WAVEGUIDE-SLOT ANTENNA ARRAY Russian patent published in 1997 - IPC

FIELD: radio engineering. SUBSTANCE: device has hollow rectangular waveguide which height is less than half of wavelength and which one end is fed by means of linear waveguide-slot array which excites phase-clocked wage edge. In addition flat periodic array is provided in wide wall of waveguide. Said array contains slot emitters which are located in perpendicular to waveguide axis in nodes of rectangular coordinate reference system. In addition rectangular metal cramps are located in symmetry along wide wall of waveguide above emitters. Height of cramps is not greater than half of wavelength and which width is equal to half of wavelength. EFFECT: suppression of parasitic diffraction side lobes in beam pattern of antenna array when multiple mode waveguide without dielectric filling is used; increased antenna matching. 1 dwg