Research on frequency-temperature compensated sapphire-SrTiO_3 loaded cavity for hydrogen maser

作     者：Wang Nuanrang Zhou Tiezhong Gao Lianshan Yang Chuntao Feng Keming 

作者机构：National Key Lab. of Metrology and Calibration Technology Beijing 100854 P. R. China Beijing Inst. of Radio Metrology & Measurement Beijing 100854 P. R. China 

出 版 物：《Journal of Systems Engineering and Electronics》 (系统工程与电子技术（英文版）)

年 卷 期：2009年第20卷第4期

页      面：711-717页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：atomic hydrogen maser frequency-temperature compensation sapphire loaded cavity temperature coefficient. 

摘      要：To obtain frequency-temperature compensation in a sapphire loaded cavity for hydrogen maser, a dielectric named SrTiO3 is employed whose temperature coefficient of permittivity is opposite to that of sapphire. Based on theoretical analysis and computer simulation, a TE011 mode of a sapphire loaded cavity associated with two small rings of SrTiO3 with different thickness is solved, and the useful parameters that influence the temperature coefficient of cavity are calculated. Finally an experiment is brought forward and its results are very close to the computing results. When the thickness of SiTiO3 dielectric is 7 mm and the diameter is 17 mm in configuration b, the temperature coefficient of cavity is decreased from -58.8 kHz/K to -8.2 kHz/K and the quality factor is 40248.