WANG Qunliang, YU Pingping, JIANG Yanfeng. Design of balanced RF power amplifier for high linearity scenes[J]. 2021, (6): 92-94. DOI: 10.13873/J.1000-9787(2021)06-0092-03.
面向高线性场景的平衡式射频功放设计
摘要
在粒子加速器系统、大功率雷达的驱动级、高灵敏的射频传感系统等高线性领域
广泛采用甲类放大器。采用管芯结构为LDMOS的PTVA102001EA作为功率管
对输出匹配进行谐波控制
再对包含高频器件模型在内的电路版图进行Momentum电磁场联合仿真
完成一个具有谐波抑制功能的高线性平衡式功率放大器。其中心频率为1.1 GHz
带宽为100 MHz
输出功率为200 W
合成效率高达95%。所提设计思路可用于驱动级传感电路和射频功放系统设计。
Abstract
Class-A amplifiers are widely used in high-linearity fields such as particle accelerator system
driving stages of high-power radars
and highly sensitive RF sensing systems.The PTVA102001 EA with LDMOS is used as the power transistor.The output matching is controlled by harmonic
and the Momentum electromagnetic field co-simulation is performed in the circuit layout including the high-frequency device model.A high linear balanced power amplifier with harmonic rejection is completed.The center frequency is 1.1 GHz
the bandwidth is 100 MHz
the output power is 200 W
and the combining-efficiency is up to 95 %.This design idea can be used in the design of driving stage sensing circuit and RF power amplifier system.