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High-selectivity dual-band bandpass filter using asymmetric stepped-impedance resonators

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4 Author(s)
Zhang, X.Y. ; Wireless Commun. Res. Center, Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong ; Chen, J.-X. ; Shi, J. ; Xue, Q.

A dual-band bandpass filter with high selectivity is presented. Using only a single set of asymmetric stepped-impedance resonators, this filter can create five transmission zeros near the passband edges and between the two passbands to improve the selectivity. Based on the proposed idea, a microstrip dual-band bandpass filter is implemented.

Published in:

Electronics Letters  (Volume:45 ,  Issue: 1 )