SLOT ANTENNA WITH AN ABSORBENT COATING CONTAINING NANOSTRUCTURED CONDUCTIVE THREADS FROM SEMIMETALS Russian patent published in 2020 - IPC H01Q13/10 

FIELD: antenna equipment.

SUBSTANCE: invention relates to antenna engineering and can be used in radars, aircraft and radio communication to reduce radar visibility of aircraft. Disclosed is a device which is a slot antenna made of a section of a rectangular waveguide with slots arranged in a row in a wide wall of the waveguide, on surface of which there is a rectangular plate made of non-selective absorbing coating, which is a polymer base containing nanostructured conductive threads from semimetals, wherein length and width of plate exceed corresponding dimensions of wide wall of waveguide antenna by value of not less than (1/16)λ, where λ is slit antenna wave operating wavelength, and thickness of plate does not exceed value (1/8)λ, wherein plate comprises holes, position and shape of which correspond to antenna slots with observance of their common geometrical similarity, with dimensions exceeding dimensions of antenna slots so as to provide projection of edges of plate holes beyond edges of slots by value of not more than (1/100)λ, and is installed so that holes in plate and slit in antenna are located coaxially to each other.

EFFECT: invention reduces effective scattering area of slot antenna while maintaining its radiative and receiving properties.

1 cl, 4 dwg, 1 tbl