Shielding effectiveness estimation in an electrically large cavity using power balance method and BLT Equation

In this article, the PWB(Power Balance) method and BLT(Baum-Liu-Tesche) Equation are combined to analyze the small PCB structure inside an electrically large cavity. Practically, the electrically large cavity has a disadvantage in evaluating the field inside the cavity precisely because of multiple reflection and resonance phenomena. In addition, it needs much time-consumption to carry out the field analysis within a sufficient accuracy. In order to overcome this problem, PWB method based on statistical theory and BLT equation applying topological modelling method are introduced and combined to give a good field estimation result in an electrically large-scaled structure.