Sydoruk Y. Radio frequency electrical and microwave electromagnetic devices for dielectric bulk materials exposure

In the thesis the designing principles of the devices for exposure of dielectric bulk materials, including grain, with microwave electromagnetic and RF electric field in order to provide a uniform irradiation of the materials and high energy efficiency of the processing chamber (the active core) in which the exposure occurs. A detailed analysis of RF processing chamber is carried out. For microwave band three variants of the device in which the above requirements are provided by multiple passing of electromagnetic waves through a layer of the material are offered. In order to ensure a homogeneous exposure at RF band the multi-electrode chamber, on a cylindrical surface of which n electrodes fed with harmonic voltage are placed, are proposed. The detailed analysis of strength and potential of the electric field in the open complex ring-shaped multiply connected boundary area is performed using the complex variable theory and the theory of singular integral equations. The analysis of the electric field is performed by presenting it as a sum of spatial harmonics. It is shown that the proposed approach simplifies the analysis for assessing of the field homogeneity area. The designing principle and calculating approach for multiphase generator feeding the multi-electrode structure and multichannel phase-shifter are proposed.