基于集成电桥的小型化Doherty功放设计和应用  

Design and Application of Miniaturized Doherty Power Amplifier Based on Integrated Bridge

作　　者：李雪平 LI Xueping(Comba Network Systems Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]京信网络系统股份有限公司,广东广州510663

出　　处：《通信电源技术》2022年第15期59-64,共6页Telecom Power Technology

摘　　要：在基站通信的下行链路设计中,Doherty功放作为一种行之有效的效率提升手段得到了广泛应用。经典的Doherty架构是通过微带线形式,基于有源负载牵引理论实现高回退功率下效率的提升。微带线形式的阻抗变换单元尺寸跟波长息息相关,这种架构在高频段具有比较明显的优势,而在1 GHz以下频段,微带形式阻抗变换架构的尺寸较大,不利于产品的小型化设计。利用集成电桥实现微带形式的阻抗变换,较大程度地缩小了整体的设计尺寸,有利于集成化设计。In the downlink design of base station communication,Doherty power amplifier technology has been widely used as an effective means to improve efficiency.The classical Doherty architecture is based on active load traction theory through microstrip line to improve the efficiency under high back-off power.The size of microstrip impedance transformation unit is closely related to wavelength,and this architecture has obvious advantages in high frequency band,while in the frequency band below 1 GHz,the size of microstrip impedance transformation architecture is large,which is not conducive to the miniaturization design of products.Using integrated bridge to realize impedance transformation in microstrip form greatly reduces the overall design size,which is beneficial to integrated design.

关 键 词：功率放大器 DOHERTY 集成电桥 有源负载牵引 阻抗匹配 负载调制网络 

分 类 号：TN722[电子电信—电路与系统]