| 一种由噪声系数定义推导出的噪声系数测量方法 |
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| 引用本文： | 郝国欣,周旋,张承志,任天亮.一种由噪声系数定义推导出的噪声系数测量方法[J].电子工程师,2008,34(11):8-9. |
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| 作者姓名： | 郝国欣 周旋 张承志 任天亮 |
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| 作者单位： | 1. 中国电子科技集团公司第22研究所,山东省,青岛市,266107
2. 总装工程兵科研一所,江苏省,无锡市,214035 |
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| 摘 要： | 对于高精度的电子设备，噪声是影响其性能的关键因素。为了方便测得某一待测放大器或接收机的噪声系数，通过介绍噪声对电子设备性能的影响以及噪声系数的定义及其数学公式推导，总结了一种利用频谱分析仪测量放大器噪声系数的方法。该方法虽然存在一定的局限性，但对于高增益的待测器件，仍不失为一种简单有效的测量方法。
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| 关 键 词： | 噪声 噪声系数 带宽 功率谱密度 |
Measurement of Noise Factor According to Its Definition |
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| HAO Guoxin,ZHOU Xuan,ZHANG Chengzhi,REN Tianliang.Measurement of Noise Factor According to Its Definition[J].Electronic Engineer,2008,34(11):8-9. |
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| Authors: | HAO Guoxin ZHOU Xuan ZHANG Chengzhi REN Tianliang |
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| Institution: | HAO Guoxin, ZHOU Xuan, ZHANG Chengzhi, REN Tianliang(1. The 22th Research Institute of CETC, Qingdao 266107, China; 2. The First Engineer Research Institute of the General Armaments Department, Wuxi 214035, China) |
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| Abstract: | Noise is the main factor affecting the performance of high precision electronic equipment. To measure the noise factor of an amplifier or receiver expediently, a noise factor measurement method using spectrum analyzer is proposed based on the definitions and formulas given in the paper. The effect of noise on the electronic equipments performance and the definition of the noise factor are introduced in this paper. Via experiment validation, though the measurement method has some limitations, it still is a simple and effective method. |
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| Keywords: | noise noise factor bandwidth power spectrum density |
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