Lumped Interconnect Model
A distributed element can be considered lumped if it is physically “very much shorter” than the distance required for a phase shift of 2? radians
Disadvantages:
- Lack of an accepted lumping algorithm
- Inefficiency of conventional circuit simulators in handling the resultant stiff RLC circuits
- Spurious oscillations due to truncated nature of lumped models
- Difficulty in computing time-of-flight
- Nonlinearities and gain make accurate model reduction “difficult”