综合孔径射电望远镜中锁幅环的增益抖动
VARIATION OF GAIN OF THE GAIN-LOCK LOOP IN A SYNTHETIC RADIO TELESCOPE
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摘要: 本文介绍了一种综合孔径射电望远镜上的增益控制环路,并详细讨论了噪声对增益起伏的影响。文章介绍了锁幅环的基本性质,推导了噪声功率与增益均方抖动之间的关系式。推导了环路失锁门限,并画出了实验验证的结果。最后讨论了减少噪声影响的一些措施。
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Abstract: In this paper, a gain control loop which operates in synthetic radio telescope is described. The influence of noise on the variation of the gain is discussed in some details ; the gain-lock loop is described; the relation between noise power and variation of gain is derived; the formula for determining the threshold of unlocking is given and the experimental results are displayed in Fig. 6 and Fig. 7. In this paper, the steps taken to decrease the influence of noise are also discussed. -
郑继禹、万心平、张厥盛,锁相环路原理与应用,人民邮电出版社,1976,第144页.[2]刘以嵩,北京天文台台刊,1977,第9期,第60页.[3]陆道政、季新宝,自动控制原理及设计,上海科学技术出版社,1978. -
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