新型氢频标蓝宝石微波腔的仿真设计  

Design and simulation of a sapphire loaded cavity for compact hydrogen maser

作　　者：王暖让[1] 王勇[1] 吴琼[1] 周铁中 高连山[1] 冯克明[1] 杨春涛[1] 

机构地区：[1]计量与校准技术国防科技重点实验室,北京100854 [2]北京无线电计量测试研究所,北京100854

出　　处：《系统工程与电子技术》2008年第6期1186-1190,共5页Systems Engineering and Electronics

摘　　要：针对蓝宝石微波腔的设计问题,通过理论分析推导出计算蓝宝石微波腔参数的公式。利用计算机编程,分析了TE011模式下的谐振频率,以及Q值随腔尺寸、填充介质(蓝宝石)厚度的变化关系并画出曲线,得到了设计优化微波谐振腔的依据。根据得到的依据设计了一种新腔型并利用软件进行优化仿真,新微波腔的无载Q值为67 603,腔外径为160 mm,Q×η为37 857.7,腔频率温度系数为-64.9 kHz/K。与前微波腔相比,具有很大的提高。To describe the design of a sapphire loaded cavity,a formula is induced to calculate the parame ters through theoretical analysis. The frequency and quality factor changed with the size of sapphire and cavity are analyzed under the TE011 mode,and some curves are drawn. Finally a microwave cavity with high Q and small size is obtained through simulation and optimization, which has a better improvement than the former cavity. The parameters of new cavity are as follows. The Q value is 67 603, the outer diameter is 160 mm, Q×η is 37 857.7, temperature frequency coefficient is --64.9 kHz/K.

关 键 词：氢原子频标 小型化 软件仿真 蓝宝石微波腔 品质因数 

分 类 号：TB939[一般工业技术—计量学]