Numerical Green’s Function

In simulations where the excitation of the structure needs to be changed frequently—such as adjusting the amplitudes of discrete sources or altering the direction of arrival of an incident field—the Numerical Green’s Function (NGF) option can save significant computation time. To enable this option, navigate to the Settings panel of the Setup tab, as shown in Fig. 1.

How NGF Works

• During an NGF calculation, the LU-decomposed matrix of the system is stored in a file after the initial computation.
• Subsequent calculations reuse this stored matrix, allowing them to be performed much faster than the initial one.

Automatic NGF Activation

• When transmission lines are included in the model, the NGF option is automatically enabled.