HI, I want to know how to calculate power imbalance in MMI.
MMI is characterized by insertion loss and power imbanlance. Also, MMI has power distribution ratio.
Sugggesting, there is a 1X2 MMI, the insertion loss can be calculated by S Matrix component S21 and S31：
Then, how to calculate the power imbalance and power distribution ration on the premise that S parameters are already available in MODE solution?
This question may be somewhat silly and inappropriate, but I really want to know.