中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 新疆天文台
  3. 研究单元未命名
  4. 射电天文技术研究室
  5. 微波接收机技术实验室
Research on Beam Calibration Technology of Phased Array Feed

文献类型：期刊论文

作者Wang, Kai1,2; Cao, Liang1,2; Yan, Hao1,2,3; Duan, Xue-Feng1,2; Ma, Jun1,2; Chen, Mao-Zheng1,2; Li, Jia-Hui1,2
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2025-08-01
卷号25期号:8页码:085005
关键词telescopes instrumentation: detectors techniques: radial velocities
ISSN号1674-4527
DOI10.1088/1674-4527/addeb3
产权排序1
英文摘要The most significant distinction between Phased Array Feed (PAF) and traditional multi-beam receivers lies in its beamforming capability, where the purpose of beam calibration is to accurately determine the weighting information for each beam within the field of view. This paper first introduces the beamforming principles and algorithm classifications of PAF. Drawing on the successfully implemented PAF beam calibration schemes of Australian Square Kilometer Array Pathfinder and Aperture Tile in Focus in radio astronomy observations, we present a detailed explanation of the principles and procedures for beam calibration based on the Maximum Signal-to-Noise Ratio (Max-SNR) and Linear Constrained Minimum Variance (LCMV) algorithm. Based on the existing 1.25 GHz microstrip antenna PAF array, we designed a calibration grid comprising seven distinct directional beams and established an experimental platform for PAF array beam calibration based on an analog beamformer with the Max-SNR algorithm. Test results demonstrated a maximum gain fluctuation of 3.2 dB among the seven beams, and we further refined the weighting coefficients for each beam by selecting an appropriate gain target value and introducing a scaling factor, thereby reducing the maximum gain fluctuation between the seven beams to 1.5 dB. Building upon the Max-SNR measurements of the central axial beam's intersection points with adjacent beam patterns and their gain differentials, we implemented a recalibration of the central beam using the LCMV algorithm. This approach enforced gain consistency across predetermined directions, with test results demonstrating a reduction in the central beam's gain fluctuation from 1.6 to 0.9 dB. This research systematically validates the array-level beamforming algorithm and beam calibration scheme, offering significant guidance for future PAF receivers in areas such as beam calibration scheme selection and performance correction. Furthermore, it establishes a solid foundation for the development of advanced digital beamforming technologies with enhanced data processing ability and weighting accuracy.
资助项目National Key R&D Program of China[2022YFC2205303] ; Xinjiang Uygur Autonomous Region Tianshan Talent Training Plan[2024TSYCCX0072] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01A358] ; National Natural Science Foundation of China[11973078] ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001518965800001
出版者IOP Publishing Ltd
资助机构National Key R&D Program of China ; Xinjiang Uygur Autonomous Region Tianshan Talent Training Plan ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; National Natural Science Foundation of China ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China
源URL[http://ir.xao.ac.cn/handle/45760611-7/7879]  
专题微波接收机技术实验室
通讯作者Wang, Kai; Yan, Hao
作者单位1.Xinjiang Key Lab Microwave Technol, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Kai,Cao, Liang,Yan, Hao,et al. Research on Beam Calibration Technology of Phased Array Feed[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2025,25(8):085005.
APA Wang, Kai.,Cao, Liang.,Yan, Hao.,Duan, Xue-Feng.,Ma, Jun.,...&Li, Jia-Hui.(2025).Research on Beam Calibration Technology of Phased Array Feed.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,25(8),085005.
MLA Wang, Kai,et al."Research on Beam Calibration Technology of Phased Array Feed".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 25.8(2025):085005.

入库方式： OAI收割

来源：新疆天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。