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Design of Compact Bandpass Filter with Controllable Multiple Transmission Zeros using The Second‐Order Inductive‐Coupled Resonator
Author(s) -
Huang HuiHsiang,
Horng TzyySheng
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27807
Subject(s) - stopband , band pass filter , resonator , electronic engineering , inductor , microwave , harmonic , engineering , capacitor , distributed element filter , filter (signal processing) , topology (electrical circuits) , electrical engineering , physics , prototype filter , filter design , acoustics , telecommunications , voltage
This article proposes new synthetic design approach for a compact LTCC bandpass filter (BPF) with three transmission zeros over a wide stopband operating in the 2.4–2.5 GHz WLAN band. The BPFs have two feedback paths, one for a grounding inductor and one for a coupling capacitor, to provide controllable multiple transmission zeros at 1.07 and 5.05 GHz stopband, which suppresses the 0.82–0.96 GHz GSM850/GSM900 band and 4.8–5.0 GHz second harmonic band of the operating frequency. The presented design derives compact formulas for synthesizing a filter to meet the specification requirement. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2155–2157, 2013