PURPOSE: To provide the antenna system in which a radio wave coming from plural satellites is received by an individual primary radiator employing one reflecting mirror and an arm supporting the primary radiator is placed beneath the reflecting mirror.

CONSTITUTION: An arm 6 is extended to a front side of a reflecting mirror 5 from a lower position of the reflecting mirror 5 and plural primary radiators 7, 8 are mounted to a free end of the arm 6. The primary radiators 7, 8 are deviated mutually vertically so that the primary radiators 7, 8 are placed to each focal position of a radio wave coming from plural satellites corresponding to each other when the antenna system is installed so that the arm 6 comes nearly just beneath the reflecting mirror 5.