Design of a Broadband High-Efficiency Hybrid Class-EFJ Power Amplifier

This letter proposes a novel broadband, high-efficiency power amplifier (PA). The high-efficiency characteristics of Class-EF PAs and the large bandwidth advantages of Class-J PAs are effectively combined in the proposed PA. By theoretically analyzing the impedances of traditional Class-EF PAs and c...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 30; no. 4; pp. 407 - 409
Main Authors Zhang, Zhiwei, Cheng, Zhiqun, Ke, Huajie, Liu, Guohua, Li, Sudong
Format Journal Article
LanguageEnglish
Published IEEE 01.04.2020
Subjects
Bandwidth
Broadband
Broadband communication
class-EFJ
Harmonic analysis
high efficiency
Hybrid power systems
Impedance
power amplifier (PA)
Power generation
Wireless communication
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Summary:This letter proposes a novel broadband, high-efficiency power amplifier (PA). The high-efficiency characteristics of Class-EF PAs and the large bandwidth advantages of Class-J PAs are effectively combined in the proposed PA. By theoretically analyzing the impedances of traditional Class-EF PAs and class-J PAs, we can consider the possibility of combining these two types of PAs. The conditions that need to be met are derived. In order to verify the effectiveness of the proposed method, a high-efficiency wideband Class-EFJ PA is designed and fabricated by using CGH40010F GaN HEMT. The measurement results demonstrate that the Class-EFJ PA has saturated output power of 40.5-42.7 dBm in 1.2-3.6 GHz. Drain efficiency of 63%-73% was achieved over the same frequency band. The Adjacent Channel Leakage Ratio (ACLR) was also better than −31.2 dBc at an average output power of 35.6 dBm.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2020.2973487