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Faculty of Science, University of Brunei Darussalam, Brunei Darussalam   
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IJIEE 2015 Vol.5(2): 79-83 ISSN: 2010-3719
DOI: 10.7763/IJIEE.2015.V5.506

Switchable Dual-Band Filter with Hybrid Feeding Structure

Ming-Lin Chuang, Ming-Tien Wu, and Pei-Ru Wu
Abstract— This study presents a novel switchable dual-band filter. An original concurrent dual-band filter uses a hybrid feeding structure such that the external quality factors of the two designated bands can be obtained individually. Therefore, there is no need for a dual-band impedance transformer and time-consuming parameter tuning is avoided. Stepped-impedance quarter-wavelength resonators are used to reduce the circuit size. Two types of switching circuit are added to the original concurrent dual-band filter to obtain a switchable dual-band filter. The proposed switchable dual-band filter has four possible operating states and thus the two passbands can be enabled or disabled independently.

Index Terms— Switchable dual-band filter, stepped-impedance resonator, quarter-wavelength resonator.

Ming-Lin Chuang, Ming-Tien Wu, and Pei-Ru Wu are with the Communication Engineering Department, National Penghu University of Science and Technology, Taiwan (e-mail: morris@npu.edu.tw).

[PDF]

Cite: Ming-Lin Chuang, Ming-Tien Wu, and Pei-Ru Wu, " Switchable Dual-Band Filter with Hybrid Feeding Structure," International Journal of Information and Electronics Engineering vol. 5, no. 2, pp. 79-83, 2015.

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