Load Mismatch Compensation of Load-Modulated Power Amplifiers: A Comprehensive Review

Yufeng Zang, Weimin Shi (), Jinting Liu, Tian Qi and Mingyu Li
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Yufeng Zang: School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
Weimin Shi: School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
Jinting Liu: School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
Tian Qi: School of Engineering, Huanghe Science and Technology University, Zhengzhou 450006, China
Mingyu Li: School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China

Energies, 2025, vol. 18, issue 9, 1-13

Abstract: With the diversification, acceleration, and arraying of wireless communication systems, power amplifiers (PAs) face stricter demands in terms of RF operation bandwidth, high-efficiency power range, and load mismatch compensation. After years of development, load-modulated PAs (LMPAs) can maintain high efficiency over a wide bandwidth and a larger output back-off (OBO) range. However, there is obvious performance degradation when the load impedance of the current LMPAs is mismatched. To ensure the perfect application of power amplifiers in wireless communication systems, load mismatch compensation methods should be developed for LMPAs. Therefore, this paper gives a comprehensive review on the load mismatch compensation techniques of LMPAs, including the Doherty power amplifier and load-modulated balanced amplifier.

Keywords: power amplifier; load mismatch; load modulation; high efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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