High-Q whispering gallery modes in a spherical shell dielectric resonator: Characterization at microwave frequencies
Institute for Chemical-Physical Processes, CNR, Via G. Moruzzi 1, 56124 Pisa, Italy
2 IRCOM (U.A. CNRS 356) , U.F.R. des Sciences, Université de Limoges, 87060 Limoges Cedex, France
Corresponding author: a email@example.com
Published online: 4 February 2003
We present a numerical and experimental characterization of high-Q whispering gallery resonant modes excited in a fused quartz spherical shell operated in the 18–26.5 GHz band; easy coupling and selection of modes is a most advantageous feature of the proposed structure with respect to ordinary bulk resonators. The numerical results, based on a finite element algorithm, well match experimental data, which also show the capability of our device to perform gaseous spectroscopy measurements.
PACS: 41.20.Jb – Electromagnetic wave propagation; radiowave propagation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003