User-s Matrix Question

- July 28, 2021 at 11:33 pm
  
  samishi
  Subscriber
  
  Hi,
  I am trying to determine the coupling coefficient between a bus waveguide and a resonator, and I have a clarification question about the user-s matrix. Is the transmission value returned (e.g. S12) equal to the transmission coefficient or do you have to square it to obtain the actual transmission coefficient?
  Thank you.
- July 29, 2021 at 3:22 pm
  
  Guilin Sun
  Ansys Employee
  
  In general, S12 is the complex amplitude transmission coefficient, and abs(S12)^2 is the power transmission. Please review your own definition of "transmission coefficient".
- August 1, 2021 at 6:19 am
  
  samishi
  Subscriber
  
  Thank you!