TRAVELLING WAVE LINEAR SLOTTED WAVEGUIDE ARRAY Russian patent published in 2010 - IPC H01Q13/10 

FIELD: physics; radio.

SUBSTANCE: invention relates to radio engineering, particularly to slotted waveguide antennae, and can be used independently or as a component of a phase antenna array (PAA) with mechanical scanning in two planes or electronic scanning in the E-plane and mechanical scanning in the H-plane. The device consists of a length of waveguide with longitudinal slots made on its wide wall and lying on different sides of axial line. The technical result is achieved due to that, the length of the rectangular waveguide has a flat-topped section with dimensions forming the outer contour on the wide wall a₁=(0.45±0.05)λ₀ and on the narrow wall b₁=(0.26±0.05)λ₀ and forming the inner contour with dimensions of the wide wall a₂=(0.27±0.05)λ₀ and the narrow wall b₂=(0.15±0.05)λ₀, where λ₀ is wavelength in free space. On the wide wall there are metallic edges with radiating slots, where the edges are a continuation of the narrow walls of the outer contour with height equal to λ₀/2 or greater, and the length of the radiating slots is greater than λ₀/2. Dimensions and displacement relative the axis of the flat-topped waveguide are selected based on the required level of the signal radiated from each slot, and comply with the condition for minimal change of the level of signal radiated from each slot in the given frequency range.

EFFECT: reduced size of the waveguide in the E plane.

2 dwg