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Analysis of the rutile-ring method of frequency-temperature compensating a high-Q whispering gallery sapphire resonator

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7 Author(s)
Tobar, M.E. ; Dept. of Phys., Western Australia Univ., Nedlands, WA, Australia ; Hartnett, J.G. ; Duchiron, G. ; Cros, D.
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The rutile-ring method of dielectrically frequency-temperature compensating a high-Q whispering gallery (WG) sapphire resonator is presented. Two and three-dimensional finite element (FE) analysis has been implemented to design and analyze the performance of such resonators, with excellent agreement between theory and experiment. A high-Q factor of 30 million at 13 GHz, and compensation temperature of 56 K was obtained. It is shown the frequency-temperature compensation can occur either because the rutile adds a small perturbation to the sapphire resonator or because of a mode interaction with a resonant mode in the rutile. The characteristics of both of these methods are described, and it is shown that for high frequency stability, it is best to compensate perturbatively.

Published in:

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:48 ,  Issue: 3 )

Date of Publication:

May 2001

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