Learning Forum

[CCC]

Does anyone know the definition of the Attenuation under "Create Matrix Report". Specifically, in my transmission model, there are three signal conductors. What does the mode mean in the AttenModal(Mode1), AttenModal(Mode2), AttenModal(Mode3)

[Aymen]

The attenuation is described in the 2D Extractor help:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/Electronics/v232/en/home.htm%23../Subsystems/Q3DExtractor/Content/Q3D/ModalAnalysisofLossyTransmissionLines.htm?TocPath=Q3D%2520Extractor%257CQ3D%2520Extractor%2520Help%257C2D%2520Extractor%2520Technical%2520Notes%257CTransmission%2520Line%2520Circuit%2520Models%257CDistributed%2520Models%2520for%2520Transmission%2520Lines%257CLossy%2520Transmission%2520Lines%257C_____1

The propagation constants γ_n are complex numbers with real part α_n and imaginary part β_n.

It can be seen that α_n represents the attenuation per unit length that the mode experiences as it moves down the transmission line. The imaginary part β_n represents the change in phase per unit length.