METHOD FOR REDUCING THE NOISE TEMPERATURE OF MULTIBEAM TWO-MIRROR ANTENNAS WITH A SHIFTED FOCAL AXIS Russian patent published in 2023 - IPC H01Q1/52 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and serves to reduce the noise temperature of multibeam two-mirror antennas with an offset focal axis. The effect is achieved by the proposed method for reducing the noise temperature of multibeam two-mirror antennas with a displaced focal axis, which consists in installing on the specified antenna, the reflector of which consists of two separate halves, symmetrical to each other with respect to the plane of the feed arc and formed by rotation around the common axis of the corresponding monotonous parts of the parabolas with a shift of the focal axes, a conducting screen in the form of a cutout from a circular cylinder, characterized in that the axis of symmetry of the cylinder coincides with the axis of rotation of the halves of the reflector, the radius of the cylinder is equal to the radius of the inner edges of the halves of the reflector, the angular opening of the cutout in the plane of the arc of the irradiators coincides with the angular opening of the halves of the reflector in the same plane, the notch height is equal to the distance between the inner edges of the reflector halves, and the screen itself is installed in the gap between the reflector halves so that the edges of the screen are aligned with the inner edges of the reflector halves.

EFFECT: increasing the noise quality factor of the receiving system of the satellite earth station by reducing the noise temperature of the receiving antenna.

1 cl, 2 dwg