Efficiency improvement of Doherty power amplifiers using supply switching and gate bias modulation
Efficiency improvement of Doherty power amplifiers using supply switching and gate bias modulation
复制标题
使用电源开关和栅极偏置调制提高 Doherty 功率放大器的效率
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
P. Balsara
中科院分区：
文献类型：
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作者：
S. Modi;N. Yanduru;P. Balsara
针对Doherty功率放大器，提出了一种新的低成本效率改进技术，该技术将电源开关与典型的负载调制相结合。此外，该技术采用栅极偏置调制来提供增益并使效率最大化。所提出的技术进行了研究与商业原型GaN PA。对5 MHz LTE信号的测量和仿真结果表明，该技术将Doherty PA的平均功率附加效率（PAE）显著提高到约55%。
A new low cost efficiency improvement technique is proposed for Doherty power amplifiers (PA), which combines supply switching with typical load modulation. In addition, the technique employs gate bias modulation to provide gain and maximize efficiency. The proposed technique was investigated with a commercial prototype GaN PA. Measurement and simulation results for a 5 MHz LTE signal showed that the proposed technique significantly improved the average power-added efficiency (PAE) of Doherty PA to ~55 %.