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Compact microstrip dual-band bandpass filter using short-stub loaded half-wavelength resonator

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2 Author(s)
MinhTan Doan ; Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China ; Wenquan Che

A compact microstrip dual-band bandpass filter (BPF) using short-stub loaded half-wavelength resonator is proposed in this paper. By tuning the length and width of short-stub and half-wavelength line, two center frequencies can be easily adjusted to the desired value. Furthermore, new structure of couple-line is introduced to satisfy desired external coupling degree for each band. In this way, the bandwidths of this filter are controllable, while taking good selectivity and improved upper-stopband performance. Two passbands are designed to operate at 2.4 GHz and 3.5 GHz, respectively. A prototype of dual-band bandpass filter is designed and fabricated for demonstration, good agreement is observed between the measured and the theoretical expectation.

Published in:

Advanced Technologies for Communications (ATC), 2011 International Conference on

Date of Conference:

2-4 Aug. 2011

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