Advertisement

Quad-band bandstop filter modeled by comprising quad-section stepped-impedance resonator

Article
  • 11 Downloads

Abstract

This paper presents the implementation of symmetric folded meandered-line structure that includes a quad-section stepped impedance resonator (QSIR). The existence of four stop bands at 1.81/5.16/8.08/10.90 GHz was successfully synthesized by the incorporation of QSIR comprising an electrical length of 0.84λg–0.19λg–0.15λg–0.22λg. The throughput of the filter was further improved by the inclusion of five attenuation poles at 340 MHz, 3.24, 6.38, 9.45, and 11.92 GHz with the rejection levels of − 32.19, − 25.19, − 28.68, − 21.57, − 32.63 dB, respectively. The concept achieves a wide fractional bandwidth of 59/18.23/13.86/10.46% at 1.81/5.16/8.08/10.90 GHz, respectively. Noticeable attenuation of − 25 dB at the respective stop bands in the frequency range of 2.34–1.28, 5.60–4.66, 8.56–7.44, and 11.35–10.21 GHz, with a spurious-free response up to 13 GHz was confirmed. Furthermore, a sharp response is demonstrated by a simulation and shows strong agreement with the measurement results.

Keywords

Bandstop filter (BSF) Symmetric meandered-line Quad-band Quad-section Stepped-impedance resonator (SIR) 

Notes

Acknowledgements

This research was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (MISP) (2016R1A4A1011761). The part of this research was also supported by the research Grant of Sejong University in 2018.

References

  1. 1.
    Hong, J., & Lancaster, M. J. (2001). Microstrip filters for RF/microwave applications. New york: Wiley.CrossRefGoogle Scholar
  2. 2.
    Psychogiou, D., Gomez-Garcia, R., & Peroulis, D. (2016). Fully adaptive multiband bandstop filtering sections and their application to multifunctional components. IEEE Transactions on Microwave Theory and Techniques, 64, 4405–4418.  https://doi.org/10.1109/TMTT.2016.2618396.CrossRefGoogle Scholar
  3. 3.
    Koirala, G. R., Shrestha, B., & Kim, N. Y. (2016). Compact dual-wideband bandstop filter using a stub-enclosed stepped-impedance resonator. AEU International Journal of Electronics and Communications, 70, 198–203.  https://doi.org/10.1016/j.aeue.2015.11.011.CrossRefGoogle Scholar
  4. 4.
    Chiou, H.-K., & Tai, C.-F. (2009). Dual-band microstrip bandstop filter using dual-mode loop resonator. Electronics Letters, 45, 507.  https://doi.org/10.1049/el.2009.0235.CrossRefGoogle Scholar
  5. 5.
    Dhakal, R., & Kim, N.-Y. (2013). A compact microstrip triple-band bandstop filter with rectangular meandered SIR for WiMAX applications. In Asia-Pacific microwave conference proceedings, APMC.Google Scholar
  6. 6.
    Xu, J., Wu, W., & Miao, C. (2013). Compact microstrip dual-/tri-/quad-band bandpass filter using open stubs loaded shorted stepped-impedance resonator. IEEE Transactions on Microwave Theory and Techniques, 61, 3187–3199.  https://doi.org/10.1109/TMTT.2013.2273759.CrossRefGoogle Scholar
  7. 7.
    Janković, N., Geschke, R., & Crnojević-Bengin, V. (2013). Compact tri-band bandpass and bandstop filters based on Hilbert-fork resonators. IEEE Microwave and Wireless Components Letters, 23, 282–284.  https://doi.org/10.1109/LMWC.2013.2258005.CrossRefGoogle Scholar
  8. 8.
    Sassi, I., Talbi, L., & Hettak, K. (2015). Compact multi-band filter based on multi-ring complementary split ring resonators. Progress in Electromagnetics Research, 57, 127–135.CrossRefGoogle Scholar
  9. 9.
    Tirado-Mendez, J. A., Jardon-Aguilar, H., Flores-Leal, R., Andrade-Gonzalez, E. A., & Iturbide-Sanchez, F. (2010). Improving frequency response of microstrip filters using defected ground and defected microstrip structures. Progress in Electromagnetics Research C, 13, 77–90.  https://doi.org/10.2528/PIERC10011505.CrossRefGoogle Scholar
  10. 10.
    Ning, H., Wang, J., Xiong, Q., Liu, H., & Mao, L. (2012). A compact quad-band bandstop filter using dual-plane defected structures and open-loop resonators. IEICE Electronics Express, 9, 1630–1636.  https://doi.org/10.1587/elex.9.1630.CrossRefGoogle Scholar
  11. 11.
    Xiao, J. K., & Zhu, Y. F. (2014). Multi-band bandstop filter using inner T-shaped defected microstrip structure (DMS). AEU International Journal of Electronics and Communications, 68, 90–96.  https://doi.org/10.1016/j.aeue.2013.07.002.CrossRefGoogle Scholar
  12. 12.
    Moyra, T. (2013). Modeling of bandpass filter using defected ground structure and defected microstrip structure. Journal of Computational Electronics, 12, 287–296.  https://doi.org/10.1007/s10825-013-0445-z.CrossRefGoogle Scholar
  13. 13.
    Karpuz, C., Gorur, A. K., & Emur, M. (2016). Quad-band microstrip bandstop filter design using dual-mode open loop resonators having thin film capacitors. IEEE Microwave and Wireless Components Letters, 26, 873–875.  https://doi.org/10.1109/LMWC.2016.2615092.CrossRefGoogle Scholar
  14. 14.
    Dhakal, R., & Kim, N. (2014). A compact dual band bandstop filter using circular folded type symmetric meandered line stepped—Impedance resonator. Microwave and Optical Technology Letters, 56, 2298–2301.CrossRefGoogle Scholar
  15. 15.
    Mishra, G. K., & Kumar, S. (2015). Reconfigurable band stop filter for bandwidth control in IMT-advanced. Microwave Review, 8, 160–174.Google Scholar
  16. 16.
    Kumar, A., Verma, A. K., Zhang, Q., Kumar, P., Singh, P. P., Rishishwar, R. P., et al. (2016). Design of single-band to hexa-band bandstop filters. Progress in Electromagnetics Research C, 68, 31–44.CrossRefGoogle Scholar
  17. 17.
    Dhakal, R., & Kim, N. Y. (2013). A compact symmetric microstrip filter based on a rectangular meandered-line stepped impedance Resonator with a triple-band bandstop response. Scientific World Journal.  https://doi.org/10.1155/2013/457693.Google Scholar

Copyright information

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

Authors and Affiliations

  1. 1.Department of Computer Science and EngineeringSejong UniversitySeoulRepublic of Korea
  2. 2.Department of Culture Contents and Convergence ICTSongho UniversityHoengseonRepublic of Korea
  3. 3.Department of Electronic EngineeringKwangwoon UniversitySeoulRepublic of Korea
  4. 4.Department of Applied MathematicsKongju National UniversityKongjuRepublic of Korea

Personalised recommendations