A wide-band Whispering Gallery Mode dielectric resonator having multiple high-Q cavities for high-field ESR spectroscopy
Applied Magnetic Resonance(1995)
摘要
The behaviour of a disc-shaped dielectric resonator made of sintered alumina and working in the Whispering Gallery Mode (WGM)
has been studied in the frequency interval from about 8 up to about 26 GHz. Many equidistant resonances have been detected
in this frequency interval each of which being characterized by a satisfactoryQ-value due to the very good self-confinement of the microwave field which is typical of WGM propagation. Particular care has
been devoted to the optimization of the coupling between the resonating disc and the microwave source. Examples of ESR spectra
obtained on each of the detected resonances are reported which show the variation of the lineshape with the increase of the
frequency. The obtained results allow one to foresee that the same dielectric disc can be used for ESR spectroscopy also at
frequencies much higher than those up to now exploited.
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关键词
whispering gallery mode
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