The Nested-Mode Power Amplifiers for Highly Efficient Multi-Octave Applications

The Nested-Mode Power Amplifiers for Highly Efficient Multi-Octave Applications
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适用于高效多倍频程应用的嵌套模式功率放大器

DOI:
10.1109/tmtt.2019.2947507
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发表时间:
2019-11
影响因子:
4.3
通讯作者:
Zhenghe Feng
Zhenghe Feng
中科院分区:
工程技术1区
文献类型:
--
作者:
Xiaofan Chen;Wenhua Chen;Fadhel M. Ghannouchi;Zhenghe Feng

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本文提出了一种新型的适用于高效率多倍频程应用的嵌套模式功率放大器(NMPA)。通过在基频和谐波频率处引入一组嵌套的保证区域(GR)作为目标设计空间,克服了谐波调谐多倍频程功率放大器(PA)中频率重叠所带来的困难,从而建立了多倍频程PA的自洽理论。此外,构造建议的嵌套GR的方法证明了基于一个简化的数值模型。根据该方法,可以通过以下几个定义良好的封闭形式的步骤来构造所需的嵌套GR。此外,一个可行的设计方法的NMPA的基础上建立一个简化的封装器件的去嵌入技术。基于所提出的理论和设计方法,设计并测试了1-3100 MHz的NMPA。测试结果表明,该功率放大器的漏极效率为57.5-73.9%,输出功率为39- 42.6dBm。此外,所设计的NMPA的线性度和线性化验证使用高达20 MHz的带宽调制信号在整个设计的频带伴随着数字预失真(DPD)程序。据我们所知,这是多倍频程宽带PA的最先进性能。
In this article, a novel nested-mode power amplifier (NMPA) is proposed for highly efficient multi-octave applications. By introducing a group of nested guaranteed regions (GRs) at the fundamental and harmonic frequencies as the target design space, the difficulties caused by frequency overlapping in harmonically tuned multi-octave power amplifiers (PAs) can be overcome, leading to a self-consistent theory of multi-octave PAs. Furthermore, the methodology of constructing the proposed nested GRs is demonstrated based on a simplified numerical model. According to the methodology, the desired nested GRs can be constructed by following several well-defined closed-form steps. In addition, a feasible design methodology of the NMPA is established based on a simplified deembedding technique of packaged devices. Based on the proposed theory and design method, a 1–3100-MHz NMPA is designed and measured. According to the measured results, the designed PA exhibits 57.5–73.9% drain efficiency and 39–42.6-dBm output power across the band. Moreover, the linearity and linearizability of the designed NMPA are verified using up to 20-MHz-bandwidth-modulated signals across the designed band accompanied with a digital predistortion (DPD) procedure. To the best of our knowledge, this is the state-of-the-art performance of multi-octave broadband PAs.
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