A power generation system , comprising: a compressor having an inlet and outlet, a recompressor connected to the compressor outlet, and a turbine connected to the recompressor and having an outlet and inlet, and a heater connected to the turbine inlet and a cooler connected to the inlet of the compressor; a high temperature recuperator and a low temperature recuperator each of said recuperators having a hot stream inlet and cold stream inlet and a hot stream outlet and cold stream outlet, wherein the hot stream inlet of the high temperature recuperator is connected to the turbine outlet and its cold stream inlet is connected to the cold stream outlet of the low temperature recuperator, and the hot stream outlet of the high temperature recuperator is connected to the hot stream inlet of the low temperature recuperator and its cold stream outlet is connected to the heater and wherein the cold stream inlet of the low temperature recuperator is connected to the compressor outlet and its hot stream outlet is connected to the cooler wherein said high and low temperature recuperators each comprise a plurality of matrix panels each formed of fiber reinforced ceramic and polymer derived ceramics composite interconnected together and defining hot fluid microchannels and cold fluid microchannels arranged adjacent to each other in a counterflow and stair-step configuration; and further comprising a diffusion bond between adjacent matrix panels that secures respective adjacent matrix panels together, wherein each recuperator defines a longitudinal axis and an inlet and outlet end along the longitudinal axis, and said matrix panels extend in a direction diagonal to said longitudinal axis and straighten at the inlet and outlet end. a compressor having an inlet and outlet, a recompressor connected to the compressor outlet, and a turbine connected to the recompressor and having an outlet and inlet, and a heater connected to the turbine inlet and a cooler connected to the inlet of the compressor; a high temperature recuperator and a low temperature recuperator each of said recuperators having a hot stream inlet and cold stream inlet and a hot stream outlet and cold stream outlet, wherein the hot stream inlet of the high temperature recuperator is connected to the turbine outlet and its cold stream inlet is connected to the cold stream outlet of the low temperature recuperator, and the hot stream outlet of the high temperature recuperator is connected to the hot stream inlet of the low temperature recuperator and its cold stream outlet is connected to the heater and wherein the cold stream inlet of the low temperature recuperator is connected to the compressor outlet and its hot stream outlet is connected to the cooler wherein said high and low temperature recuperators each comprise a plurality of matrix panels each formed of fiber reinforced ceramic and polymer derived ceramics composite interconnected together and defining hot fluid microchannels and cold fluid microchannels arranged adjacent to each other in a counterflow and stair-step configuration; and further comprising a diffusion bond between adjacent matrix panels that secures respective adjacent matrix panels together, wherein each recuperator defines a longitudinal axis and an inlet and outlet end along the longitudinal axis, and said matrix panels extend in a direction diagonal to said longitudinal axis and straighten at the inlet and outlet end. <EOS>