Time-Dependent Model of RF Energy Propagation in Coupled Reverberant Cavities

A simple time-dependent model for the analysis of RF energy propagation in coupled reverberant cavities is presented. The cumulative buildup and full exchange of radiated electromagnetic energy between coupled spaces are important issues for electronic systems compatibility in reverberant environments such as below-deck compartments in ships and aircraft cabins and bays. Based on conservation of average energy, the general model formulation is valid for both weak and strong couplings between the cavities caused by window materials, open apertures, closed and open hatches, seams, and cable/pipe penetrations through bulkheads. Application of the model is demonstrated using time-resolved received power measurements conducted in nested reverberation chambers.