This letter presents the design of a broadband power amplifier (PA) that achieves, over the 0.45–3.4-GHz frequency band, an output power between 41.5 and 44.3 dBm and a power added efficiency (PAE) higher than 54%. A four-section transformer has been adopted as the output-matching network in order to target the impedance region defined by a simplified prediction of the power and efficiency contours. The designed PA can find application in flexible hardware for 5G applications, as well as in broadband radar and countermeasure systems.

中文翻译：

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基于功率效率轮廓估计的宽带功率放大器设计

这封信介绍了宽带功率放大器 (PA) 的设计，该放大器在 0.45–3.4-GHz 频带上实现了 41.5 到 44.3 dBm 之间的输出功率和高于 54% 的功率附加效率 (PAE)。已采用四节变压器作为输出匹配网络，以针对功率和效率轮廓的简化预测所定义的阻抗区域。设计的 PA 可用于 5G 应用的灵活硬件以及宽带雷达和对抗系统。