一种减小噪声系数测量不确定度的方法

英文篇名：Method to reduce the uncertainty of noise coefficient measurement
中文刊名：国外电子测量技术
英文刊名：Foreign Electronic Measurement Technology
作者：宋青娥
英文作者：Song Qing'e1 ; 2(1.Electronic Test & Measurement Technology National Laboratory ; Qingdao 266555 ; 2.the 41st Institute of China Electronics Technology Group Corporation ; Qingdao 266555)
中文关键词：噪声系数 ; 前置放大器 ; 测量不确定度
英文关键词：noise coefficient ; preamplifier ; measurement uncertainty
出版日期：2008-07-22
机构：电子测试技术国防科技重点实验室;
年：2008
期：07
出版单位：国外电子测量技术

摘要

本文简单介绍了噪声系数的测量原理及影响测量不确定度的各种因素。测试系统本机的噪声系数直接影响着噪声系数测量不确定度,并且随着测试系统噪声系数的增加,测量不确定度也随之增加;详细论述了一种减小噪声系数测量不确定的方法,通过选择适当低噪声前置放大器,可使测试系统的噪声系数对测量不确定的影响降到一个最小程度。最终举例说明了低噪声前置放大器的选择方法,并总结了前置放大器的应用。
In this paper,the measurement theory of noise coefficient and all sorts of uncertainty that affect the noise coefficient measurement are briefly introduced.Measurement system noise coefficient directly affects measurement uncertainty,as the measurement system noise coefficient increases,measurement uncertainty increases.Also,a method to reduce the measurement uncertainty is particularly discussed.The effect of measurement system noise coefficient on measurement uncertainty can be reduced to a minimal level with a proper low noise preamplifier.Finally,how to select a low noise preamplifier is illustrated,the applications of preamplifier are also summarized.

引文

[1]Agilent Technologies.Fundamentals of RFand Micro-wave Noise Figure Measurement.Application Note57-1[Z].2001.
    [2]10Hints for Making Successful Noise Figure Meas-urements.Application Note1341,literature number5980-0288E[Z].
    [3]Agilent Technologies.Noise Figure Measurement Ac-curacy——The Y-Factor Method.Application Note57-2,2001,literature number5932-3706[Z].
    [4]HP8970B Noise Figure Meter Operating Manual[Z].
    [5]袁子龙,李婷婷.反射波振幅谱特征与地震仪前置放大器设计[J].仪器仪表学报,2006,27(2):137-140.
    [6]Agilent Technologies.N8975A Option k40Blockdown Converter.Manufacturing Part Number:N8975-9002[Z].
    [7]Measurement Noise Figure with a Spectrum Analy-zer.Application Note1439[Z].
    [8]丁喜冬,杜贤算,张进修.新型纳米阻抗显微镜前置放大器的设计[J].仪器仪表学报,2007,28(1):57-61.