Natural electromagnetic modes in cylindrical waveguide junction and their use for nondestructive microwave measurements of materials electromagnetic characteristics

Modern methods of measurement allow to determine with a high degree of exactness dielectrics electric parameters. However, the overwhelming majority of existing measuring instruments made on the basis of those methods are actually destructive measuring means, allowing to measure only integral characteristics of materials. Modern technological process demands a basically new approach to these problems: manufacturing new high Q and highly expensive materials (leucosapphires, artificial rubins, a number of ferrite maros, etc.) and also goods on their basis (stripline bases and microwave integral schemes, dielectrical waveguides and resonators, etc) supposes materials characteristics measurements without ruining them. From this point of view nondestructive methods of measurement possess obvious advantages. Nevertheless, the existing non-destructive measuring means mostly have a not very high exactness of measurement of dielectric permittivity, magnetic permeability and material losses and also have low sensitivity to their changes. On the basis of our analysis, an automated complex, allowing to measure samples meability with high degree of exactness, effectively and without destructing them, has been constructed.