COOLED, ULTRAHIGH-Q, SAPPHIRE DIELECTRIC RESONATORS FOR LOW-NOISE, MICROWAVE SIGNAL GENERATION

被引：12
|
作者：
DRISCOLL, MM
HAYNES, JT
JELEN, RA
WEINERT, RW
GAVALER, JR
TALVACCHIO, J
WAGNER, GR
ZAKI, KA
LIANG, XP
机构：
[1] UNIV MARYLAND,DEPT ELECT ENGN,COLLEGE PK,MD 20742
[2] WESTINGHOUSE ELECT CORP,CTR SCI & TECHNOL,DEPT MICROWAVE ACOUST & MAGNET,PITTSBURGH,PA
来源：
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 1992年 / 39卷 / 03期
关键词：
D O I：
10.1109/58.143174
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Ultrahigh Q, X-band resonators, used in a frequency discriminator for stabilization of a low-noise signal generator, can provide a means of obtaining significant reduction in phase noise levels. Resonator unloaded Qs on the order of 500 K can be obtained in a sapphire dielectric resonator (DR) operating on a low-order (i.e., TE01) mode at 77 K and employing high-temperature superconducting (HTS) films installed in the DR enclosure covers. Rigorous analysis for the determination of resonator frequency, modes, and unloaded Q have been carried out using mode matching techniques. Trade-off studies have been performed to select resonator dimensions for the optimum mode yielding highest unloaded Q and widest spurious mode separation. Field distributions within the resonator have been computed to enable practical excitation of the required mode. The results of both analysis and prototype device evaluation experiments are compared for resonators fabricated using enclosures consisting of conventional, metal sidewalls and covers employing high-temperature superconducting films as a function of cover (i.e., HTS film) conductivity.
引用
收藏
页码：405 / 411
页数：7
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