high effiency microstrip or waveguide combining

i am working on high power sspa I need material or any paper on waveguide combining in ku band (13 to 15 Ghz)is it possible to combine ku band high power around 30 watt on microstrip?

This is a commercial stripline coupler operating in your band. The power capacity is in the vicinity of what you want, so yes, it is possible.

I did not look for others but they exist.

http://w*w.krytar.com/pdf/3100265K.pdf

i need design material not the commercial product