中文摘要：

改善目前广泛应用的铷钟的频率温度特性是一重要的研究内容.通过对铷钟频率锁定原理和其频率温度特性的研究,设计了一种基于变频补偿来改善其频率温度特性的方法.对其原理、电路实现、信号处理、变频过程的优化控制、实验结果等问题做了重点研究.结果是在不恶化原子钟其他性能指标的条件下将实验用商用铷钟的频率温度特性显著地提高.提出的方法与优化原子钟物理部分设计或增加整钟控温电路稳定度等传统方法相比较具有容易实现、更高的稳定度、容易调试等优点.

英文摘要：

Improving the frequency-temperature characteristic of widely used rubidium clocks is an important topic of research. Through studying the frequency locking principle and frequency-temperature characteristic of rubidium clock, we put forward a method for improving its frequency-temperature characteristic based on frequency compensa- tion technique;the operation principle, circuit implementation, signal processing method and optimal control method for the frequency conversion process are studied emphatically. The experiment on a commercial rubidium clock was conducted, and the experiment result was also studied. The experiment result shows that with the proposed approach, the frequency-temperature characteristic of the commercial rubidium clock is improved dramatically without deteriora- ting the other clock performance indexes. Compared with the traditional methods that optimize the atomic clock physi- cal design or enhance the stability of the clock temperature control circuit, the proposed method has the advantages, such as easy realization, high stability, high precision, easy to adjust, and etc.