HOW HFSS calculate Gamma?

- July 6, 2022 at 7:47 pm
  
  Parsa
  Subscriber
  
  Hello,
  I am calculating attenuation (real part of Gamma) in a transmission line with HFSS. But the results are not in range with what I calculate from ABCD matrix.
  I want to know how HFSS calculates GAMMA?
  I am using S-parameters calculated from HFFS and plugging them into the following equations to calculate Gamma:
  
  Thank you.
- July 20, 2022 at 11:41 am
  
  Praneeth
  Ansys Employee
  
  Hi Parsa,
  The approach you are using is correct. Please verify your calculations one more time.
  Best regards,
  Praneeth, Ansys.
  - November 10, 2023 at 3:11 am
    
    Liu YUtong
    Subscriber
    
    Could you tell me how HFSS calculates GAMMA?
    - November 13, 2023 at 5:51 am
      
      Praneeth
      Ansys Employee
      
      Hi Liu,
      HFSS treats ports are connected to the transmission lines of the same cross-section and gamma is the propagation constant of that transmission line. Please go through the "Complex Propagation Constant" section of the HFSS help document for detailed information about the same.
      Best regards,
      Praneeth.
- November 10, 2023 at 3:10 am
  
  Liu YUtong
  Subscriber
  
  hi,I'm also confused about this issue, have you solved this problem?