20.
    Chen, X., Zhang, L., Peng, Y., Leng, Y., Lu, H., & Zheng, Z. (2015). Compact lowpass filter with wide stopband bandwidth. Microwave and Optical Technology Letters, 57(2), 367–371.CrossRefGoogle Scholar
  21. 21.
    Raphika, P. M., Abdulla, P., & Jasmine, P. M. (2016). Planar elliptic function lowpass filter with sharp roll-off and wide stopband. Microwave and Optical Technology Letters, 58(1), 133–136.CrossRefGoogle Scholar
  22. 22.
    Boutejdar, A. (2016). Design of a very compact U-HI-LO low-pass filter using meander technique and quasi horn inductors for L-band and C-band applications. Microwave and Optical Technology Letters, 58(12), 2897–2901.CrossRefGoogle Scholar
  23. 23.
    Roshani, S. (2017). A compact microstrip low-pass filter with ultra wide stopband using compact microstrip resonant cells. International Journal of Microwave and Wireless Technologies, 9(5), 1023–1027.CrossRefGoogle Scholar
  24. 24.
    Roshani, S., Golestanifar, A. R., Ghaderi, A. H., & Roshani, S. (2017). Miniaturized LPF with sharp transition-band using semi-circle resonators. Applied Computational Electromagnetics Society Journal, 32(4), 344–351.Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  • Saeed Roshani
    • 1
    Email author
  • Alireza Golestanifar
    • 2
  • Amirhossein Ghaderi
    • 2
  • Hesam Siahkamari
    • 2
  • Derek Abbott
    • 3
  1. 1.Department of Electrical Engineering, Kermanshah BranchIslamic Azad UniversityKermanshahIran
  2. 2.Young Researchers and Elite Club, Kermanshah BranchIslamic Azad UniversityKermanshahIran
  3. 3.School of Electrical and Electronic EngineeringUniversity of AdelaideAdelaideAustralia

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