MIRROR ANTENNA Russian patent published in 2009 - IPC H01Q19/17 

FIELD: physics, radio.

SUBSTANCE: invention is related to the field of radio engineering, namely, to devices for reception and transmission of electromagnet energy. Antenna comprises semispherical mirror reflector (5), main radiator (MR) in the form of two pairs of linear antenna arrays (1-4) and additional radiator (AR) in the form of two pairs of single (6-9) radiators. MR is installed in maximum of semispherical mirror field focusing in vicinity of paraxial focus. First pair (7, 8) of AR single radiators is installed in front of mirror reflector. Second pair (6, 9) of single radiators is installed in plane that is perpendicular to plane, in which radiators of the first pair are installed, and their apertures are distanced from mirror by distance λ/2 (where λ is wave length in free space). Linear antenna arrays (1-4) are connected pairwise on symmetrical (10, 11) power dividers (PD) of the first order MR, PD outlets of every pair of antenna arrays via phase changer (12, 13) and attenuator (14, 15) are connected to inlets of symmetric (16) PD of the second order MR, outlet of which is connected to the first inlet of nonsymmetrical (28) PD. Outlets (6-9) of single radiators via phase changers (17-20) and attenuators (21-24) are connected to inlets of symmetrical (25, 26) PD of the first order of AR, outlets of which are connected to inlets of symmetric (27) PD of the second order of AR, outlet of which is connected to the second inlet of nonsymmetrical (28) PD with division factor of 0.3/0.7.

EFFECT: increased coefficient of antenna amplification and noise immunity of radiolocating station.

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