A Decomposed RLGC Model for Fast Skew Evaluation of Fiber Weave Effect

As the increase in data rate, the fiber weave effect (FWE) of substrates has attracted attention in recent years; however, the equivalent circuit model is still not well solved due to their extremely complicated 3-D physical structure. This letter presents a decomposed resistance, inductance, conductance and capacitance (RLGC) model to fast evaluate the impact of FWE on high-speed signals. The circuit model is generated directly from the physical dimensions of the transmission lines (TLs) and the parameters of the glass fiber. Compared to previous 3-D and 2-D physical modeling methods, the proposed method reduces computational complexity and saves a great deal of computing resources. The simulated results show high consistency with 3-D simulations by HFSS. The mean error of time skews of several glass types between HFSS, and the proposed model is 3.05%. The proposed method provides a promising method for fast FWE modeling.