This paper presents the design of splash plate dielectric hat feed for Ka-Band tracking radar applications. Dielectric hat feed (DHF) configuration is used by combining a metallic hat sub-reflector and a circular waveguide with the dielectric rod. Splash plate hat with corrugations is used in order to improve side lob levels of antenna, minimize reflection coefficient and improve circular symmetry of radiation patterns. At input of the feed, circular waveguide is divided into four (2 × 2) rectangular waveguides using a circular to rectangular transition. This feed provides three different radiation patterns as SUM, Elevation DELTA and Azimuth DELTA required for tracking radar applications. EM simulation tool has been used for simulation and optimization of the feed and finally reflector simulation tool is used to simulate the exported feed patterns with reflector antenna. Simulated gain and SLL of reflector with designed feed is better than 44 and 25 dB respectively over the frequency band of 34.8–35.2 GHz.