HFSS15: Scattered and total field formulation pros and cons

Scattered field formulation

• Mostly for plane waves and analytical waves

• Cancellation errors when total field is weak

• Problems arise at infinite scatterers (slot in an infinite conducting plate)

• Near/far incident waves are not known in the whole region

Total field formulation

• Applicable for any incident pattern

• Cancellation errors when scattered field is weak

• Infinite scatterers can be treated

• Applicable to near/far field, too, since excitations have to be known on surfaces

• New, space port concept (decomposition differs from the literature).