Multi-point Time Domain Computation for Crosstalk Prediction in Printed Circuit Board

Determining the ratio of the mutual inductance and mutual capacitance of a multi conductor transmission line (MTL) on a printed circuit board (PCB) such as in the coplanar stripline is important for predicting and mitigating the crosstalk that can occur in the PCB. However, calculating this value directly from the dimension and the material of the PCB can be difficult. This paper describes the multi-point computation method for determining the mutual inductance and mutual capacitance ratio of a coplanar stripline on a PCB. The model was created and simulated in LTSpice. This value is obtained from the near-end and far-end side parameters of the coplanar stripline. The LTspice simulation result shows that the timedomain multi-point computation result from the near-end and far-end voltage and resistance agrees with the direct calculation from the dimension and the material of the coplanar stripline, with 5% tolerance.