RFHIC’s RRK56578K5-790, is an 8.5kW, C-band, GaN solid state transmitter designed for high power radar applications. The RRK56578k5-790 is designed with RFHIC’s state of the art gallium-nitride (GaN) on SiC HEMT, providing excellent thermal stability and high voltage breakdown. This solid-state transmitter allows upgrading the existing VED (Vaccum Electronic Device, such as Klystron, Magnetron, Travelling Wave Tube, and Cross Field Amplifier) based transmitter for radar applications.