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Compact quad-band bandpass filter based on uniform impedance stub-loaded resonators

  • Siang-Wen Lan (a1), Min-Hang Weng (a2), Chang-Sin Ye (a1) and Cheng-Yuan Hung (a2)

Abstract

A new quad-band bandpass filter for Global System for Mobile Communications, Wireless Local Area Network, and Worldwide Interoperability for Microwave Access is designed and fabricated using the stub-loaded resonator (SLR) technology without complex fabrication process, such as via-hole or multi-layer substrate. Owing to the embedded SLR, the proposed quad-mode resonator is compact. Equivalent circuits of the proposed quad-mode resonator are analyzed in detail, and high design freedom is shown because of shifting the passband frequencies individually. Good passband selectivity and isolation of the each passband at 1.8, 2.4, 3.5, and 5.2 GHz can be well achieved due to the transmission zeros appeared near the each passband edges. Experimental results show good agreement with the simulated results.

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Corresponding author

Corresponding author: C.-Y. Hung Email: goliro.goliro@gmail.com

References

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[2]Liu, J.C.; Wang, J.W.; Zeng, B.H.; Chang, D.C.: CPW-fed dualmode double-square-ring resonators for quad-band filters. IEEE Microw. Wireless Compon. Lett., 20 (2010), 142144.
[3]Cheng, C.C.; Yang, C.F.: Develop quad-band (1.57/2.45/3.5/5.2 GHz) bandpass filters on the ceramic substrate. IEEE Microw. Wireless Compon. Lett., 20 (2010), 594596.
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Compact quad-band bandpass filter based on uniform impedance stub-loaded resonators

  • Siang-Wen Lan (a1), Min-Hang Weng (a2), Chang-Sin Ye (a1) and Cheng-Yuan Hung (a2)

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