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Alternative TitleMeasurement and Analysis of Noise Temperature for Ku-band Receiver
王凯1,2; 陈卯蒸1,2; 李笑飞1,2; 李健1,2; 项斌斌1,2; 闫浩1,2; 王洋1,2
Source Publication电子机械工程
Contribution Rank1
Other AbstractThe microwave receiver is special equipment of the radio telescope to receive radio signals and its noise temperature is an important parameter to test the sensitivity. The classic measurement method for noise temperature of receiver, namely the cold and hot load method, can't be carried out at any time during the observation and is subject to the size of the receiver, while the chopper wheel method uses radiation from the sky to replace the cold load which is difficult to realize and only normal temperature blackbody is enough in test. A simple Ku-band receiver under room temperature is set up and its noise temperature is measured by these two methods in this paper. Two kinds of blackbody under room temperature are selected and the temperature difference between cold and hot load is shortened to test the uncertainty of the cold and hot load method. Then the results of noise temperature measured by cold and hot load method are compared with that measured by chopper wheel method. The comparison result confirms that the chopper wheel method can satisfy the normal noise temperature measurement requirements of the Ku-band receiver in fine weather conditions at night.
Keyword微波接收机 Y因子 斩波轮 噪声温度 误差
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Document Type期刊论文
Affiliation1.中国科学院新疆天文台, 新疆乌鲁木齐830011;
2.中国科学院射电天文重点实验室, 江苏南京210008
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
王凯,陈卯蒸,李笑飞,等. Ku波段接收机噪声温度测试及分析[J]. 电子机械工程,2018,34(6):13-16+21.
APA 王凯.,陈卯蒸.,李笑飞.,李健.,项斌斌.,...&王洋.(2018).Ku波段接收机噪声温度测试及分析.电子机械工程,34(6),13-16+21.
MLA 王凯,et al."Ku波段接收机噪声温度测试及分析".电子机械工程 34.6(2018):13-16+21.
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