u can use ro6035htc laminate it can be used at high frequency and also for high power combinations,or u can also confirm by using rogers substrate selection software u can freely download in rogers site.
Very true. All of Rogers hydrocarbon ceramic materials from the RO4xxx series can be processed with "normal" PCB technology.
These materials are RO4003C (er=3.38) , RO4350C (er=3.48) and RO4360C (er=6.15)
The PTFE based materials have lower loss, but require special processing for the vias, which only a few PCB manufacturers offer.
do you really need to design it? I can give you a hint where to find one or more already done - in multi output satellite lnb - they use power dividers to split the signal, you can easily cut the divider from the rest and use it in your own circuit. It is true that this approach is not very professional, but everything depends on what do you want to achieve.