Kaintura Jaydeep, Ghadiya Ambrish, Soni Shilpi, Bandi Thejesh N
Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380015, Gujarat, India.
Rev Sci Instrum. 2019 Aug;90(8):084701. doi: 10.1063/1.5098035.
A compact magnetron cavity having integrated optics is designed and realized for a rubidium atomic clock that is being developed for the Indian Regional Navigation Satellite System. This cavity comprises a cylindrical dielectric cell with 25 mm diameter and 25 mm height. The cavity is designed to resonate at the rubidium hyperfine ground-state frequency of 6.8346 GHz with TE-mode. A loop gap resonator structure is employed to obtain the required uniform mode along the quantization-axis in the cavity. The cutoff frequency of the cavity is designed in such a way that the influence of optics on the cavity mode is negligible and it is well within the tuning range of the cavity. The measured results of the realized cavity match up to 90% with the RF simulation results. The overall volume and mass of the realized cavity are about 86 cm and 120 g, respectively, making it suitable for portable space based applications.
为印度区域导航卫星系统正在研制的铷原子钟设计并实现了一种具有集成光学器件的紧凑型磁控管腔。该腔由一个直径25毫米、高25毫米的圆柱形介电单元组成。该腔设计用于在铷超精细基态频率6.8346吉赫兹下以TE模式谐振。采用环形间隙谐振器结构，以在腔内沿量子化轴获得所需的均匀模式。腔的截止频率设计成使得光学器件对腔模式的影响可以忽略不计，并且它完全在腔的调谐范围内。所实现的腔的测量结果与射频模拟结果的匹配度高达90%。所实现的腔的总体积和质量分别约为86立方厘米和120克，使其适用于基于空间的便携式应用。
