Pico-second signal transient characterization technique of meanders through s-parameter measurement in high-speed PWB interconnects

In this paper, three s-parameter based techniques of meandering traces modeled on uniform transmission line model, optimized Π-network model, and the Cauer network synthesis technique, are presented to obtain time-domain responses using time domain circuit simulators as like SPICE. And the results of simulation are compared at operating frequencies of 100 MHz, 250 MHz, and 500 MHz, respectively. Model-dependant delay difference between the uniform transmission line model and optimized Π-network model at the frequency of 500 MHz is found to be about 32%. From these simulations, we can find that a selection of the proper model according to operating frequency on PWBs is important to obtain accurate signal integrity