Abstract: An RF power splitter-combiner for use in an amplifier system of the kind requiring both RF power splitting and RF power combining, comprising: RF splitter means containing a top and bottom wall, splitter input means centrally located therein and a plurality of splitter output means, said plurality of splitter output means being spaced a predetermined radial distance from and evenly angularly spaced about said input means; RF combiner means, said combiner means having a top and bottom wall, a plurality of input means and an output means, said input means being spaced a predetermined radial distance from and evenly angularly space about said output means; said splitter means containing an internal chamber and having a plurality of circular ridges and channels located in said splitter chamber concentric of said splitter input means; said combiner means containing an internal chamber and a plurality of circular ridges and channels located in said combiner chamber concentric of said combiner output means; said rid