Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1476711 | Journal of the European Ceramic Society | 2007 | 4 Pages |
Abstract
Exciting traveling waves in high-Q resonant structures can simplify low noise oscillator designs and also has applications for newly proposed Lorentz invariance tests. In this work we use microstrip probes to excite traveling waves in a sapphire dielectric resonator. Previous work has indicated that matching microstrip probes to a sapphire resonator can be a difficult requirement. A model has been developed, which takes into account leakage of the microstrip line in the reverse direction to which we excite the traveling wave. From such a model we can define the standing wave ratio (SWR). By comparing the model with experiment we find that we can excite a traveling wave with an SWR of 0.35 and an unloaded Q-factor of 1.5Ã105 in a WGH12,0,2 mode at 9.997âGHz, in a sapphire cylinder of 5âcm diameter and 3âcm height. From the model, we also propose new oscillator designs for low noise applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A.C. Fowler, M.E. Tobar, C.R. Locke, E.N. Ivanov, J.G. Hartnett, J.D. Anstie, D. Cros,