The satellite multimedia system for cars works in a similar manner to a satellite receiver for television channels. However, a car cannot have a large dish antenna on its roof. The demonstrator vehicle uses a specially designed mobile antenna, reduced in height to make it practical for mobile use.
To receive the signals, the antenna must be pointed towards the satellite. For mobile receivers, the antenna direction must be adjusted as the vehicle orientation changes. On the demonstration vehicle this is accomplished by using a motor to turn the whole antenna.
The New Automotive Tracking Antenna for Low-cost Innovative Applications (NATALIA) project aims to design an antenna that is electronically steerable in both azimuth (compass direction) and elevation (height above the horizon). The design is intended to be suitable for mass production.
Read in full in Novel antenna for in-car satellite receivers