Study of a hemispherical metamaterial lens made of parallel printed circuit boards with metal diffusers of small electrical dimensions

Antenna systems based on hemispherical lenses allow full azimuth scanning or electronically controlled sector scanning. The article presents a numerical simulation of a broadband multi-beam antenna system based on a hemispherical metamaterial lens made of parallel printed circuit boards with metal diffusers of small electrical dimensions. The effective parameters of a metamaterial based on printed Jerusalem crosses with welded-in transverse metal pins are investigated. The selected geometric dimensions of the metamaterial made it possible to reduce the effect of anisotropy. Directional patterns are considered when a lens is excited by a system of broadband vibrators with two orthogonal polarizations. For each polarization, conclusions are drawn about the operating range and the magnitude of the losses. The results obtained in this work are planned to be used in the future in the design of wideband lens antennas from parallel printed circuit boards.