MULTI-FOCUS OFFSET MIRROR ANTENNA Russian patent published in 2018 - IPC H01Q5/00 

FIELD: radio engineering.

SUBSTANCE: invention is intended for use as part of radio engineering devices of television, radio broadcasting and radio communication through artificial satellites of the Earth in the geostationary orbit, in the decimeter, centimeter and millimeter wave bands. Antenna consists of a system of irradiators operating in different frequency ranges and a mirror (reflector). In this case, the reflector itself consists of several layers in the form of asymmetrical cuttings from paraboloid rotation, vertices and focal axes of which coincide, but the focal lengths of the paraboloids are different and the phase center of one of the irradiators of the system is located at the focus of each layer. Layer with the largest focal length is a well conducting surface, the remaining layers are frequency-selective surfaces, which with minimal loss pass electromagnetic waves of layers with a large focal length and reflect waves of other ranges.

EFFECT: reduction of electromagnetic losses in the antenna due to the elimination of devices for dividing the frequency bands while maintaining the directional characteristics.

1 cl, 1 dwg