Title :
Frequency and low-temperature characteristics of high-Q dielectric resonators
Author :
Kobayashi, Y. ; Kabe, Y. ; Kogami, Y. ; Yamagishi, T.
Author_Institution :
Dept. of Electr. Eng., Saitama Univ., Urawa, Japan
Abstract :
Accurate calculations of unloaded Q for the TE/sub 01 delta /, TM/sub 01 delta /, EH/sub 11 delta /, and HE/sub 11 delta / modes in a dielectric rod resonator placed in a conductor cavity are described. The calculated results are verified experimentally. The mode designation is investigated from the viewpoint of field distribution. In particular, for high-Q TE/sub 01 delta /-mode dielectric resonators, the frequency and temperature characteristics are discussed. A typical result measured at 4 GHz shows unloaded Q values of 45000 at 20 degrees C and 140000 at -180 degrees C with a temperature coefficient of frequency of 1.5 p.p.m./ degrees C.<>
Keywords :
Q-factor; dielectric resonators; -180 degC; 20 degC; 4 GHz; EH/sub 11 delta /; HE/sub 11 delta /; TE/sub 01 delta /; TM/sub 01 delta /; conductor cavity; high-Q dielectric resonators; low-temperature characteristics; mode designation; temperature coefficient of frequency; unloaded Q; Conductors; Dielectric losses; Dielectric measurements; Erbium; Frequency measurement; Magnetic resonance; Permittivity; Q measurement; Resonant frequency; Temperature;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38950
