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Browse Journals & Magazines > Ultrasonics, Ferroelectrics a ...> Volume:57 Issue:1 Help

Thermal control of a dual mode parametric sapphire transducer

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6 Author(s)
Belfi, J. ; Dept. of Phys., Univ. of Pisa, Pisa, Italy ; Beverini, N. ; De Michele, A. ; Gabbriellini, G.
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We propose a method to control the thermal stability of a sapphire dielectric transducer made with 2 dielectric disks separated by a thin gap and resonating in the whispering gallery (WG) modes of the electromagnetic field. The simultaneous measurement of the frequencies of both a WGH mode and a WGE mode allows one to discriminate the frequency shifts due to gap variations from those due to temperature instability. A simple model, valid in quasi-equilibrium conditions, describes the frequency shift of the 2 modes in terms of 4 tuning parameters. A procedure for their direct measurement is presented.

Published in:
Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on  (Volume:57 ,  Issue: 1 )

Date of Publication: Jan. 2010

Page(s):
121 - 125
ISSN :
0885-3010
INSPEC Accession Number:
11024863
Digital Object Identifier :
10.1109/TUFFC.2010.1387
Product Type:
Journals & Magazines
Date of Current Version :
28 December 2009
Issue Date :
Jan. 2010
Sponsored by :
IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society
PubMed ID :
20040435

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