Before revision: Pozar, Microwave Engineering, Third Edition, John Wiley & Sons: New York, 2005: It is to be noted that it can be set the above expression, and one would obtain the equal-splitting Wilkinson Divider
After revision: Pozar, Microwave Engineering, Third Edition, John Wiley & Sons: New York, 2005: Theis obtained for equal-splitting Wilkinson Divider