Skip to main content

A Highly Selective Stripline Lowpass Filter with More Than 100-dB Wide Stopband Attenuation

Abstract

A new miniature design of a highly selective lowpass filter based on a suspended substrate with a two-sided stripline pattern has been developed. The filter frequency response slope (cutoff attenuation rate) and stopband attenuation depth are determined by transmission zeros, the number of which is equal to the filter order. An experimental prototype of a fifth-order lowpass filter on 0.5-mm-thick alumina substrate with dielectric permittivity ε = 9.8 has been synthesized with the aid of numerical electrodynamic analysis of a three-dimensional model. The cutoff frequency of the filter passband at a –1-dB level is   fc = 1.75 GHz. The stopband width at a –100-dB attenuation level reaches 4.4fc.

This is a preview of subscription content, access via your institution.

Fig. 1.
Fig. 2.
Fig. 3.

REFERENCES

  1. 1

    I. C. Hunter, Theory and Design of Microwave Filters, Vol. 48 of IET Electromagnetic Waves Ser. (Cambridge Univ. Press, Cambridge, 2006).

  2. 2

    M. A. Morgan, Reflectionless Filters, Artech House Microwave Library (Artech House, Boston, London, 2017).

  3. 3

    Ya. A. Kolmakov and I. B. Vendik, in Proceedings of the 35th European Microwave Conference (France, Paris, 2005), Vol. 1, Paper No. 1608783, p. 21.

  4. 4

    B. A. Belyaev, S. A. Khodenkov, An. A. Leksikov, and V. F. Shabanov, Dokl. Phys. 62, 289 (2017).

    ADS  Article  Google Scholar 

  5. 5

    C.-L. Hsu, F.-C. Hsu, and J.-T. Kuo, in Proceedings of the IEEE MTT-S International Microwave Symposium (2005), Paper No. 1516698, p. 679.

  6. 6

    V. Piatnitsa, D. Kholodnyak, T. Tick, A. Simin, P. Turalchuk, E. Zameshaeva, J. Jantti, H. Jantunen, and I. Vendik, in Proceedings of the 37th European Microwave Conference Munich, Germany,2007, Paper No. 4405248, p. 544.

  7. 7

    J.-S. Hong, Microstrip Filters for RF/Microwave Applications (Hoboken, Wiley, 2011).

    Book  Google Scholar 

  8. 8

    B. A. Belyaev, S. A. Khodenkov, R. G. Galeev, and V. F. Shabanov, Dokl. Phys. 64, 85 (2019).

    ADS  Article  Google Scholar 

Download references

Funding

This study was supported in part by the Ministry of Education and Science of the Russian Federation in the framework of agreement no. 02G25.31.0330.

Author information

Affiliations

Authors

Corresponding author

Correspondence to B. A. Belyaev.

Ethics declarations

The authors declare that they have no conflict of interest.

Additional information

Translated by P. Pozdeev

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Belyaev, B.A., Serzhantov, A.M., Leksikov, A.A. et al. A Highly Selective Stripline Lowpass Filter with More Than 100-dB Wide Stopband Attenuation. Tech. Phys. Lett. 46, 364–367 (2020). https://doi.org/10.1134/S1063785020040173

Download citation

Keywords:

  • lowpass filter
  • substrate
  • stripline resonator
  • stopband.