On the sensitivity of causality filter parameters

In this paper we examine an existing method of causality verification. Specifically, we examine the effect of filter specifications, choice of negative time duration, and the maximum sample frequency, on the method's ability to detect causality of sampled scattering parameters of a finite bandwidth. Our study reveals that although the method is novel in its simplicity and ease-of-implementation, its ability to detect non-causality of sampled data is very much dependent on the choice of above parameters.