摘要
针对蓝宝石氢原子频标的小型化问题,通过理论分析推导出微波腔参数的求解方程;通过计算机仿真分析,提出了设计小型微波腔的方法。该方法利用腔频率、Q值随腔尺寸及填充蓝宝石尺寸的变化关系,在保证温度系数的前提下,获得一种高Q值、小尺寸宝石的小型化腔,并利用仿真软件进行验证及优化,最后通过实验测得了该微波腔的参数,与仿真计算结果基本一致。实验得到该腔的Q值为68000,温度系数为-59.7kHz/℃,圆柱腔的外径为153mm,高度为172mm,与传统微波腔的参数(其中Q值50000,温度系数-62kHz/℃,腔外径176mm)相比有较大进步。
To describe the miniaturization of a sapphire loaded cavity in hydrogen maser, a formula is induced to calculate the parameters through theoretical analysis, and a method is brought forward to design the compact microwave cavity through computer simulations. A cavity with high Q and small size sapphire is achieved through analyzing the relationship between parameters and sizes of cavity. The cavity is validated and optimized by simulation software. Finally an experiment is done to test parameters of the designed cavity, and the experiment results are very close to the computing and simulating results. The parameters and sizes of new cavity are as follows： the Q value is 68 000; Temperature frequency coefficient is -59.7kHz/℃. The outer diameter is 153mm ;The height is 172ram. It improves a lot comparing the usual cavity whose parameters are as follows： Q value is 50000; Temperature frequency coefficient is -62kHz/℃ ; The outer diameter is 176ram.
出处
《微波学报》
CSCD
北大核心
2009年第4期82-86,共5页
Journal of Microwaves
关键词
氢原子频标
小型化
蓝宝石微波腔
品质因数
Hydrogen frequency standard, Miniaturization, Sapphire loaded cavity, Quality factor
