基于CGH40010F的连续F类功率放大器仿真与设计

Simulation and design of class⁃F continuous power amplifier based on CGH40010F

针对通信技术对通信基站射频前端指标要求日益增高的问题,为了设计更大带宽、更高效率的功率放大器,文中对连续F类功放的设计理论进行深入研究。基于CREE公司的CGH40010F高功率管完成了功放的设计、仿真、制作与调试。在仿真软件的选择上,文中使用的仿真环境为ADS;而在功放制作加工上,文中使用FR4射频板。测试结果表明,所设计的功放在1.7~2.7 GHz工作带宽内,可以实现大于39.5 dBm的输出功率和大于65%的效率。同时,为了解决功放的效率与线性度间的矛盾,对功放进行预失真实验。实验结果表明,在2.6 GHz的工作频点,功放在33 dBm输出时,ACPR可以从-34.5/-33.6 dBc降低为-47.4/-48.3 dBc。

The development of communication technology results in a higher demand for the RF front⁃end index of communication base station.In order to design a power amplifier with larger bandwidth and higher efficiency,the design theory of class⁃F continuous power amplifier is studied in this paper.Design,simulation,manufacture and debugging of the power amplifier are completed on the basis of high power transistor CGH40010F made by Cree Company.In the selection of simulation software,the simulation environment used in this paper is ADS.In the production and processing of power amplifier,FR4 RF board is used.The testing results show that the designed power amplifier can achieve the output power of more than 39.5 dbm and the efficiency of more than 65%in the working bandwidth of 1.7~2.7 GHz.In order to solve the contradiction between the efficiency and linearity of the power amplifier,the predistortion experiment was carried out.The experimental results show that when the output of the power amplifier is 33 dBm at 2.6 GHz,the ACPR can be reduced from-34.5/-33.6 dBc to-47.4/-48.3 dBc.