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2012-10-16
A Novel Triple Passband Filter Design Method Based on Stepped Impedance Resonators
By
Progress In Electromagnetics Research C, Vol. 33, 199-211, 2012
Abstract
In this letter, a novel compact tri-band bandpass filter (BPF) with high selectivity is presented. The proposed tri-band performance measure is realized by using eight sets of resonators, i.e., two- and three-section stepped impedance resonators (SIRs). The three-section SIR is designed for determining the three passbands and providing the electric coupling, while the two-section SIR is used for determining each passband respectively and providing the magnetic coupling. Then, coupling structures with two transmission zeros near each passband edge are presented, therefore, the band selectivity of the filter is much improved. The three passband frequencies could be independently designed and tuned. This novel tri-band BPF is fabricated and the measured results are in good agreement with the full-wave simulation results.
Citation
Zhi-Peng Li Sheng-Jie Wang Tao Su Chang-Hong Liang , "A Novel Triple Passband Filter Design Method Based on Stepped Impedance Resonators," Progress In Electromagnetics Research C, Vol. 33, 199-211, 2012.
doi:10.2528/PIERC12090506
http://www.jpier.org/PIERC/pier.php?paper=12090506
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