SINGLE-ENDED MULTI-BAND MULTI-MIRROR ANTENNA Russian patent published in 2024 - IPC H01Q5/30 

FIELD: radio engineering.

SUBSTANCE: intended for use as antennas for earth stations of satellite communication systems with UHF-EHF transponders located in geostationary orbit, for simultaneous operation in three frequency bands. For this purpose, an asymmetrical multi-band multi-mirror antenna is proposed, which consists of three feeds, a reflector - the main mirror in the form of an asymmetrical cutout from a paraboloid of rotation, and a counter-reflector - an auxiliary mirror, which is located relative to the reflector on the other side of its focal axis and has the shape of an asymmetrical cutout from a paraboloid rotation, coaxial to the reflector and with its apex facing away from the reflector. An irradiator of the first frequency range is installed in the focus of the counter-reflector, which coincides with the focus of the reflector. The irradiator of the second frequency range is installed at the focus of the secondary reflector, which has the shape of an asymmetrical cutout from a paraboloid of revolution, the focal axis of which coincides with the focal axis of the reflector, and the apex faces away from the counter-reflector, and the projections of the counter-reflector and the secondary reflector onto a plane perpendicular to the focal axis coincide. The third frequency range feeder is installed in the first focus of the secondary counter-reflector in the form of an asymmetrical cutout from an ellipsoid of rotation, the second focus of which coincides with the focus of the secondary reflector. The irradiators are inclined relative to the focal axis of the reflector and their radiation maxima are oriented: the irradiator of the first frequency range - towards the reflector, the second range - towards the secondary reflector, the third range - towards the counter-reflector.

EFFECT: increasing the efficiency of the antenna while simultaneously receiving radio waves of three frequency ranges.

1 cl, 1 dwg