Abstract: The invention relates to antenna design and may be used in a variety of devices operating within a wide waveband range, including visible, UV, IR, shortwave, UHF, VHF, and other wavebands. The technical effect achieved by the present invention is making the device multifunctional, small, durable, economical, and efficient. The above technical effect is achieved in a multipurpose energy concentrator comprising a reflector and a radiation source or receiver, wherein the reflector is at least a part of the surface of a solid of revolution, and the radiation source or receiver is a distributed system of active or passive elements, respectively, positioned at an identical distance from the reflector equal to between 0.3 and 0.5 of the radius of curvature thereof.

Abstract: A multipurpose device for transmitting radiation from a source to an object comprises two antennas, each designed as a truncated segment of a spherical or cylindrical surface, a radiation source provided in the aperture plane of one of the antennas, and an object placed in the combined focal area of the two antennas. The antennas are positioned opposite one another at a distance of from 0.6 to double the radius of the spherical or cylindrical surface, and the radiation source is of a distributed type. The antenna design effectively concentrates radiation emitted by a distributed source on an object placed in the focal area of the antenna, providing greater efficiency of radiation transmission, the possibility of radiation power variation, a more uniform concentration of radiation, an increase in the volume of the focal area without replacing the radiation source, increased reliability of the system, and reduced power requirements.