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A filtering impedance transformer with high transforming ratio
Author(s) -
Chen Shiyong,
Li Meng,
Yu Yantao,
Tang Mingchun
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.31256
Subject(s) - transformer , return loss , electrical impedance , quarter wave impedance transformer , materials science , insertion loss , electrical engineering , electronic engineering , impedance matching , acoustics , engineering , physics , damping factor , voltage , antenna (radio)
Abstract A filtering impedance transformer with high transforming ratio and good suppression out of band is presented in this article. Design parameters of the proposed configuration are analyzed. For verification, a 50 to 500 Ω transformer operating at 3 GHz has been designed, fabricated, and measured. The measured maximum insertion is about 0.87 dB and the measured return loss is better than 18 dB from 2.71 to 3.29 GHz, which are in good agreements with the simulated ones.