need help to design a 3-way power combiner

[couchpotato16]

hi all!

can anyone help me to design a 2.45 GHz three-way power combiner on a FR4 board with substrate permitivity of 4.7 and thickness 1.6 mm, loss tangent 0.0025, copper height is 0.04 mm. impedance is 50-ohm. I only have Ansoft and CST for simulations.

i'm kinda new to this but i've already done some research and found out that's its very difficult to fabricate 3-way splitters/combiners in planar because of the crossovers. and i don't know how to determine the dimensions of the lines (width, length, miter).

can anybody help me?
thanks in advance

 

[alak]

THis patent might help you out. you can do the designing in IE3D as it is planar.

 

[mauroferrari_]

Remember that it is possible to design the resistance-net in two ways:

1) star network
2) triangle network

You can try if with some of this net you resolve your problem

 

[ucah]

kindly note that FR4 loss tangent is close to 0.02, not 0.0025.