Study on cascade noise figure of receivers with down converter
According to the definition of noise figure,this paper deduces the cascade noise figure formula of receivers with mixers. By using this formula,it is easy to calculate and analysis the system noise figure affected by the device noise figure, gain and filter image rejection. The position of image rej...
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National Computer System Engineering Research Institute of China
2021-01-01
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doaj-ff25180468924cccb4d0defc39eee3852021-05-21T05:33:53ZzhoNational Computer System Engineering Research Institute of ChinaDianzi Jishu Yingyong0258-79982021-01-0147171010.16157/j.issn.0258-7998.2010683000127715Study on cascade noise figure of receivers with down converterZhang Guangxian0The 13th Research Institute,CETC,Shijiazhuang 050051,ChinaAccording to the definition of noise figure,this paper deduces the cascade noise figure formula of receivers with mixers. By using this formula,it is easy to calculate and analysis the system noise figure affected by the device noise figure, gain and filter image rejection. The position of image rejection filter behind the low noise amplifier needs place as close as to the mixer. The gain before the filter and filter image rejection needs high enough, at least greater than 20 dB. Through the proper design and image rejection, the noise figure of the receiver which has two-stages, three-stages frequency conversion will decrease close to 6 dB and 9 dB, than when the image noise do not be rejected at all.http://www.chinaaet.com/article/3000127715receivercascadenoise figuremixerimage rejection |
collection |
DOAJ |
language |
zho |
format |
Article |
sources |
DOAJ |
author |
Zhang Guangxian |
spellingShingle |
Zhang Guangxian Study on cascade noise figure of receivers with down converter Dianzi Jishu Yingyong receiver cascade noise figure mixer image rejection |
author_facet |
Zhang Guangxian |
author_sort |
Zhang Guangxian |
title |
Study on cascade noise figure of receivers with down converter |
title_short |
Study on cascade noise figure of receivers with down converter |
title_full |
Study on cascade noise figure of receivers with down converter |
title_fullStr |
Study on cascade noise figure of receivers with down converter |
title_full_unstemmed |
Study on cascade noise figure of receivers with down converter |
title_sort |
study on cascade noise figure of receivers with down converter |
publisher |
National Computer System Engineering Research Institute of China |
series |
Dianzi Jishu Yingyong |
issn |
0258-7998 |
publishDate |
2021-01-01 |
description |
According to the definition of noise figure,this paper deduces the cascade noise figure formula of receivers with mixers. By using this formula,it is easy to calculate and analysis the system noise figure affected by the device noise figure, gain and filter image rejection. The position of image rejection filter behind the low noise amplifier needs place as close as to the mixer. The gain before the filter and filter image rejection needs high enough, at least greater than 20 dB. Through the proper design and image rejection, the noise figure of the receiver which has two-stages, three-stages frequency conversion will decrease close to 6 dB and 9 dB, than when the image noise do not be rejected at all. |
topic |
receiver cascade noise figure mixer image rejection |
url |
http://www.chinaaet.com/article/3000127715 |
work_keys_str_mv |
AT zhangguangxian studyoncascadenoisefigureofreceiverswithdownconverter |
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1721432479097683968 |