Last Week's Question
The best computer modeling tool for calculating the electrical balance of a transmission line is a,
- 2D static field solver
- 3D static field solver
- 3D full-wave field solver
- SPICE
Answer
The correct answer is "a". Most transmission line analysis is performed more accurately and efficiently using 2D static field solvers. This includes calculations of characteristic impedance and crosstalk, as well as electrical balance calculations.
3D modeling tools can be used to provide approximate solutions, but they require significantly greater effort and knowledge on the part of the person doing the analysis. Generally, for static solvers, this will require modeling increasingly long sections of the transmission line structure and extrapolating the results. For full-wave solvers, the user must apply an excitation and observe the relative amounts of current induced on each conductor.
SPICE is a useful tool for modeling the structure after it has been converted to an equivalent circuit, but SPICE is incapable of calculating the electrical balance of a transmission line geometry.
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