Open AccessFiltering push–pull power amplifier based on novel impedance transformers
Author(s) -
Zhang Bo,
Dong Gaoya,
Wu Yongle,
Yu Cuiping,
Liu Yuanan
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.2010
Subject(s) - impedance matching , transformer , amplifier , electronic engineering , quarter wave impedance transformer , electrical impedance , electrical engineering , resonator , image impedance , input impedance , output impedance , engineering , computer science , topology (electrical circuits) , damping factor , voltage , cmos
A novel filtering push–pull power amplifier (PPPA), based on unbalanced‐to‐balanced impedance transformers, is presented for the first time. This novel impedance transformer can not only simplify the PPPA topology and miniaturise the overall circuit size, but also provide the bandpass filtering response and improve the second harmonic suppression performance. The proposed impedance transformers, which are constructed by two different C‐type line resonators, can provide good impedance matching performance under the odd‐mode excitation, while achieve high common mode suppression under the even‐mode excitation. Finally, a PPPA is designed and fabricated with the centre frequency of 2.45 GHz and bandwidth of 200 MHz for WLAN application. Moreover, detailed explanation and measured results are demonstrated for verification.