All you have to do, is to calculate the values of [z1, z2, R] also to make a matched Wilkinson Power divider, you need a matching transformer at port 2 and 3 (o/p ports), in micro-strip technology it is just a quarter wavelength of impedance z, you will need 2 quarter wavelengths and you can calculate its impedance with z3 = sqrt(50xz1) for port 2 and z4 = sqrt(50xz2), where z1 and z2 are the impedance of the 2 branches port 2 and 3 respectively before the matching transformer.

z1 = 294.89427878

z2 = 29.48942788

z3 = 88.9139705

z4 = 28.11706626

R = 173.92527131

There are many Wilkinson power divider calculator online you can use.

I need a Wilkinson 1:8 power divider calculator

For Wilkinson 1:8 power divider

• Z1 = 252.26892458 Ω
• Z2 = 31.53361557 Ω
• Z3 = 84.08964153 Ω
• Z4 = 29.73017788 Ω
• R = 159.09902577 Ω

This is Wilkinson Power divider Calculator.

https://www.everythingrf.com/rf-calculators/wilkinson-power-divider-calculator

Good information can be found in the following website

https://www.microwaves101.com/encyclopedias/multistage-wilkinsons