Simulation of dummy load for L-S band high power microwave calorimeter

The paper reports on the results of numerical simulation of disk-shaped dummy load for L-S band microwave calorimeter in a metal case. We have used the finite element method as a solution tool for Maxwell´s equations in 2D-axisymmetric case in the frequency domain. As a result of the calculations the reflection coefficient of the TM₀₁ electromagnetic wave from the dummy load at normal incidence was obtained. Also we have obtained the coefficient of dielectric losses of electromagnetic radiation in the dummy load´s entrance window made of different materials. Current results confirm and improve the theoretical estimations of the optimal parameters previously obtained in the simplified two-dimensional model.