Mobile antenna system for direct broadcasting satellite

A television broadcasting service via a direct broadcasting satellite (DBS) is already operational in Japan with many residential subscribers. In addition, many people want to watch the DBS broadcasting even in cars, because DBS broadcasting has advantages over terrestrial television broadcasting such as high quality, simultaneity, and wide coverage. Several mobile antenna systems for the DBS have been developed previously. These systems have a high performance for receiving, but there is a problem that these systems are still too tall to be installed on a car. Therefore, we have reduced the height of the antenna system, and have realized a small and extremely low-profile mobile antenna system that is mountable on a car. This paper presents an outline and features of the antenna system developed.