High Efficiency Power Amplifier Based on Envelope Elimination and Restoration Technique

被引：8
|
作者：
Vasic, M. [1 ]
Garcia, O. [1 ]
Oliver, J. A. [1 ]
Alou, P. [1 ]
Diaz, D. [1 ]
Cobos, J. A. [1 ]
Gimeno, A. [2 ]
Pardo, J. M. [2 ]
Benavente, C. [2 ]
Ortega, F. J. [2 ]
机构：
[1] Univ Politecn Madrid, Ctr Elect Ind CEI, Madrid, Spain
[2] Univ Politecn Madrid, Radio Engn Grp GIRA, Madrid, Spain
来源：
2010 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION | 2010年
关键词：
Kahn's technique; envelope elimination and restoration; envelope amplifier; power amplifier; multilevel converter; TRANSMITTER; RF;
D O I：
10.1109/ECCE.2010.5617763
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Due to complex envelope and phase modulation employed in modern transmitters it is necessary to use power amplifiers that have high linearity. Linear power amplifiers (classes A, B and AB) are commonly used, but they suffer from low efficiency especially if the transmitted signal has high peak to average power ratio (PAPR). Kahn's technique based on envelope elimination and restoration (EER) is based on idea that high efficiency power supply (envelope amplifier) could be used to modulate the envelope of high efficient non linear power amplifiers (classes D or E). This paper presents solutions for power amplifier that performs envelope modulation and class E amplifier that is used as a non linear amplifier. The envelope amplifier is implemented as a multilevel converter in series with linear regulator and can provide up to 100 W of instantaneous power and reproduce 2 MHz sine wave. The implemented Class E amplifier can operate at 120 MHz with efficiency near to 85%. The envelope amplifier and class E amplifier have been integrated and efficiency and linearity of the implemented transmitter has been measured and presented.
引用
收藏
页码：3833 / 3840
页数：8
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