Filtering push–pull power amplifier based on novel impedance transformers. Issue 17 (1st August 2016)

• Record Type: Journal Article
• Authors: Zhang, Bo; Dong, Gaoya; Wu, Yongle; Yu, Cuiping; Liu, Yuanan
• Is Part Of: Electronics letters. Volume 52:Issue 17(2016)
• Page Start: 1467
• Page End: 1469
• Publication Date: 2016-08-01
• Subjects: differential amplifiers -- UHF amplifiers -- UHF resonators -- impedance convertors -- band‐pass filters -- harmonics suppression -- impedance matching -- wireless LAN -- integrated circuit design -- UHF filters; filtering push–pull power amplifier -- unbalanced‐to‐balanced impedance transformers -- PPPA topology -- overall circuit size miniaturisation -- bandpass filtering response -- second harmonic suppression performance improvement -- C‐type line resonators -- impedance matching performance -- odd‐mode excitation -- common mode suppression -- even‐mode excitation -- WLAN application -- frequency 2.45 GHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.2010
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : 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.