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Compact and narrowband LTCC filter using vertically stacked end‐coupled resonators
Author(s) -
Li Yufu
Publication year - 2017
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.30234
Subject(s) - narrowband , resonator , materials science , band pass filter , filter (signal processing) , electronic engineering , acoustics , optoelectronics , electrical engineering , engineering , physics
A compact and narrowband low temperature co‐fired ceramic (LTCC) bandpass filter (BPF) is proposed using vertically stacked half‐wavelength end‐coupled resonators. The multilayered end‐coupled stripline resonators are stacked and buried into LTCC substrate for vertical end‐coupling and size reduction. The coupling strength between adjacent resonators is adjustable by offsetting the intermediate ground layer. A narrowband fractional bandwidth (FBW) of 1.9% and a significant size reduction of 80% are achieved. Measurements agree with the simulation results well. Performance and size reduction comparisons and discussions are also implemented. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:86–89, 2017