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Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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NOVEL DESIGN OF A COMPACT TRIPLE-BAND BANDPASS FILTER USING SHORT STUB-LOADED SIRS AND EMBEDDED SIRS STRUCTURE

By K. Xu, Y.-H. Zhang, D. Li, Y. Fan, J. L.-W. Li, W. T. Joines, and Q. H. Liu

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Abstract:
A novel compact planar triple-band bandpass filter using two sets of short stub-loaded stepped impedance resonators (SSLSIRs) and a pair of embedded stepped impedance resonators (ESIRs) has been proposed. The SSLSIRs can adjust the bandwidths of the corresponding passbands over a wide range, and the ESIRs employing non 0° -feed coupled structure with mixed electric and magnetic coupling can obtain an extra transmission zero. The embedded resonators structure can further miniaturize the dimensions of the whole triple-band filter. The operating frequencies of the SSLSIRs and ESIRs are designed for the applications of the WLAN (2.45/5.2 GHz) and WiMAX (3.5 GHz) systems, respectively. The simulated and measured results are both presented and show good agreement.

Citation:
K. Xu, Y.-H. Zhang, D. Li, Y. Fan, J. L.-W. Li, W. T. Joines, and Q. H. Liu, "Novel Design of a Compact Triple-Band Bandpass Filter Using Short Stub-Loaded Sirs and Embedded Sirs Structure," Progress In Electromagnetics Research, Vol. 142, 309-320, 2013.
doi:10.2528/PIER13080507
http://www.jpier.org/PIER/pier.php?paper=13080507

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