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A tri-section stepped-impedance resonator for cross-coupled bandpass filters

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2 Author(s)
Hualiang Zhang ; Electr. & Electron. Eng. Dept., Hong Kong Univ. of Sci. & Technol., Kowloon, China ; K. J. Chen

We report a new tri-section stepped-impedance resonator (SIR) that features a short and low-impedance section inserted in a two-section SIR. The inserted section not only makes the resonator more compact, but also enables the flexibility of introducing cross coupling in a filter configuration. Using the tri-section SIR, a cascaded triplet bandpass filter is demonstrated, featuring sharp roll-off at the high edge of the passband.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:15 ,  Issue: 6 )