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A compact dual-band bandpass filter with adjustable second passband using S-shaped stepped impedance resonator embedded by open stubs

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2 Author(s)
Xing-Bing Ma ; Inst. of Antenna & Microwave Tech., Tianjin Univ. of Technol. & Educ., Tianjin, China ; Hong-Xing Zheng

A dual-band bandpass filter (BPF) is discussed in this paper. To obtain adjustable second passband, two same open stubs are embedded on S-Shaped stepped impedance resonator. By changing the length of two same stubs, the second resonant frequency can be adjusted significantly, In addition, filter with only one stub embedded has also been discussed, the differences between them has been analysed. Based on the proposed topology, a prototype was fabricated to achieve dual-band applications around 2.4 and 3.5 GHz. Experiment results demonstrate the newly designed filter available.

Published in:

Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 2011  (Volume:1 )

Date of Conference:

26-30 July 2011