Open AccessHigh selective microstrip bandpass filter and diplexer with common magnetic coupling
Author(s) -
Xiao JianKang,
Zhang Min,
Ma JianGuo
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.6903
Subject(s) - diplexer , band pass filter , microstrip , inductive coupling , coupling (piping) , filter (signal processing) , insertion loss , materials science , transmission (telecommunications) , electronic engineering , acoustics , optoelectronics , physics , electrical engineering , engineering , metallurgy
A new common magnetic coupling structure has been proposed. A high selective microstrip bandpass filter and a diplexer with the common magnetic coupling and 0° feeding have been developed. A pair of transmission zeros can be generated by 0° feeding, while an additional transmission zero can be produced by the common magnetic coupling structure and can be controlled/adjusted by the electric/magnetic couplings. The proposed diplexer has been fabricated and measured, and the measurement shows a channel insertion loss of <1.3 dB, and an isolation of not <34 dB. The measured results agree with the prediction.