* In the '''Port Definition''' Dialog, set the number of ports equal to one. Associate the lumped source with Port 1. Set the value of '''Port Impedance''' properly equal to the characteristic impedance of the microstrip feed line.
<font color="red"><u>'''NOTE: {{Note|If you want to model a microstrip structure with a laterally infinite substrate and a laterally infinite ground plane, make sure to set the domain offsets in the ±X, ±Y and -Z directions equal to zero.'''</u></font>}}
[[Image:FDTD50.png|800px]]