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| K波段常温接收机噪声注入定标方法分析研究 | |
| Alternative Title | Analysis and Research on Noise Injection Calibration Method of K-band Ambient Temperature Receiver |
王凯1,2,3 ; 闫浩1,2,3; 段雪峰1,3; 马军1,2,3; 陈卯蒸1,2,3; 王洋1,2,3; 曹亮1,2,3; 陈晨雨1,2; 李鹏1,2
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| 2020-10-01 | |
| Source Publication | 天文研究与技术
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| ISSN | 1672-7673 |
| Volume | 17Issue:4Pages:439-445 |
| Contribution Rank | 1 |
| Abstract | 噪声注入定标方法作为厘米波段一种常规强度校准方式而被广泛使用。通过组建K波段常温接收机及其定标平台，在室内20℃下使用传统冷热负载法标定接收机噪声温度及噪声源温度，之后在室外-7℃中使用同样方法再次标定上述参数，并利用室内标定的噪声源去进一步标定室外环境中接收机的噪声温度。测试结果表明，在环境温度变化约27℃时，接收机噪声温度定标差异约为50.5%，标准噪声源定标差异约为41%。故此得知，如若将噪声注入法应用于常温接收机定标中，首先需考虑对接收机进行恒温处理，另外可采取对注入的标准噪声源进行温度补偿，使其可以更加精确的应用于二次定标当中，这也是本论文下一步计划开展的工作。 |
| Other Abstract | Noise injection calibration method is widely used as a conventional amplitude calibration method in centimeter band receiver. Through the establishment of K-band ambient temperature receiver and its amplitude calibration platform,the traditional cold and hot load method is used to calibrate the receiver noise temperature and noise source temperature at indoor temperature of 20 ℃,and then the same method is used to calibrate the receiver noise temperature and noise source temperature at outdoor temperature of -7 ℃,and the indoor calibrated temperature noise source is used to further calibrate the receiver noise temperature in outdoor environment. The test results show that when the ambient temperature changes by about 27 degrees,the difference of receiver noise temperature calibration is about 50.5%,and the difference of standard noise source calibration is about 41%. Therefore,if the noise injection method is applied to the calibration of ambient temperature receiver,the receiver should be treated with constant temperature first,and the injected standard noise source can be compensated with temperature to make it more accurately applied to the secondary calibration,which is the next work of this paper. |
| Keyword | 定标 接收机 噪声温度 冷热负载法 噪声注入 |
| DOI | 10.14005/j.cnki.issn1672-7673.20200513.002 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:6827690 |
| Citation statistics |
Cited Times:2[CSCD]
[CSCD Record]
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| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4022 |
| Collection | 射电天文研究室_微波技术实验室 110米口径全可动射电望远镜（QTT）_技术成果 |
| Affiliation | 1.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; 3.新疆微波技术重点实验室，新疆乌鲁木齐830011 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 王凯,闫浩,段雪峰,等. K波段常温接收机噪声注入定标方法分析研究[J]. 天文研究与技术,2020,17(4):439-445. |
| APA | 王凯.,闫浩.,段雪峰.,马军.,陈卯蒸.,...&李鹏.(2020).K波段常温接收机噪声注入定标方法分析研究.天文研究与技术,17(4),439-445. |
| MLA | 王凯,et al."K波段常温接收机噪声注入定标方法分析研究".天文研究与技术 17.4(2020):439-445. |
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| 王凯-2020-K波段常温接收机噪声注入（1149KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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