一种回退效率增强宽带Doherty放大器的设计  

Design of a Back-Off Efficiency Enhancement Broadband Doherty Amplifier

作　　者：贾文强 于洪喜[1] 杨飞[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《电讯技术》2018年第1期91-95,共5页Telecommunication Engineering

摘　　要：提出给主功放分配多的功率来提高Doherty回退范围的功率转换效率。建立了数学模型,从理论上验证了回退范围的效率提高。电路测试证明,回退6 dB漏极效率大于59%,高同类宽带Doherty 7个百分点,峰值输出功率46.5 dBm。另外,对类集总传输线的解析公式进行修正,校正了原来公式在理论计算中存在的32.5%的误差确,缩短了设计时间,降低了设计难度。This paper proposes distributing more power to main amplifier to improve the power conversion efficiency of the back-off scope. A mathematical model is established,which theoretically verifies the effi-ciency enhancement of the regression. The circuit measurement proves that drain efficiency at 6 dB back-off is greater than 59% ,7 percentage points higher than that of other wide-band Doherty, and that peak power output is 46. 5 dBm. In addition, the analytical formula for the quasi-lumped transmission line is corrected in which there exists 32.5% error,thus reducing the time and difficulty of design.

关 键 词：宽带Doherty放大器 类集总传输线 回退效率 

分 类 号：TN722.7[电子电信—电路与系统]