用于雷达的LDMOS微波功率放大器设计  

Design of a LDMOS Microwave Power Amplifier for Radar

作　　者：韩红波[1] 郝跃[1] 冯辉[1] 任媛媛[2] 

机构地区：[1]西安电子科技大学,西安710071 [2]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2007年第1期89-93,共5页Fire Control Radar Technology

摘　　要：硅LDMOS晶体管以其大输出功率和高效率等优点作为微波功率放大器广泛应用于雷达发射机中。在大信号S参数无法获得而厂家提供的1710 MHz^2110 MHz范围内的源阻抗和负载阻抗参数又不能用时,利用一公司的ADS软件,采用负载牵引法得到了输入和输出阻抗。在对晶体管绝对稳定性分析的基础上,运用共轭匹配,成功设计出P-1大于30W、功率增益在1580MHz^1650 MHz频率范围内、增益保持在30dB以上和PAE大于30%的2级LDMOS微波功率放大器。同时,得到了最终的版图并且运用MOMENTUM对它进行了2.5D仿真,得到了理想的结果。Si-based LDMOS transistor is widely used as power amplifier in radar transmitter for its advantages of high output power and efficiency. In case of large-signal S parameters are difficult to achieved and source impedance and load impedance at 1710MHz-2110MHz provided by the manufacture is useless, a load-pull approach based on Agilent＇s ADS software is provided in order to obtain required input and output impedance. Through analyzing stability of the transistor, a two-stage LDMOS microwave power amplifier is successfully designed by using of conjugate match, parameters of the amplifier are as follows： P-1 is larger than 30W, power gain at 1580MHz-1650MHz is more than 30dB, and PAE is more than 30%. Perfect result is obtained through 2.5D simulation to the design by using of MOMENTUM.

关 键 词：LDMOS ADS 功率放大器 负载牵引法 共轭匹配 

分 类 号：V253[一般工业技术—材料科学与工程]