MONOPULSE WAVEGUIDE ANTENNA ARRAY Russian patent published in 2024 - IPC H01Q3/00 

FIELD: antenna equipment.

SUBSTANCE: invention relates to antenna engineering and can be used in radar systems using a monopulse method of measuring angular coordinates of objects. Technical result is achieved by the fact that the monopulse waveguide antenna array consists of a beam-forming device, distributors and radiating panels connected to them, which consist of lines of radiators. At the same time it differs from the prototype by the fact that it additionally includes units of amplitude-phase correction (UAPC), each of which is installed respectively between one of the outputs of the beam-forming device and one of the distributors of the antenna array. Each UAPC is made on the basis of a waveguide tube of rectangular section with wide and narrow walls, and contains an adjustable attenuator, which includes the main waveguide, a group of communication slots, the centre of which is located on the axis of symmetry of the wide wall of the main waveguide, as well as a waveguide with matched waveguide loads installed in its channel on the end sides, adjacent to the wide wall of the main waveguide on the side of the group of communication slots with provision for passage of a high-frequency signal from the main waveguide into it, and adjusting screws. Besides, the UAPC has an adjustable phase shifter including adjusting screws inserted inside the main waveguide along the axis of symmetry of its narrow wall. At that, accuracy and range of amplitude and phase shift value adjustment at UAPC inputs should provide required antenna excitation field symmetry, achieving the required zero depth and minimum difference in signal levels in the maxima of the beam pattern of the difference channel in the entire operating frequency range.

EFFECT: higher accuracy of determining angular coordinates of objects by introducing additional nodes of amplitude-phase correction in order to obtain the required symmetry of the antenna excitation field, achieving the required zero depth and minimum difference in signal levels in the maxima of the beam pattern of the difference channel in the entire operating frequency range.

1 cl, 5 dwg