I designed 3:2 unequal wilkinson power divider for 4X4 array antenna with Er=2.2 h=.254mm
The impedences for power divider are z0=50ohm z1=Z0*sqrt(k*(1+k^2))=58.327(90deg) z2=z0*sqrt((1+k^2)/k^3)=87.490(90deg) z3=z0*K=40.824 z4=z0/k=61.23 and R=102.062ohm..
s31 parameter are invalid when i simulate the design..Can u tell me what wron