A.2 Activation of the Admittance Matrix Calculation Feature

The so-called intrinsic admittance matrix can be obtained by activating the admittance matrix calculation feature in section Solve of the input-deck, see Section A.2. The activation of this feature has the following consequences:

• The AC boundary conditions as specified in the Device section are overruled by the unity voltage.
• The unity voltage is applied once at each terminal while the others are zero. This affects only the right-hand-side vector and the system matrix remains constant.
• For that reason, the multiple-right-hand-side feature of the linear modules is applied. Since the multiple assembly of the system matrix can be skipped, the simulation is sped up significantly.
• Unless suppressAdmittanceOutput is set, the output of the simulator changes from the terminal quantities to the admittance matrix.
• Several additional features and output functions can be used.

The keyword complexPolar in the Log section is provided for printing complex-valued numbers in polar-coordinates.

The example shows the setup for calculating the admittance matrix at the frequency of $1\,$GHz.

Solve
{
   ac = yes;
   frequency = stepSingle(1 GHz);

   calcAdmittanceMatrix = yes;
}