ANNULAR SLOT ANTENNA Russian patent published in 2020 - IPC H01Q13/00 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering and can be used as transceiving antennas of various radio systems, for example, on mobile objects. Annular slot antenna comprises coaxially installed hollow metal outer cylinder, metal screen made in form of cylinder with closed end, and a hollow metal inner cylinder, first and second conductive rings, first, second, third and fourth feed points. First conducting ring connects end faces of the external cylinder, the screen and the internal cylinder. Another end of the inner cylinder is connected to the shield by means of the second conducting ring. First, second, third and fourth supply points are located on the inner side surface of the screen. Second feed point is radially displaced relative to first feed point by 90°. Third and the fourth feed points are located diametrically opposite to the first and second feed points, respectively. First, second, third and fourth feed points are respectively connected to first, second, third and fourth coaxial connectors, central conductors of which are elongated and connected to outer cylinder.

EFFECT: technical result consists in emitting a field with circular polarization and simplifying the design.

1 cl, 2 dwg