ANTENNA Russian patent published in 1997 - IPC

FIELD: antenna devices for satellite and earth communication. SUBSTANCE: device has two-layer electrodynamic structure which layers are connected to each other by electromagnetic field. One layer has exciting coaxial; emitting aperture is partly transparent; layers of electrodynamic structure are made from rectangular waveguides which electromagnetic connection is provided by two narrow slots which are cut along their common wall in parallel to side walls of rectangular waveguide. Outer part of wall of rectangular waveguide is shaped as partly transparent emitting aperture. In addition two spaced partly transparent arrays are located in rectangular waveguide with exciting coaxial along all length of waveguide and in parallel to communication slots. Exciting coaxial is located in center of volume which is shaped by said arrays. The following equations are held: , where a_i is distance between communication slots to side walls of rectangular waveguide with emitting aperture; L is size of emitting aperture of antenna in direction which is perpendicular to communication slots; h is wave speed constant for rectangular waveguide with exciting coaxial; l_i,i = 1,2 are respectively distances from partly transparent arrays to nearest communication slots; 2b is distance between transparent arrays. EFFECT: reduced gap in beam pattern, decreased losses and facilitated manufacturing. 3 cl, 1 dwg