A novel RF power amplifier (RFPA) architecture, the orthogonal load-modulated balanced amplifier, or OLMBA, is described and demonstrated. Compared to the load-modulated balanced amplifier (LMBA), the OLMBA displays many of the same benefits, such as active adaptive tuning using the phase and amplitude of an external control signal, but with much lower power requirements on the control signal power (CSP). As such, a useful range of active tuning can be implemented with essentially no impact on overall efficiency due to the low level of a control signal. A demonstrator is described and measured, which delivers 30 W at a minimum of 50% efficiency over a 0.65–3.25-GHz bandwidth.

中文翻译：

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正交 LMBA：具有宽带可重构性的新型 RFPA 架构

描述并演示了一种新颖的 RF 功率放大器 (RFPA) 架构，即正交负载调制平衡放大器或 OLMBA。与负载调制平衡放大器 (LMBA) 相比，OLMBA 具有许多相同的优点，例如使用外部控制信号的相位和幅度进行有源自适应调谐，但对控制信号功率 (CSP) 的功率要求要低得多）。因此，由于控制信号的电平低，因此可以实现有用范围的有源调谐而对整体效率基本上没有影响。描述并测量了一个演示器，它在 0.65–3.25 GHz 带宽内以最低 50% 的效率提供 30 W 的功率。