Steerable antenna and variable directivity antenna system using the antenna

Folded dipole antenna element at a distance smaller than half the wavelength used (2, 4) are disposed substantially parallel. The antenna elements (2,4) are of different length feed line through a (12, 14) are connected to a combiner (16). The difference in length of the feed line (12, 14), an input signal received the radio waves coming from the front to the antenna elements (2,4) in the antenna elements (2,4) are of the combiner (16) (16a , in phase with 16b), and opposite phases received signal combiner received in the radio waves coming from behind the antenna elements (2,4) antenna elements (2,4) input (16) (16a, 16b) so as to have selected.