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| 大口径射电望远镜台址电磁干扰预测方法 | |
| Alternative Title | A prediction method for electromagnetic interference of large aperture radio telescope |
刘晔1 ; 刘奇1,2
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| 2019-09-01 | |
| Source Publication | 中国科学:物理学 力学 天文学
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| ISSN | 1674-7275 |
| Volume | 49Issue:9Pages:099514 |
| Contribution Rank | 1 |
| Abstract | 新疆奇台拟建的110 m全向可动射电望远镜(Qi Tai Radio Telescope, QTT)具有极高的信号捕捉能力,任何微弱的信号都会影响其高效运行,为了缓解QTT台址无线电宁静区的电磁干扰,本文提出了一种电磁干扰预测方法.首先,基于QTT台址无线电宁静区地形数据和地形特征,分析了现有电波传播模型的适用性,选取LongleyRice模型和Two-Ray模型作为QTT的电波传播模型算法,通过电波传播仿真分析,得到潜在干扰点到达射电望远镜馈源口面的路径损耗;其次,结合QTT馈源口面干扰电平阈值和天线旁瓣增益,计算得到潜在干扰点所在位置的干扰电平阈值;最后,运用该方法分析了QTT限制区内村庄典型电子设备和35 kV高压输电线路对QTT的影响. |
| Other Abstract | The ongoing Qi Tai Radio Telescope (QTT) which is a steerable 110-m aperture radio telescope has a very high sensitivity of signal detection, thus any weak noise will affect its efficient operation. We proposed a prediction method to lower the electromagnetic interference in the radio quiet zone of QTT site. Firstly, based on the topographic data and topographic features of radio quiet zone of the QTT site, we analyzed the applicability of the existing radio wave propagation model and chosen Longley-Rice and Two-Ray model as the algorithm of the radio wave propagation model of the QTT. By the simulation analysis of radio wave propagation, we got the path loss of the potential interference point when they reached the QTT feed aperture. Secondly, the interference level limits at the position of potential interference point were calculated by combining the QTT feed aperture interference level limits and antenna side lobe gains, and its influence on the radio telescope was predicted and analyzed by combining with the field environment. Finally, the typical village electronic equipment and 35 kV power supply engineering in the QTT restricted area were analyzed by using this method, and the solutions were also proposed correspondingly. |
| Correspondent Email | liuqi@xao.ac.cn |
| Keyword | 电磁干扰预测 无线电宁静区 电波传播模型 干扰电平阈值 |
| DOI | 10.1360/SSPMA-2019-0016 |
| Indexed By | CSCD ; 中文核心期刊要目总览 |
| Language | 中文 |
| CSCD ID | CSCD:6580087 |
| Citation statistics |
Cited Times:4[CSCD]
[CSCD Record]
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| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3340 |
| 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）_110米大口径全可动射电望远镜关键技术研究（973项目）_课题3：超宽带接收机与高速数字终端 110米口径全可动射电望远镜（QTT）_技术成果_“大型全可动射电望远镜关键技术研究”专辑（中国科学:物理学 力学 天文学 Volume 49, Issue 9, 2019） |
| Corresponding Author | 刘奇 |
| Affiliation | 1.中国科学院新疆天文台, 乌鲁木齐830011; 2.中国科学院大学, 北京100049 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 刘晔,刘奇. 大口径射电望远镜台址电磁干扰预测方法[J]. 中国科学:物理学 力学 天文学,2019,49(9):099514. |
| APA | 刘晔,&刘奇.(2019).大口径射电望远镜台址电磁干扰预测方法.中国科学:物理学 力学 天文学,49(9),099514. |
| MLA | 刘晔,et al."大口径射电望远镜台址电磁干扰预测方法".中国科学:物理学 力学 天文学 49.9(2019):099514. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 刘晔-大口径射电望远镜台址电磁干扰预测方（2286KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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