The most well-known beamforming device (DOU) (for linear and flat MAR) is the Rothmanlens, which is of great interest because it allows you to form a fan of MAR rays in a wide spatialsector of angles (wide-angle scanning), has a fairly high efficiency and MAR with a lens Rothmanhas a low level of side lobes. Another advantage of the MAR with a Rothman lens is the weak dependenceof the position of the rays in space on frequency, in contrast to the MAR with a Butlermatrix DOE, in which, at a high efficiency (theoretically 100%), the position of the rays dependson the frequency. However, the previously developed analogs of the Rothman lens are large andrequire additional components in the design, which affects the transmission coefficient of the lensin the operating frequency range from 2 GHz to 20 GHz and the consistency of the device withother components of the transceiver equipment. It follows that the study and modernization of lensstructures in relation to multibeam antenna arrays (MAR) is a topical topic for research. The purposeof the work is to propose a method for calculating the Rotman lens, modernize the lens design,make a lens model and conduct an experimental study of the lens in order to obtain constructivemethods for optimizing the characteristics of the Rotman lenses for use in MAP in the frequencyrange from 2 GHz to 20 GHz. In the results of the article, the dimensions of the lens, themass of the lens, the transmission coefficient, and the simplicity of the design are estimated incomparison with the previously developed analogues. A technique for calculating the geometry ofa Rotman lens is proposed, the SWR of a printed Rotman lens is experimentally studied on a vectornetwork analyzer, constructive methods are obtained for optimizing the characteristics of Rotmanlenses for use in multibeam antenna arrays. A model of a broadband Rotman lens in microstripdesign with a maximum SWR of 1.3 (S21) in the operating frequency range from 2 to 20 GHz wasmade, the lens size was 150x100, and the lens weight was 0.4 kg. According to these parameters,the Rothman lens surpasses the analogues developed earlier.