Title :
A tri-section stepped-impedance resonator for cross-coupled bandpass filters
Author :
Zhang, Hualiang ; Chen, Kevin J.
Author_Institution :
Electr. & Electron. Eng. Dept., Hong Kong Univ. of Sci. & Technol., Kowloon, China
fDate :
6/1/2005 12:00:00 AM
Abstract :
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.
Keywords :
band-pass filters; coupled circuits; microstrip filters; resonator filters; SIR short low-impedance section; cascaded triplet bandpass filter; cross coupling; cross-coupled bandpass filters; fractional bandwidth; microstrip bandpass filters; passband high edge sharp roll-off; tri-section stepped-impedance resonator; Band pass filters; Bandwidth; Impedance; Microstrip filters; Microstrip resonators; Microwave filters; Passband; Radio frequency; Resonance; Resonator filters; Cascaded-triplet (CT) filter; fractional bandwidth (FBW); microstrip bandpass filters; stepped-impedance resonator(SIR);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.850475
