新型三等分Wilkinson功分器在高效率功放中的应用  

Application of New Trisected Wilkinson Power Divider in High Efficiency Power Amplifier

作　　者：陈慰[1] 陶学敏[2] 赵娜[1] 

机构地区：[1]航天恒星空间技术应用有限公司,西安710077 [2]重庆大学通信工程学院,重庆400030

出　　处：《电讯技术》2011年第8期138-142,共5页Telecommunication Engineering

摘　　要：针对一种新型的三路Doherty功率放大器,为满足其对称结构要求,在传统对称结构二等分功分器基础上,结合三路Doherty功放电路尺寸,通过理论计算和采用ADS软件仿真的方法设计了对称结构三等分Wilkinson功分器。其尺寸为19 mm×11 mm,在2.11~2.17 GHz内,插入损耗小于0.4 dB,输出端口隔离度大于16 dB,端口回波损耗大于13 dB。在适应三路Doherty功放对称结构的前提下,功分器性能指标满足功放电路三路相位一致性设计要求,提高了放大器工作效率,测试结果显示饱和点工作效率高于两路Doherty功率放大器。In a new three- way Doherty PA （Power Amplifier） design, based on the traditional symmetrical structure power divider and according to the circuit size of the new PA, a trisected Wilkinson power divider with symmetrical structure is designed through theoretical calculation and simulation using ADS software. The size of the new power divider is 19 mm × 11 mm, in 2.11 - 2.17 GHz, the insertion loss is less than 0.4 dB, the iso- lation is more than 16 dB, and the return loss is more than 13 dB. On the basis of suiting for the structure of the three- way Doherty PA, the new power divider meets the phase consistance design requirements of the PA circuit and improves the efficiency of the PA. The test results show that the efficiency of saturation power is higher than that of the two- way Doherty power amplifiers.

关 键 词：高效率功放 WILKINSON功分器 对称结构 相位一致性 

分 类 号：TN73[电子电信—电路与系统]