一种用于多标准接收机的宽带低噪声放大器  

A wideband low noise amplifier for multi-standard receivers

作　　者：王科平[1] 王志功[1] 雷雪梅[1,2] 李伟[1] 

机构地区：[1]东南大学射频与光电集成电路研究所,南京210096 [2]内蒙古大学电子信息工程学院,呼和浩特010021

出　　处：《高技术通讯》2009年第11期1176-1180,共5页Chinese High Technology Letters

基　　金：863计划(2007AA01Z2b1);教育部博士点基金(20070286002)资助项目

摘　　要：设计了一种应用于软件无线电接收机的300kHz～1.6GHz宽带低噪声放大器,适用于数字广播、数字电视和定位导航等系统。该放大器采用噪声抵消结构以降低输入匹配器件在输出端所产生的热噪声和闪烁噪声,能够同时实现输入阻抗匹配和噪声优化。对采用中芯国际(SMIC)0.18μm RF CMOS工艺实现的芯片的测试结果表明,3dB带宽为300kHz～1.6GHz,最大增益S_(21)为16.7dB,输入反射系数S_(11)小于-7.4dB,最小噪声系数为2.3 dB,输入参考的1dB增益压缩点为-11.6dBm,功耗为14.4mW,芯片面积为0.49mm^2。A 300 kHz- 1.6 GHz wideband CMOS low noise amplifier （LNA） for software-defined radio receivers was designed. It is fit for the applications in digital radio, digital TV and global position systems. The channel thermal noise and the flicker noise of the input metal oxide semiconductor field effect transistor （MOSFET） is canceled by exploiting a noise canceling technique. A lower noise figure and an excellent wide-band input matching can be achieved at the same time. It was designed in SMIC＇ s 0.18 μm RF CMOS process. The measured results show that in the band of 300 kHz - 1.6 GHz, the maximum gain S21 is 16.7 dB, the input reflection factor S11 is lower than -7.4 dB, the minimum noise figure （NF） is 2.3 dB, and the input-referred 1-dB gain compression point is - 11.6 dBm. Its consuming power is 14.4 mW. The chip area is 0.49 mm^2.

关 键 词：低噪声放大器(LNA) 噪声抵消 软件无线电 宽带 

分 类 号：TN722.3[电子电信—电路与系统]