A Doherty amplifier with maximally flat efficiency in the bandwidth

2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI:10.1109/MWSYM.2013.6697335

R. Giofré, L. Piazzon, P. Colantonio, F. Giannini

引用次数: 2

Abstract

This contribution presents a creative circuit level solution to improve the efficiency versus frequency response of the Doherty amplifier. The proposed approach is compared with the conventional one and experimentally validated through a practical prototype realization based on GaN-HEMTs. Continuous wave measurements have shown a 65%-51% efficiency at about 42-36.5-dBm output power from 1.95-GHz to 2.25-GHz. When tested with a mobile WiMAX signal with 5MHz bandwidth and 9.3-dB Peak-to-Average Power Ratio (PAPR), the Doherty amplifier achieved an average efficiency around 50% with an Adjacent Channel Power Ratio (ACPR) lower than -38-dBc. Similar performances have been registered using a signal with 48-MHz bandwidth and 10.3-dB PAPR.

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带宽效率最高的多尔蒂放大器

这一贡献提出了一种创造性的电路级解决方案，以提高多尔蒂放大器的效率与频率响应。将该方法与传统方法进行了比较，并通过基于gan - hemt的实际样机实现进行了实验验证。连续波测量表明，在1.95 ghz至2.25 ghz范围内，在42-36.5 dbm输出功率下，效率为65%-51%。在5MHz带宽和9.3 db峰均功率比(PAPR)的移动WiMAX信号中进行测试时，Doherty放大器的平均效率约为50%，相邻通道功率比(ACPR)低于-38 dbc。使用48 mhz带宽和10.3 db PAPR的信号也记录了类似的性能。

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

2013 IEEE MTT-S International Microwave Symposium Digest (MTT)

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