The paper is devoted to the development of the single antenna as an element of the array, intended for radiating electromagnetic fields with different orders of the orbital angular momentum (OAM) in the band 77 ÷ 78.5 GHz. Multiplexing by OAM provides more opportunities for safe data transmission and increases the quantity of the simultaneously transmitted channels. The antenna design takes into account the special requirements for its structure, imposed by its practical usage in the array. The

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... modeling process includes calculating the dimensions, selecting the suitable materials (Rogers RO 3003) and components, simulating with the software and analyzing the following characteristics: VSWR, return loss S 11 , input impedance, and radiation pattern. The designed antenna's configurations correspond to a half-wave dipole, fed by coplanar waveguide port and matched to 50 Ohm impedance. The VSWR for all cases is less than 1.8, the radiation pattern is quite wide. The shape and size for the proposed antennas provide an easy combination of such elements in the array, including the issues of the feeding lines simplicity. The application areas are described.