AXISYMMETRIC MULTI-BAND MULTI-BEAM MULTI-REFLECTOR ANTENNA Russian patent published in 2022 - IPC H01Q3/30 H01Q19/19 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio engineering and is intended for use as antennas for earth stations of satellite communication systems with repeaters of the microwave-EHF bands located in geostationary orbit, for simultaneous operation with several artificial Earth satellites, each of which operates simultaneously in three frequency bands. The substance of the claimed solution lies in the fact that an axisymmetric multi-band multi-beam multi-mirror antenna, consisting of a main reflector mirror with a generatrix in the form of a parabola, symmetrical about its focal axis, an auxiliary counter-reflector mirror, coaxial to the parabola, and irradiators. In this case, the counter-reflector has the shape of a parabola, concave away from the reflector. The focal axis of this parabola is the axis of axial symmetry of the antenna and at the same time the axis of symmetry of the counter-reflector, and in the plane passing through the focus orthogonally to the focal axis, feeders of the first frequency range are installed. An axisymmetric secondary reflector with a cross section similar to that of the reflector and a secondary counter-reflector with a cross section in the form of an ellipse, the focal axis of which coincides with the axis of axial symmetry of the antenna, are installed coaxially on the focal axis of the reflector. In the plane passing orthogonally to the specified axis through the focus of the ellipse, which is farthest from the top of the secondary reflector and coinciding with its focus, feeders of the second frequency range are installed, and in the plane passing orthogonally to the specified axis through the focus of the ellipse, which is closest to the top of the secondary reflector, feeders of the third range are installed frequencies.

EFFECT: improving the efficiency of the antenna while simultaneously receiving radio waves of three frequency bands.

1 cl, 2 dwg