Numerical Green’s Function

There are simulations in which we need to change the excitation of the structure frequently. For example, when we must often adjust the amplitudes of discrete sources or alter the direction of arrival of an incident field. In these cases, we can save a significant amount of time by enabling the NGF (Numerical Green’s Function) option in the Settings panel of the Setup tab, as shown in Fig. 1.

When an NGF calculation is performed, the LU-decomposed matrix of the system is stored in a file after the initial calculation. Subsequently, by reusing this stored matrix, new calculations can be performed more quickly than the initial one.

When transmission lines are included in the model, the NGF option will be automatically enabled.