FDTD analysis of reverberating chambers

In this contribution we evaluated the behaviour of a reverberating chamber using the FDTD technique. We simulated the rotation of the z-folded stirrer, and we evaluate the statistical properties of the chamber. We considered the finite wall conductivity and we evaluated the absorbed power on the wall extending the FDTD formulation for a 3D geometry and reporting the formulas to be implemented. The formulas of high conductivity walls were tested on a waveguide, in which the analytical results are available. A matched line feeds the antenna exciting the chamber. In this model it is possible to obtain the incident power and the reflected power to the antenna. A second antenna operating as a probe is inserted in the room and also the transmitted power to this antenna is evaluated. We report the FDTD implementation to join the chamber computing domains and the transmission line computing domain. The power balance confirms the reliability of this approach.