2.45 GHz单级低噪声放大器的设计  

Design of a Single-stage Low Noise Amplifier for 2. 45 GHz Application

作　　者：汪海鹏[1] 杨曙辉[1,2] 陈迎潮[1,2] 冯梦璐[1] 

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100101 [2]南卡罗莱纳大学电气工程系,美国哥伦比亚29208

出　　处：《科学技术与工程》2015年第23期160-163,共4页Science Technology and Engineering

基　　金：国家自然科学基金(61171039)资助

摘　　要：设计了一种基于高电子迁移率晶体管ATF54143的单级低噪声放大器,采用ADS软件进行了设计优化。仿真结果表明在2.45 GHz处噪声系数小于1.5 d B,增益大于16.4 d B,稳定系数大于1.1,输入与输出的电压驻波比都小于1.1。在仿真基础上进行了实物加工,实测结果在2.45 GHz处|S21|为8.3 d B,|S11|和|S22|最小值分别为-13.5 d B,-17.2 d B,1 d B压缩点的输出功率约为10 d Bm。该放大器可应用于S波段的无线局域网,射频识别和北斗导航系统等领域。A single-stage low noise amplifier（LNA） based on high electron-mobility transistor ATF54143 was demonstrated. ADS was adopted to simulate and optimize the circuit. The simulation results show that the LNA has a noise figure less than 1.5 dB, a gain of 16.4 dB and the input/output VSWR less than 1.1 at 2. 45 GHz, the sta- bility factor greater than 1. 1. After simulation and manufacture, the measurements of the LNA are presented. The magnitude of S21 achieves 8.3 dB at 2.45 GHz, while the minimum magnitudes of Sn and S22 reach - 13.5 dB, -17.2 dB, respectively. The LNA has an output 1 dB compression point （P1 ds） of -10 dBm. The LNA can be used in WLAN, RFID and BeiDou navigation system for S-band application.

关 键 词：低噪声放大器 噪声系数 增益 稳定系数 电压驻波比 

分 类 号：TN722.3[电子电信—电路与系统]