Vol. 9

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2009-08-01

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

By Nima Molaei Garmjani and Nader Komjani
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.

Citation


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
http://jpier.org/PIERC/pier.php?paper=09062207

References


    1. Hong, J. S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, 2001.
    doi:10.1002/0471221619

    2. Hong, J. S. and M. J. Lancaster, "Theory and experiment of novel microstrip slow-wave open-loop resonator filters," IEEE Transactions on Microwave Theory and Techniques, Vol. 45, No. 12, December 1997.

    3. Makimoto, M., S. Yamashita, and M. Sagawa, "Geometrical structures and fundamental characteristics of microwave stepped-impedance resonators," IEEE Transactions on Microwave Theory and Techniques, Vol. 45, No. 7, July 1997.

    4. Hong, J. S. and M. J. Lancaster, "End-coupled microstrip slow-wave resonator filter," Electron. Letters, Vol. 32, 1494-1496, 1996.
    doi:10.1049/el:19960959

    5. Abdel-Rahman, A., A. K. Verma, A. Boutejdar, and A. S. Omar, "Compact stub type microstrip band pass filter using defected ground plane," IEEE Microwave and Wireless Components Letters, Vol. 14, No. 4, April 2004.

    6. Ahn, D., et al., "A design of the low-pass filter using the novel microstrip defected ground structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 49, No. 1, January 2001.
    doi:10.1109/22.899965