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Compact quint‐band Bandpass Filter design in a rigorous manner utilizing multimode stub‐loaded taper
Author(s) -
Li Xiaokun,
Zhang Yonghong,
Zhang Xingyu,
Qu Lili,
Yong Fan
Publication year - 2018
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.31142
Subject(s) - stub (electronics) , band pass filter , multi mode optical fiber , resonator , electronic engineering , insertion loss , topology (electrical circuits) , physics , computer science , engineering , optoelectronics , optics , electrical engineering , optical fiber
Abstract On a basis of 2 multimode resonators (MMRs) using stub‐loaded taper, a compact quint‐band BPF is proposed. Progressively, triple open‐circuited stubs and notch are loaded to taper without introducing extra coupling paths, and both tri‐, quad‐ and quint‐band BPF responses are available. In this way, design procedure is rigorous and reduction of coupling paths minimizes the quint‐band BPF design complexity, simultaneously. Meanwhile, owing to the cancelling effect of notch, independent control on central frequencies of 2 passbands can be achieved. The insertion loss is lower since taper is adopted to the building of MMR. Good agreement between simulated and measured results validates the design method.