Abstract
The measurement of inner sizes of VHF cavity resonators and simple shapes cavities with conducting walls by using resonant frequency spectrum of its electromagnetic oscillations is considered. The differences between eigenfrequencies and resonant frequencies for resonator with perfect conducting walls and real resonator with impedance walls have been specified. The type of function for resonant amplitude-frequency characteristic of real resonators is discussing. The measurement results of inner diameter and length of cavity resonators from primary national standard GET 110-2012 are presented.
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