中国天文学会学术期刊


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应用ATA的对数周期馈源方案于FAST的可能性探讨

吴盛殷1，熊继衮2，吕善伟3，张江林3，徐祥1，南仁东1，金乘进1
 (1. 中国科学院 国家天文台，北京 100012；2. 航天总公司 第23所，北京 100854；
3. 北京航空航天大学 电子工程系；北京 100083)

摘    要

   介绍应用于美国凤凰计划的Allen望远镜阵（ATA）的对数周期馈源（LPA）概况，初步给出此种馈源的基本参数及性能，仿真估算了其驻波比和方向图，并结合正在进行中的我国500 m孔径球面射电望远镜（FAST）计划，探讨了应用这种宽带馈源的可能性及其限制。

      

　

On Possibilities of Applying the LPA Scheme for the ATA to the FAST

  WU Sheng-yin 1, XIONG Ji-gun 2, LU Shan-wei 3, ZHANG Jiang-lin 3, 
XU Xiang 1, NAN Ren-dong 1, JIN Cheng-jin 1
 (1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; 
2. The 23rd Institute, General Corporation of Aeronautics and Astronautics of China,Beijing 100854, 
China; 3. Beijing University of Aeronautics and Astronautics, Beijing 100083, China)

　Abstract

             Allen Telescope Array (ATA) is a radio telescope array applied in the project Phoenix, US. The array will be operated from 0.5 to 11 GHz. A wide-band feed and an integrated MMIC front end will be equipped on each of 350 antennas in diameter of 6.1 m. A general introduction of the array and an initial analysis of performance and parameters of associated LPA feeds are presented in the paper. Preliminary simulation of the feed has been performed and indicated. The possibility of applying this kind of feed in the FAST project is discussed briefly at the end of the paper.
    


       
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