A multiband antenna system

摘要

There is described a multiband antenna system for operating at L-band, S-band and UHF-band comprising L-band antenna elements (1) and S-band antenna elements (2) provided in the form of quadrifilar helices spaced from each other on the surface of a hollow cylindrical insulator (4); UHF band antenna elements (3) provided in the form of a cage dipole on the surface of the said hollow cylindrical insulator (4); the L-band antenna input being connected to a first connector (5) through an L-band feed network card (8); the S-band antenna input being connected to a second connector (6) through an S-band feed network card (9) and the UHF-band antenna input being connected to a third connector (7) through a split sheath balun (10) provided along the axis of the said hollow cylindrical insulator (4).