高速差動線路の銅箔表面粗さを考慮した伝送と位相特性の解析検討

摘要

Conventional Signal Integrity (SI) simulations, which are used to analyze the quality of the signal of differential lines, employ an analysis method to adjust the relative permittivity and the loss tangent using S_(dd21) of the S parameter to the measurement result, and the S_(dd21) of the S parameter can confirm the characteristics of the transmission loss to create a differential line model. However, in this technique, the precision of the phase delay time is not sufficient to analyze high-speed differential lines. The analysis result using S_(dd21) which considered copper foil surface roughness agreed with the measurement of the transmission-loss and the phase delay time.