Load Insensitive Doherty PA Using Load Dependent Supply Voltages
Load Insensitive Doherty PA Using Load Dependent Supply Voltages
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使用负载相关电源电压的负载不敏感 Doherty PA
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
J. Pedro
中科院分区：
文献类型：
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作者：
Cristiano F. Gonçalves;Filipe M. Barradas;L. Nunes;P. Cabral;J. Pedro
本文提出了最佳的载波和峰值漏极电压，以保持输出功率的能力和回退水平的多尔蒂功率放大器（PA）工作在非最佳负载。这些电压理论上是从回退和全功率条件下获得的。传统的Doherty和建议的负载不敏感的版本的模拟之间的性能比较，表明所介绍的理论可以是非常有利的负载变化的情况下操作。设计了一种3.6 GHz负载不敏感Doherty功率放大器，并对分布在2.0电压驻波比圆内的负载进行了测量。这些测量验证了所介绍的理论，显示出几乎恒定的最大输出功率（42.9 - 43.2 dBm），以及在5.0 dB和6.2 dB之间变化的回退电平。6 dB输出功率回退效率在42%和53%之间变化，其中最高的退化对应于具有高虚部的负载。
This paper presents optimal carrier and peaking drain voltages to preserve the output power capability and back-off level of Doherty power amplifiers (PAs) operating for non-optimal loads. These voltages are theoretically obtained from back-off and full power conditions. A performance comparison between simulations of a conventional Doherty and the proposed load insensitive version is presented, showing that the introduced theory can be very advantageous for operation under load varying scenarios. A 3.6 GHz load insensitive Doherty PA was designed, implemented and measured for loads distributed inside a 2.0 voltage standing wave ratio circle. These measurements validated the introduced theory, showing an almost constant maximum output power (42.9 – 43.2 dBm), and a back-off level varying between 5.0 dB and 6.2 dB. The 6-dB output power back-off efficiency varies between 42 % and 53 %, in which the highest degradation corresponds to loads with high imaginary parts.