New Radiated Immunity/Susceptibility Test Method Using Four-Septum TEM Cell: Measurements and Field Analysis

A four-septum TEM cell has been proposed as a new radiated radio-frequency immunity/susceptibility test device. The cell provides electromagnetic fields rotating at a very low rate by generating a two sets of balanced-mode fields orthogonally. In this paper, a test method using the cell is clarified, and susceptibility characteristics of two types of microstripline models are investigated to verify the effectiveness of the cell and a role of dielectric material is made clear. In addition, an analysis method of the internal electromagnetic fields, which are different from those used in an ordinary TEM cell, is discussed using a image method.