一种新型的小型化铷原子频标

A New Type of Miniaturized Rubidium Frequency Standard

介绍一种用螺旋线慢波结构代替微波谐振腔的小型化铷原子频标,它具有体积小、易调节等优点,性能与大型铷原子频标一样。

In this paper, a new type of miniaturized ^(87)Rb frequency standard is reported. In a optical-microwave unit, a two cell type is used instead of the traditional three cell type. The mixed Rubidium cell has both filter and absorption function. A helix slow wave structure is applied to replace the traditional microwave cavity, in which the mixed Rubidium cell is placed. It greatly reduces the volume of optical-microwave unit and makes the adjustment easy. The volume of optical-microwave unit is 360 cm^3. The volume of electronics is 720cm^3. The specifications are as follows: short-term stability≤3×10^(-11)/s; long-term stability≤3×10^(11)/month; environment temperature coefficient≤5×10^(-12)/℃; effet of earfh magnetic field≤2×10^(-11).