An analog compensation method for asymmetric IMD characteristics of a power amplifier

IEEE MTT-S International Microwave Symposium Digest, 2003 Pub Date : 2003-06-08 DOI:10.1109/MWSYM.2003.1212617

K. J. Cho, J. Choi, J.H. Kim, B.J. Lee, N.Y. Kim, J.C. Lee, S. Stapleton

引用次数: 1

Abstract

The modulation frequency affects the asymmetric intermodulation distortion (IMD) products of a RF power amplifier. This effect reduces IMD cancellation performance of power amplifiers in connection with predistortion linearization. A phase extraction method to determine phase difference between upper and lower 3/sup rd/ order IMD products and a phase compensation circuit using an envelope injection technique is proposed. The experimental results demonstrate a significant improvement in the 3/sup rd/ order IMD cancellation performance.

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功率放大器不对称IMD特性的模拟补偿方法

调制频率对射频功率放大器的非对称互调失真(IMD)产生影响。这种影响降低了与预失真线性化相关的功率放大器的IMD抵消性能。提出了一种确定上下3/sup /阶IMD产品相位差的相位提取方法和一种采用包络注入技术的相位补偿电路。实验结果表明，该方法能显著改善3/sup / order的IMD对消性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE MTT-S International Microwave Symposium Digest, 2003

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