电子学报 ›› 2016, Vol. 44 ›› Issue (10): 2556-2560.DOI: 10.3969/j.issn.0372-2112.2016.10.039

• 科研通信 • 上一篇    

基于相关测量MUSER馈源轴比的方法研究

苏仓1,2,3, 王威1,3, 颜毅华1,3   

  1. 1. 中国科学院国家天文台, 北京 100012;
    2. 中国科学院研究生院, 北京 100049;
    3. 中国科学院太阳活动重点实验室, 北京 100012
  • 收稿日期:2015-04-08 修回日期:2015-11-16 出版日期:2016-10-25 发布日期:2016-10-25
  • 作者简介:苏仓,男,1987年二月出生于山东省菏泽市.2009年毕业于桂林电子科技大学,2010年进入中科院国家天文台太阳射电研究团组.现为博士生,从事太阳射电图像处理及校准方面的研究.E-mail:csu@nao.cas.cn;王威,男,1979年9月出生,辽宁铁岭人.高级工程师,硕士生导师,中国电子学会会员,天线分会委员.2002年,2007年分别在杭州电子工业学院和中国科学院研究所院获得工学学士、理学博士学位.现为中国科学院国家天文台高级工程师,主要从事射电天文方法、校准与数据处理等方面的研究.
  • 基金资助:

    国家重大科研装备研制项目(No.ZDYZ2009-3);国家自然科学基金(No.11221063,No.Y011141001);天文联合基金重点项目(No.U1231205);青年基金(No.11203042)

Research of Measuring Axis Ratio of MUSER's Feed Based on Correlation

SU Cang1,2,3, WANG Wei1,3, YAN Yi-hua1,3   

  1. 1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
  • Received:2015-04-08 Revised:2015-11-16 Online:2016-10-25 Published:2016-10-25

摘要:

明安图射电频谱日像仪是新一代太阳专用射电成像望远镜,超宽带双圆极化接收馈源是其关键技术之一.轴比是反映双圆极化馈源性能的重要指标,单天线测量轴比的传统方法需要标准天线辅助,本文采用基于相关测量干涉阵馈源轴比的方法,针对MUSER天线数目多,且为户外环境,根据天文观测的需求须经常测试天线的性能的特点,简化了干涉阵望远镜测量轴比的过程,且能够高效的得到准确的测量结果.文中对该方法的测量过程做了详细的说明,给出了部分天线的测试结果,结果同时反映了馈源的良好特性.

关键词: 综合孔径, 明安图射电频谱日像仪, 圆极化, 轴比

Abstract:

The MUSER(Mingantu SpEctral Radioheliograph) is a new generation of solar dedicated radio telescope.Its ultra-wide band dual-circular polarized feed is one of the key technologies.AR (Axis Ratio) is an important parameter for measuring feed efficiency.The traditional AR measurement needs the involvement of the standard antenna.In this paper,the method by measuring correlation is adopted to measure AR of feeds for MUSER.Since MUSER has numbers of antennas and located in harsh environments,according to the demand of astronomical observations,the performance of the antennas should be measured frequently.This method simplifies the process of AR measurement of the interferometric array and can obtain accurate results efficiently.The measuring process are presented in detail in this paper.In addition,the results of AR measurement show the favourable characteristics of the feeds for MUSER.

Key words: synthetic aperture, Mingantu spectral radioheliograph, circular polarization, axis ratio

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