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Compact tri‐band bandpass filter with controllable frequencies
Author(s) -
Xu JinXu,
Gao Li,
Xiang Jun,
Xue Quan
Publication year - 2016
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.29614
Subject(s) - stub (electronics) , band pass filter , passband , resonator , microwave , electrical impedance , center frequency , electronic engineering , transmission line , acoustics , frequency selectivity , physics , electrical engineering , engineering , telecommunications
In this paper, we present a compact tri‐band bandpass filter (BPF). The resonator, which consists of a main transmission line, a center‐loaded open stub and a side‐loaded open stub, is utilized to obtain the three resonance frequencies. After selecting the impedance of each stub at this resonator, the passband frequencies can be controlled individually. Four transmission zeros are generated to enhance the selectivity. For demonstration, a compact tri‐band BPF is implemented. Good agreement between the measured and simulated results is presented to verify the theoretical predication. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:573–577, 2016