Definition of “attenuation” in Q2D Extractor

- November 9, 2023 at 3:36 am
  
  CCC
  Subscriber
  
  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)
- November 9, 2023 at 3:10 pm
  
  Aymen Mzoughi
  Ansys Employee
  
  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.