A novel compact rubidium frequency standard with a low sensitivity to magnetic and vibrational disturbances

A rubidium frequency standard with a compact and ruggedized design is developed. Two improvements are incorporated into the traditional design: an electronic method which improves the frequency stability under vibration and accelerations, and an electronic method to eliminate the sensitivity to magnetic fields. These schemes are incorporated into present rubidium frequency standard. This unit has a very high modularity using partially hybridized circuits. It has a good short-term stability between 1 and 500 s. The OCXO incorporates a low-g-sensitivity SC-cut quartz crystal