This study presents an automated high-accuracy optimization approach for designing high-performance radio frequency high power amplifiers (HPAs). The amplifier is designed by applying a top-down pruning optimization approach that automatically converts the given HPA with lumped elements (LEs) to the HPA with distributed elements (DEs). Firstly, the lumped element HPA is designed based on a bottom-up optimization presented in Kouhalvandi et al. (2019 11th international conference on electrical and electronics engineering (ELECO), pp 510–513, 2019, 10.23919/ELECO47770.2019.8990407), then the LE amplifier is decomposed into basic unit cells that consist of one capacitor (C) and one inductor (L). For each LC unit, a suitable transmission line cell network is selected from predefined models by considering the maximum a posterior (MAP) metric. The component values of the resulting HPA design with DEs are optimized using Bayesian Optimization to achieve the desired design specifications. The overall proposed automated optimization accelerates the design process and outperforms the amplifier’s specifications that is constructed with DEs, automatically. The optimization starts with LE amplifier designs for keeping high linear gain performance and is converted to the HPA with transmission lines for having ready to fabricate circuit design. The proposed approach is validated by designing three HPAs with GaN HEMT from 1.8 to 2.2 GHz operational band frequency with drain efficiency more than 50% and with minimum linear power gain of 14.5 dB in all band frequency.

这项研究提出了一种用于设计高性能射频大功率放大器（HPA）的自动化高精度优化方法。该放大器通过采用自上而下的修剪优化方法进行设计，该方法将给定的具有集总元素（LE）的HPA自动转换为具有分布式元素（DE）的HPA。首先，基于自下而上的优化设计集总元素HPA在Kouhalvandi等人中提出。（2019年第11届国际电气和电子工程（ELECO）会议，pp 510–513，2019，10.23919 / ELECO47770.2019.8990407），然后将LE放大器分解为基本单元，该单元由一个电容器（C）和一个电感器（ L）。对于每个LC单元，通过考虑最大后验（MAP）度量从预定义模型中选择合适的传输线单元网络。使用贝叶斯优化技术优化了带有DE的HPA设计的组件值达到所需的设计规格。总体上提出的自动优化功能可加速设计过程，并自动超过由DE构成的放大器规格。优化从LE放大器设计开始，以保​​持高线性增益性能，然后通过传输线转换为HPA，以准备制造电路设计。通过设计三个GaN HEMT，工作频率为1.8至2.2 GHz的GaN HEMT，其漏极效率超过50％，并且在所有频带中的最小线性功率增益为14.5 dB，从而验证了该方法的有效性。