MULTIBEAM MULTIBAND MULTIMIRROR ANTENNA WITH AXISYMMETRIC COUNTER-REFLECTORS Russian patent published in 2022 - IPC H01Q19/19 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio engineering and is intended for use as antennae of earth stations of satellite communication systems with repeaters of SHF-EHF ranges located on a geostationary orbit, for simultaneous operation with several artificial the Earth satellites, each of which operates simultaneously in three frequency ranges. Multibeam multiband multimirror antenna with axisymmetric counter-reflectors consists of systems of radiators located on three concentric arcs of circles lying in one transverse plane, main mirror-reflector, having in the longitudinal plane, orthogonal to the plane of circular arcs, the shape of a parabola, axisymmetric auxiliary mirrors-counter-reflectors and coaxial with them additional axisymmetric mirrors-reflectors and mirrors-counter-reflectors. First arc of the radiators passes through the focus of the parabola forming the reflector and comprises the radiators of the first frequency range. Cross-section of each counter-reflector has the form of a parabola concave to the side of the reflector, the focal axis, which is the axis of symmetry of the counter-reflector, and the focus of which is aligned with the focal axis and the focus of the parabola in the cross-section of the reflector. Cross-section of each additional mirror-reflector is similar to the cross-section of the reflector, and its longitudinal size coincides with the same size of the corresponding counter-reflector. Cross-section of each additional mirror-counter-reflector has the form of an ellipse, the near focus of which coincides with the focus of the additional reflector. On the arc passing through this focus there are radiators of the second frequency range. Irradiators of the third frequency range are installed on the arc passing through the far focus of the ellipse. Focal axes of the additional reflector mirror and the counter-reflector mirror, which are their axes of symmetry, are aligned with the focal axis of the corresponding counter-reflector.

EFFECT: high efficiency of the antenna at simultaneous reception of radio waves in three frequency ranges.

1 cl, 2 dwg