A NOVEL TRIPLE PASSBAND FILTER DESIGN METHOD BASED ON STEPPED IMPEDANCE RESONATORS | Zendy

Zhipeng Li | Zendy; Shengjie Wang | Zendy; Tao Su | Zendy; Changhong Liang | Zendy

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A NOVEL TRIPLE PASSBAND FILTER DESIGN METHOD BASED ON STEPPED IMPEDANCE RESONATORS

Author(s) -

Zhipeng Li,

Shengjie Wang,

Tao Su,

Changhong Liang

Publication year - 2012

Publication title -

progress in electromagnetics research c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 34

ISSN - 1937-8718

DOI - 10.2528/pierc12090506

Subject(s) - passband , resonator , electrical impedance , filter (signal processing) , acoustics , materials science , electronic engineering , band pass filter , engineering , optoelectronics , physics , electrical engineering

In this letter, a novel compact tri-band bandpass fllter (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 fllter 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.

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