BROADBAND ANTENNA SYSTEM Russian patent published in 2014 - IPC H01Q3/26 H01Q21/00 

FIELD: physics, navigation.

SUBSTANCE: invention relates to radar and specifically to broadband antenna systems, the operating frequency range of which overlaps a few octaves. The broadband antenna system comprises a combined monopulse Cassegrain antenna excited by a phased antenna array, operating in the high-frequency range, which includes an annular antenna array of K log periodic dipole antennae and a broadband receiver, wherein the log periodic dipole antennae are located between a parabolic cylinder and a plane which is orthogonal to the longitudinal axis of the antenna and passes through the axis of rotation of a twist reflector, oriented parallel to the axis of the antenna system in the aircraft fight direction and lying in a plane at a tangent to the surface of the cylinder which bounds cross dimensions of the antenna system; elements of the log periodic dipole antennae are in the form of strip conductors located on two sides of a flat dielectric plate.

EFFECT: wider operating frequency range of a combined antenna system operating in active and passive modes.

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