Before you can run an FDTD simulation, you have to define a source to excite your projectâs physical structure. EM.Tempo offers a variety of excitation mechanisms for your physical structure depending on your particular type of modeling problem or application (click on each type to learn more about it):
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{| class="wikitable"
|-
! scope="col"| Source Type
! scope="col"| Applications
! scope="col"| Restrictions
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Lumped Source |Lumped Source]]'''
| style="width:250px;" | General-purpose point voltage source
| style="width:250px;" | Associated with a PEC or thin wire line
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Distributed Source |Distributed Source]]'''
| style="width:250px;" | General-purpose distributed voltage source
| style="width:250px;" | Associated with a virtual rectangle strip
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Microstrip Port |Microstrip Port Source]]'''
| style="width:250px;" | Used for S-parameter computations
| style="width:250px;" | Associated with a PEC rectangle strip
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Coplanar Waveguide (CPW) Port |Coplanar Waveguide (CPW) Port Source]]'''
| style="width:250px;" | Used for S-parameter computations
| style="width:250px;" | Associated with a PEC rectangle strip
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Coaxial Port |Coaxial Port Source]]'''
| style="width:250px;" | Used for S-parameter computations
| style="width:250px;" | Associated with a PEC Cylinder
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Waveguide Port |Waveguide Port Source]]'''
| style="width:250px;" | Used for S-parameter computations
| style="width:250px;" | Associated with a hollow PEC box
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Plane Wave |Plane Wave Sourc]]'''
| style="width:250px;" | Used for scattering computations
| style="width:250px;" | Stand-alone source
| style="width:200px;" | [[EM.Tempo]], [[EM.Illumina]], [[EM.Picasso]], [[EM.Libera]]
|-
| '''[[Glossary of EM.Cube's Excitation Sources#Gaussian Beam |Gaussian Beam Source]]'''
| style="width:250px;" | Used for modeling focused beams
| style="width:250px;" | Stand-alone source
| style="width:200px;" | [[EM.Tempo]]
|}
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# '''[[Glossary of EM.Cube's Excitation Sources#Lumped Source |Lumped Sources]]'''