Statistics of Impedance and Scattering Matrices of Chaotic Microwave   Cavities with Multiple Ports
  The statistical model proposed in an accompanying paper is generalized to treat multiport scattering problems. Attention is first focused on two-port lossless systems and the model is shown to be consistent with Random Matrix Theory. The predictions are then tested by direct numerical simulation for a specific two-port cavity. Formula are derived for the average transmission and reflection coefficients in terms of the port radiation impedance. The cases of cavity with multiple ports, and with a single port and distributed losses are compared. 
Xing Zheng, Thomas M. Antonsen Jr., Edward Ott