volume | PIER Journals

2009-08-01

Quasi-Elliptic Bandpass Filter Based on SIR with Elimination of First Spurious Response

Nima Molaei Garmjani,

Mr. Nima Molaei Garmjani

Electrical Engineering Department

Iran University of Science & Technology (IUST)

Iran

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Nader Komjani

Professor Nader Komjani

Department of Electrical Engineering

Iran University of Science and Technology

Iran

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Progress In Electromagnetics Research C, Vol. 9, 89-100, 2009

doi:10.2528/PIERC09062207

Abstract

In this paper, a quasi-elliptic bandpass filter was designed, simulated, and fabricated using four-pole cross-coupled stepped impedance resonators (SIR). Using a special type of stepped impedance resonators, a great increase in rejection band width of the filter was obtained. In order to perform the mentioned design practically, we utilized a compound sandwich model of two substrates (in strip line form). Furthermore, we used Defected Ground Structure (DGS) in order to omit the first spurious resonant frequency and increase bandwidth of the filter. The fabricated sample was measured, and the results showed a good agreement with simulated results.

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Nima Molaei Garmjani, and Nader Komjani, "Quasi-Elliptic Bandpass Filter Based on SIR with Elimination of First Spurious Response," Progress In Electromagnetics Research C, Vol. 9, 89-100, 2009.
doi:10.2528/PIERC09062207

References

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