2.3 A four-port network has the scattering matrix shown as follows:2.3.1 Is this network lossless? (Give a reason for your answer) 2.3.2 Is this network reciprocal? (Give a reason for your answer) 2.3.3 What is the return loss at port 1 when all other ports are terminated with matched loads? (Show all working)

0.17890 0.6/450 0.4/450 0 0.62450 0 0 0.34-450 [S] = 0.4/450 0 0 0.52-450 0 0.34-45 0.54-450 0