FREQUENCY SCANNING MONOPULSE ANTENNA Russian patent published in 2013 - IPC H01Q3/00 

FIELD: radio engineering, communication.

SUBSTANCE: antenna consists of two travelling wave power dividers in form of short and long waveguide coils fed from a halver - a hybrid T, coupling windows and a waveguide-slit fabric with alternating-inclined slits on narrow walls of lines, wherein each coupling window on the short coil increases in size successively from the first lower coupling window to the last by 1-2%, and on the long coil all coupling windows remain the same and are equal to the size of the coupling window located in the middle of the short coil; inclination angles of slits also increase from the beginning to the middle of the line from 1° to 20°, and from the middle to the end of the line, inclination angles of slits remain the same, without terminal loads in the coils and lines of the fabric with jumper leads at the ends of the lines, lying at quarter-wavelength distance from the last slits in the lines, made in form of metal plates, while providing the required amplitude distribution.

EFFECT: high antenna efficiency and high accuracy of determining angular coordinates in the scanning plane.

3 dwg