A 2.4-GHz CMOS Power Amplifier With an Integrated Antenna Impedance Mismatch Correction System
A 2.4-GHz CMOS Power Amplifier With an Integrated Antenna Impedance Mismatch Correction System
复制标题
具有集成天线阻抗失配校正系统的 2.4GHz CMOS 功率放大器
DOI：
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发表时间：
2014
影响因子：
5.4
通讯作者：
J. Kenney
中科院分区：
文献类型：
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作者：
Youngchang Yoon;Hyoungsoo Kim;Hyungwook Kim;Kun;Chang;J. Kenney
为了防止天线阻抗失配导致功率放大器 (PA) 性能下降，我们提出了一种具有自动天线失配校正系统的完全集成 PA。该方法仅使用电压幅度信息，降低了系统的复杂性，同时补偿所有失配阻抗角处的阻抗失配。所提出的 PA 采用 0.18μm CMOS 技术实现，测量结果表明，它在不匹配条件下保持了 1dB 增益变化点以及接近良好匹配条件的功率附加效率。据我们所知，这是第一个完全集成的 CMOS PA，能够自动恢复天线失配情况，无需片外组件的任何帮助。
To prevent the performance degradation of a power amplifier (PA) from an antenna impedance mismatch, we propose a fully integrated PA with an automatic antenna-mismatch correction system. Using only voltage amplitude information, this method reduces the complexity of the system while compensating impedance mismatch at all mismatched impedance angles. The proposed PA is implemented in 0.18- μm CMOS technology and the measurement results show it maintains its 1-dB gain variation point as well as power-added efficiency under the mismatched condition close to that of a well-matched condition. To the best of our knowledge, this is the first fully integrated CMOS PA that is capable of automatically recovering antenna-mismatch conditions without any help from the off-chip components.