Susceptibility frequency regions of deterministic loads connected to circuits with arbitrary characteristics

In this paper, the parameters that determine the resonance frequency bands of circuits with arbitrary elements are studied. Antenna theory is used to analyze the radiated electromagnetic susceptibility of an arbitrary circuit with a deterministic susceptible load. From the gain and the transmission coefficient between the circuit and the load, two parameters to describe the complete circuit behavior are proposed. Then, these parameters are expressed in terms of variables of a Norton equivalent circuit and the independent variables that determine the frequency response of the circuit are deduced. From this analysis, it is possible to relate the frequency ranges in which the susceptibility to radiated disturbances increases.