一种双波段可重构功率放大器仿真设计

可重构输入匹配采用一种基于L型的电路结构,通过一个单刀单掷开关电路使该结构接入一段微带线,实现不同工作频率下输入阻抗的自动补偿。输出匹配实现并发双频段工作,在早期三段式微带线的基础上重新进行公式推导,提出了更易实现的四段微带线串联结构。该功率放大器采用了可重构结构与并发双波段匹配网络结合的方式,因此只采用了一个开关。电路结构简单,且开关切换时对电路性能影响较小。仿真结果表明,该功率放大器的匹配状态和性能良好,为现有的可重构功率放大器设计提供了一种思路。

Simulation Design of a Dual-Band Reconfigurable Power Amplifier

Reconfigurable input matching adopted a L-shaped circuit structure, which was connected to a section of microstrip line through a single-pole single-throw switch circuit to realize automatic compensation of input impedance at different operating frequencies. The output matching realized concurrent dual-frequency work. The formula was re-derived on the basis of the early three-section microstrip line, and a four-section microstrip line structure in series that was easier to implement was proposed. The power amplifier adopted a reconfigurable structure combined with a concurrent dual-band matching network, so only one switch was used. The circuit structure was simple, and the switch had a small effect on circuit performance. The simulation results showed that the matching state and performance of the power amplifier were good, which provided an idea for designing the existing reconfigurable power amplifiers.