A Ka-band (20/30 GHz) prototype terminal has been developed to demonstrate the effectiveness of using Ka-band for small terminal communications. The design of a versatile VSAT is presented and each key component with its integration into the prototype unit is analysed and discussed. The time scales for the project revolved around the launch of the Olympus satellite on the 12th July 1989 which, along with DFS Kopernikus and the CS series of satellites, have capacity for Ka-band communications. Olympus is an extremely large experimental 3-axis stabilised satellite which was procured by the European Space Agency (ESA) for supporting a variety of technical experiments and demonstrations. The launch of Olympus facilitated a simple VSAT link over the satellite in November 1989. The use of the terminal has proved the feasibility and design of a Ka-band VSAT; the performance of the unit is discussed later in the chapter.