E类功率放大器负载变化对工作特性的影响分析

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Abstract In practical situation, the terminal load of class E power amplifier may deviate from the theoretical design values to make the operating characteristics changing, even be damaged. In this paper, the circuit parameters of the class E power amplifier is analyzed theorectically. The analytical relationships between parameters of output power, efficiency, drain voltage and load are obtained and are verified by Saber simulation and actual circuit test. The results show that the output power and the working efficiency are decreased when the load deviates from the optimal load. When the load decreases, the peak of switch drain voltage and current rise to increase the switch stress of voltage and current. The derived theoretical results can determine the allowable range of the load in class E power amplifier and provide important reference for circuit design and analysis of class E power amplifier in variable load condition.

Key words： Class E power amplifier load variation output power working efficiency switch stress

Received: 22 October 2013 Published: 13 April 2015

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TM133

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	Articles by authors
	Deng Sijian
	Tan Jianwen
	Liao Ruijin
	Ye fangwei
	Zeng Deping
	Liu Qingsong

Cite this article:

Deng Sijian,Tan Jianwen,Liao Ruijin等. Load Variation Effect on Performance of Class E Power Amplifier[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 98-105.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I4/98

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