摘要
文章提出了采用S参数获得功率场效应管的输入输出阻抗的方法。在对PA绝对稳定性分析的基础上,采用基于有限元思想的MOMENTUM法设计匹配网络,在设计中将高频寄生和耦合效应加以考虑,提高了设计的准确性。对PA进行了热分析与设计,提出了加入铜载体来改善大功率器件结温的方法,来满足温度设计的要求。成功研制出电路尺寸为96.4mm×23mm的小型化三级PA。试验测试结果为:1dB带宽为125MHz(1 647MHz～1 772MHz)、P_(-1)为38.75dBm、增益为51dB、PAE为37.2%。
The method that obtaining the input and out impedance of power transistor by S parameter , is presented. The high frequency parasitic and coupling effect are considered by using the MOMENTUM method to design matching network to improve the design accuracy basing on the analysis of unconditional stability. Thermal design of PA （ Power Amplifier） is made, then the way of adding copper carrier to improve the junction temperature of high power transistor is presented to meet the need of temperature. A 3-stage microwave power amplifier of 96.4mm ×23mm is developed. Experiment measure shows that the ldB bandwidth is 125MHz, P-I is 38.75dBm, gain is 51dB and PAE is 37.2%.
出处
《空间电子技术》
2009年第4期99-103,111,共6页
Space Electronic Technology
关键词
微波功率放大器
矩量法
热设计
Microwave power amplifier Momentum method Thermal design
