High Power and High Efficiency GaN Power Amplifiers for Ku/Ka-Bands Wireless Communication Systems

2019 ◽  
Author(s):  
Takuma Torii ◽  
Yutaro Yamaguchi ◽  
Keigo Nakatani ◽  
Masatake Hangai ◽  
Shintaro Shinjo
Keyword(s):  
Wireless Communication ◽  
High Power ◽  
Power Amplifiers ◽  
Communication Systems ◽  
High Efficiency ◽  
Wireless Communication Systems

scholarly journals High efficiency Doherty power amplifiers for modern wireless communication systems: A brief review

2021 ◽  
Vol 23 (3) ◽  
pp. 1855
Author(s):  
Mussa Mabrok ◽  
Zahriladha Zakaria ◽  
Tole Sutikno
Keyword(s):  
Wireless Communication ◽  
Power Amplifiers ◽  
Communication Systems ◽  
High Performance ◽  
High Efficiency ◽  
Average Power ◽  
Wireless Communication Systems ◽  
Saturation Power ◽  
Low Efficiency ◽  
Suitable Technique

Due<span lang="EN-MY">to the high peak to average power ratio (PAPR) of modern modulated signals, power amplifiers (PAs) have been forced to operate at the back-off (BO) region of their saturation power in order to avoid signal clipping and distortion. However, classical PAs suffer from low efficiency in the BO region operation. Therefore, efficiency has to be enhanced in that region. Many techniques have been proposed. Among them, the Doherty power amplifier (DPA) is considered as the most suitable technique due to its simple structure and high performance. However, its conventional design is limited to a 6 dB BO level, which does not satisfy the requirements of modern communication systems. In this paper, a brief review of the most significant techniques of high-efficiency DPA is presented. First, DPA topology and its operation principles are briefly discussed. Second, efficiency enhancement techniques such as an asymmetrical DPA, output combiner modification, gate bias adaption, offset line optimization, and multi-way DPA were discussed. The study shows that the most suitable, simple, and effective solution is an asymmetrical approach. However, it needs to be investigated in terms of bandwidth in order to meet the efficiency-bandwidth requirements of modern wireless communication systems such as </span>5G.

scholarly journals A High Efficiency Antenna Array for Wireless Communication Systems

2020 ◽  
Vol 932 ◽  
pp. 012089
Author(s):  
Zahraa A. Jawad ◽  
Joolan N. Alwan ◽  
Hussam H. Abed
Keyword(s):  
Wireless Communication ◽  
Antenna Array ◽  
Communication Systems ◽  
High Efficiency ◽  
Wireless Communication Systems

Analysis and design of class-O RF power amplifiers for wireless communication systems

2016 ◽  
Vol 89 (2) ◽  
pp. 317-325 ◽  
Author(s):  
Muhammad Abdullah Khan ◽  
Ahmed F. Aref ◽  
Mohsin M. Tarar ◽  
Renato Negra
Keyword(s):  
Wireless Communication ◽  
Power Amplifiers ◽  
Communication Systems ◽  
Wireless Communication Systems ◽  
Rf Power Amplifiers ◽  
Rf Power ◽  
Analysis And Design

Wide-Band High-Efficiency Printed Loop Antenna Design for Wireless Communication Systems

2005 ◽  
Vol 54 (3) ◽  
pp. 873-878 ◽  
Author(s):  
T.A. Denidni ◽  
H. Lee ◽  
Y. Lim ◽  
Q. Rao
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
High Efficiency ◽  
Wide Band ◽  
Loop Antenna ◽  
Antenna Design ◽  
Wireless Communication Systems

High power Al0.3Ga0.7As∕In0.2Ga0.8As enhancement-mode PHEMT for low-voltage wireless communication systems

2002 ◽  
Vol 38 (18) ◽  
pp. 1063 ◽  
Author(s):  
S.H. Chen ◽  
Li Chang ◽  
E.Y. Chang ◽  
J.W. Wu ◽  
Chun-Yen Chang
Keyword(s):  
Wireless Communication ◽  
High Power ◽  
Communication Systems ◽  
Low Voltage ◽  
Wireless Communication Systems ◽  
Enhancement Mode
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