Calculation and Analysis of Characteristic Parameters for Lossy Resonator

Abstract

Resonator is widely employed in microwave and millimeter-wave fields. However, it is challenging and crucial to calculate the electromagnetic field distribution in the resonant cavity with various loss dielectrics. In this paper, according to the axisymmetric distribution characteristics of the lossy resonator, the electromagnetic function of each part in the cavity is established with the Borgnis function, the characteristic equation is obtained based on the mode-matching method, and the resonance frequency and Q factor of the eigenmode TM010 are numerically calculated. With the proposed method, the impact of various dielectric structures and characteristics parameters on the resonant properties of the TM010 mode may be thoroughly examined by taking into account the influence of the thickness as well as the materials of the lossy layer in the z direction. The relative error between the theoretical and the simulated results is below 0.7% at different structures and lossy dielectrics, which indicates that the general calculation approach, as well as crucial data and structure references, is suitable for a related device design in TM010 mode.

Analysis of Intentional Electromagnetic Interference on GENEC Model Using Cylindrical Mode Matching

“…Cui analyzed the resonant cavity filled with various lossy dielectrics using the mode matching method. They calculated the resonance frequency and Q-factor of the cavity considering the thickness and material of the dielectric and compared the results with commercial EM tools [ 12 ]. Lima analyzed electromagnetic waves in a circular waveguide using the mode matching method.…”