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Design of compact ultra-wideband filter using stepped impedance dual-mode resonator

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5 Author(s)
Z. -Y Xiao ; School of Communication and Information Engineering and the Key Laboratory of Specialty Fiber, Optics and Optical Access Networks, Shanghai University, Shanghai 200072, P.R. China ; D. -C Ma ; L. -L Xiang ; H. -H Hu
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A compact ultra-wideband (UWB) filter is designed by a proposed stepped impedance dual-mode resonator. The dual-mode resonator is formed by adjusting the impedance ratio. There are four resonant modes inside pass-band of the novel filter, two of which are generated by dual-mode resonator and the other two modes are produced by parallel-coupled feed lines. This results in the formulation of the novel UWB filter with wide bandwidth and compact size. The measured results show that the 10 dB pass-band of the novel filter is from 5.2 GHz to 10.9 GHz and fractional bandwidth of up to 70%. The Simulated results are agreement well with the measured results.

Published in:

2010 International Symposium on Signals, Systems and Electronics  (Volume:2 )

Date of Conference:

17-20 Sept. 2010