Vol. 13

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2009-03-11

Synthesis of Triple-Band and Quad-Band Bandpass Filters Using Lumped-Element Coplanar Waveguide Resonators

By Min-Sou Wu, Yu-Zhi Chueh, Jen-Chun Yeh, and Shau-Gang Mao
Progress In Electromagnetics Research B, Vol. 13, 433-451, 2009
doi:10.2528/PIERB09021302

Abstract

This paper develops a novel design method for synthesizing the multi-passband filter with high flexibility in various passband location and fractional bandwidth. Using the proposed compensation technology in the equivalent circuit of multi-passband resonator, the cutoff frequencies and matching property in passband regions can be improved. Triple- and quad-band bandpass filters operating in both wireless local area network (WLAN) 802.11 a/b/g and worldwide interoperability for microwave access (WiMAX) systems are presented to verify the design method. The lumped-element coplanar waveguide stub fabricated by the split-ring resonator is established to realize filter with compact size. All the measured, full-wave simulated and equivalent-circuit modeled results illustrate a good agreement among them, which validates the multi-passband design methodology and shows the advantages of DC elimination and deep rejection between each passband.

Citation


Min-Sou Wu, Yu-Zhi Chueh, Jen-Chun Yeh, and Shau-Gang Mao, "Synthesis of Triple-Band and Quad-Band Bandpass Filters Using Lumped-Element Coplanar Waveguide Resonators," Progress In Electromagnetics Research B, Vol. 13, 433-451, 2009.
doi:10.2528/PIERB09021302
http://www.jpier.org/PIERB/pier.php?paper=09021302

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