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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Efficiency and linearity enhancement of a two-stage X-band PA through simultaneous gate and drain supply modulation
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Efficiency and linearity enhancement of a two-stage X-band PA through simultaneous gate and drain supply modulation

机译：通过同时闸门和漏极电源调制，两级X波段PA的效率和线性增强

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摘要

This study addresses an analogue method for mitigating the non-linearities introduced by discrete supply modulation of a high-efficiency power amplifier (PA). A 10 W two-stage X-band gallium-nitride monolithic microwave integrated circuit ( PA with a peak power-added efficiency of 55%, is tested with drain supply modulation from 10 to 20 V with an increase in efficiency and substantial degradation in linearity. In this work, the authors characterise the two-stage PA dynamically to develop shaping functions for both gate bias voltages. They demonstrate that gate modulation can improve back-off gain and linearity, specifically when gate biases of the two stages of a PA are independently modulated. Simultaneous gate and drain modulation results in 15 percentage point improvement in efficiency over a static supply, and a consistent improvement in noise power ratio over a static supply, for a 20 MHz noise-like signal. Results with a 20 MHz long-term evolution signal show comparable improvement in efficiency while maintaining adjacent channel power ratio near the level of the PA with a static supply.
机译：该研究解决了用于减轻通过高效功率放大器（PA）的离散供电调制引入的非线性的模拟方法。 10 W两级X频段镓 - 氮化物单片微波集成电路（PA具有55％的峰值电力增加55％，随着10至20V的排水供应调制测试，随着效率和线性度的显着降解。作者在这项工作中动态地表征了两阶段PA，为两个栅极偏置电压开发成形功能。他们证明栅极调制可以提高退避增益和线性，特别是当PA的两个阶段的栅极偏置时独立调制。同时栅极和漏极调制导致静态供应的效率的15个百分点，以及静电电源的噪声功率比的一致性提高，适用于20MHz的噪声信号。结果20 MHz长 - 术语演化信号显示效率的相当优化，同时保持与静态电源的PA水平附近的相邻信道功率比。

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