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Progress In Electromagnetics Research
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DESIGN AND FABRICATION OF A QUAD-BAND BANDPASS FILTER USING MULTI-LAYERED SIR STRUCTURE

By R.-Y. Yang, C.-Y. Hung, and J.-S. Lin

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Abstract:
In this paper, design and fabrication of a quad-band microstrip bandpass filter (BPF) using multi-layered stepped impedance resonators (SIRs) structure is proposed. One pair of SIR on the top layer is designed to operate at the 1st and 3rd passbands (1.56/3.57 GHz), and the other pair is at 2nd and 4th passbands (2.42/5.23 GHz) by tuning the impedance and length ratios of the SIRs. In order to find the desired coupling location between the SIRs located on different layers and the input/output (I/O) lines, the voltage, current and power wave on the I/O lines are analyzed. It is verified that the proposed quad-band filter has good passband performances with an excellent isolation between adjacent bands for GPS, WLAN, and WiMAX applications.

Citation:
R.-Y. Yang, C.-Y. Hung, and J.-S. Lin, "Design and Fabrication of a Quad-Band Bandpass Filter Using Multi-Layered Sir Structure," Progress In Electromagnetics Research, Vol. 114, 457-468, 2011.
doi:10.2528/PIER11010606
http://www.jpier.org/PIER/pier.php?paper=11010606

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