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Microstrip Lowpass Filter with Ultrawide Stopband and Sharp Roll-off

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Abstract

In this paper, a novel microstrip lowpass filter using curved T-shaped and stepped-impedance resonator with the folded lines is presented. The cutoff frequency of the proposed filter is adjusted to 1.5 GHz. The transition band is 0.21 GHz from 1.5 to 1.71 GHz with corresponding attenuation levels of −3 and −20 dB, respectively. The stopband with minimum attenuation level of 20 dB is obtained from 1.71 to 20 GHz, and the insertion loss is <0.1 dB. The return loss is more than 20 dB, and the overall size of the filter is \({0.017\lambda_{g}^{2}(28 \times13\,{\rm mm}^{2})}\). The proposed filter is fabricated and measured. The simulation and measurement results are in good agreement.

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References

  1. Hong J.S., Lancaster M.J.: Microstrip Filters for RF/Microwave Applications. Wiley, New York (2001)

    Book  Google Scholar 

  2. Li J.L., Qu S.W., Xue Q.: Compact microstrip lowpass filter with sharp roll-off and wide stop-band. Electron. Lett. 452, 110–111 (2009)

    Article  Google Scholar 

  3. Hayati M., Lotfi A.: Compact lowpass filter with high and wide rejection in stopband using front coupled tapered CMRC. Electron. Lett. 4512, 846–848 (2010)

    Article  Google Scholar 

  4. Wei F., Chen L., Shi X.-W., Huang Q.-L., Wang X.-H.: Compact lowpass filter with wide stopband using coupled line hairpin units. Electron. Lett. 461, 88–90 (2010)

    Article  Google Scholar 

  5. Velidi V.K., Sanyal S.: sharp roll-off lowpass filter with wide stopband using stub-loaded coupled-line hairpin unit. IEEE Microw. Wirel. compon. Lett. 216, 301–303 (2011)

    Article  Google Scholar 

  6. Ma K., Yeo K.S.: New ultra wide stopband lowpass filter using transformed radial stubs. IEEE Trans. Microw. Theory Tech. 593, 604–611 (2011)

    Article  Google Scholar 

  7. Wang J.P., Xu L.J., Zhao S., Guo Y.X., Wu. W.: Compact quasi-elliptic microstrip lowpass filter with wide stopband. Electron. Lett. 4620, 1384–1385 (2010)

    Article  Google Scholar 

  8. Wang J.P., Ge L., Guo Y.X., Wu W.: Miniaturised microstrip low pass filter with broad stopband and sharp roll-off. Electron. Lett. 468, 573–575 (2010)

    Article  Google Scholar 

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Authors and Affiliations

  1. Electrical Engineering Department, Faculty of Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

    Mohsen Hayati, Hamed Abbasi & Farzin Shama

Authors
  1. Mohsen Hayati
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  2. Hamed Abbasi
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  3. Farzin Shama
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Corresponding author

Correspondence to Mohsen Hayati.

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Hayati, M., Abbasi, H. & Shama, F. Microstrip Lowpass Filter with Ultrawide Stopband and Sharp Roll-off. Arab J Sci Eng 39, 6249–6253 (2014). https://doi.org/10.1007/s13369-014-1237-x

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  • DOI: https://doi.org/10.1007/s13369-014-1237-x

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