RU94042712A - Slotted-guide array - Google Patents

Abstract

FIELD: radio engineering. SUBSTANCE: invention is meant for suppression of parasitic diffraction lobes in directivity pattern of array with use of multimode waveguide without dielectric filling and for improved matching of antenna. Slotted-guide array has hollow multimode rectangular waveguide with height not exceeding half of wave length fed from one input of linear slotted-guide array and exciting cophasal wave front in waveguide. Wide wall of waveguide includes periodic grating composed of slot radiators lateral to axis of waveguide which are positioned in nodal points of rectangular grid of coordinates. Rectangular metal clamps with height not exceeding half length of wave and width equal to half of length of wave are mounted in symmetry along wide wall of waveguide above radiators. EFFECT: suppression of parasitic diffraction lobes in directivity pattern of array.

Claims (1)

The invention relates to radio engineering, in particular to slotted waveguide antennas. Purpose: suppression of spurious diffraction lobes in the antenna array radiation pattern using a multimode waveguide without dielectric filling and improving antenna matching. This is achieved by the fact that in a waveguide-slit grating containing a hollow multimode rectangular waveguide with a height not exceeding half the wavelength, fed from one input by a linear waveguide-slit grating that excites a in-phase wave front in the waveguide, with a plane periodic waveguide made in the wide wall of the waveguide a lattice consisting of slot-hole emitters transverse to the waveguide axis located in nodes of a rectangular coordinate grid, rectangularly symmetrically mounted on the broad waveguide wall above the emitters suspended metal staples with a height not exceeding half the wavelength and a width of half the wavelength.