ON THE THEORY OF DISCRETE TLM GREENS-FUNCTIONS IN 3-DIMENSIONAL TLM

The response to a wave pulse incident on the boundary of a certain spa tial domain may be represented by discrete TLM Green's functions, On t he other hand, the response to a localized electromagnetic excitation at the boundary of a certain spatial domain may be calculated directly from Maxwell's equations and be represented by analytic TLM Green's f unctions, For low frequencies and small wave numbers, the analytic TLM Green's functions coincide with the discrete TLM Green's functions, A pplying the analytic TLM Green's functions in the absorbing boundary c ondition at the boundary to the open half-space reduces the computatio nal effort considerably when compared with the application of the disc rete TLM Green's functions.