| 基于反馈技术的宽带低噪声放大器的设计 |
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| 引用本文： | 尤志刚,邓立科,杨小军,林先其.基于反馈技术的宽带低噪声放大器的设计[J].通信技术,2011,44(2):149-150,153. |
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| 作者姓名： | 尤志刚 邓立科 杨小军 林先其 |
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| 作者单位： | 1. 电子科技大学,四川,成都,611731
2. 中国西南电子技术研究所,四川,成都,610036 |
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| 摘 要： | 介绍了宽带放大器的设计方法和负反馈技术。选用增益高、噪声小的高电子迁移率晶体管（HEMT）ATF54143,利用负反馈和宽带匹配技术,设计制作了一个高增益低噪声放大器,并借助于安捷伦公司的微波电路仿真软件ADS进行仿真和优化。测试表明,在50-300 MHz的频率范围内,低噪声放大器的增益大于22 dB,平坦度小于±0.3 dB,噪声系数小于1.25,输入驻波小于1.4,输出驻波小于1.3。
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| 关 键 词： | 低噪声放大器 负反馈 噪声系数 宽带 |
Design of Broadband LNA based on Feedback Technique |
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| YOU Zhi-gang,DENG Li-ke,YANG Xiao-jun,LIN Xian-qi.Design of Broadband LNA based on Feedback Technique[J].Communications Technology,2011,44(2):149-150,153. |
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| Authors: | YOU Zhi-gang DENG Li-ke YANG Xiao-jun LIN Xian-qi |
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| Institution: | ① (①School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu Sichuan 610054,China; ②Southwest China Institute of Electronics Technology,Chengdu Sichuan 610036,China) |
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| Abstract: | The design method for broadband amplifier and the feedback technique is presented.The HEMT ATF54143 with high gain and low noise is selected for designing a LNA with negative feedback and broadband matching technique.The ADS software from Agilent is applied to simulation and optimization of LNA.The test on the designed amplifier indicates that,in 50-300MHz its gain is above 22dB,flatness below,noise figure less than 1.25 and VSWR less than 1.4. |
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| Keywords: | low noise amplifier(LNA) negative feedback noise figure(NF) broadband |
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