Analysis and design of a novel concurrent Class B/J continuum power amplifier

Analysis and design of a novel concurrent Class B/J continuum power amplifier
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一种新型并行B/J类连续功率放大器的分析与设计

DOI:
10.1002/mmce.22275
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发表时间:
2020-05
影响因子:
1.7
通讯作者:
Liu Yuanan
Liu Yuanan
中科院分区:
工程技术4区
文献类型:
--
作者:
Huang Hang;Yu Cuiping;Wu Yongle;Jin Qiuyan;Fan Chuanchao;Gao Jinchun;Liu Yuanan

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提出了一种基于电流和电压波形整形的B/J类并发连续模式。研究了并行双频模式下功率放大器的工作特性和性能。根据对并行模式的分析,在基波、谐波和互调(IM)频率处的最佳负载阻抗与两个载波的幅度比有关。与Class-B并行模式相比,该模式下的参数alpha、beta可以独立配置,在不降低输出功率和漏极效率的前提下,为设计提供了更大的自由度和灵活性。为了验证所提出的理论,一个1.9/2.35 GHz的双频功率放大器基于提出的并发模式的设计,制作和测量。实验结果表明,在峰均功率比(PAPR)为9.2dB的情况下,当两个10 MHz的LTE信号同时驱动PA时,PA的总平均功率为36.0dBm,漏极效率为40.6%,具有良好的并发性能。
In this paper, a novel concurrent Class B/J continuum mode is presented based on waveform shaping of current and voltage. The behavior characteristics and performances of power amplifiers (PAs) in concurrent dual-band mode are investigated in detail. According to the analysis of proposed concurrent mode, the optimal load impedances at fundamental, harmonic and intermodulation (IM) frequencies are related to the magnitude ratio of the two carriers. Comparing with concurrent Class-B mode, two parameters alpha, beta can be configured independently in the proposed concurrent mode, which provides more freedom and flexibility for design without output power and drain efficiency degradation. In order to verify the proposed theory, a 1.9/2.35 GHz dual-band power amplifier based on proposed concurrent mode is designed, fabricated and measured. Experimental results show that when the PA is driven by two 10 MHz LTE signals concurrently with total 9.2 dB peak-to-average power ratio (PAPR), the total average power is 36.0 dBm with 40.6% drain efficiency, which indicates a good concurrent performance.
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