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本文提出一种针对5G手机的双自适应偏置Doherty功率放大器(DPA)，通过双自适应偏置方案来容忍负载变化，解决了传统DPA对负载变化敏感的问题，在保持高效率的同时适应高PAPR和宽带宽需求。
In modern mobile communications, a high peak-to-average power ratio (PAPR) and a broadband bandwidth are essential for realizing high data-rate communication links. However, a high amplifier efficiency is crucial for a long battery life. Doherty power amplifiers (DPAs) have the potential to satisfy these requirements. However, the DPA technology is not widely utilized in existing handsets because DPAs are sensitive to load variations. Load-variation sensitivity has been extensively studied in recent years. Reconfigurable structures with a 90-degree hybrid combiner [1] face size and loss limitations at the switch. Technologies that vary the input signal and supply [2,3] require additional components and are unsuitable for handsets. Moreover, such technologies [1–3] require an impedance-sensing system (ISS), further constraining their size and cost. In terms of performance, existing control technologies [1–3] can only achieve an effective signal
Shohei Imai, Hideyuki Sato, Kenji Mukai, Hiroshi Okabe
Murata, Kyoto, Japan