Realization of two-dimensional beam scanning in 0.2 THz band with the combination of frequency sweeping and phased array method

Abstract Based on terahertz (THz) waves, the realization of mobile high-speed communication and rapid high-resolution imaging through two-dimensional (2D) electronically controlled beam scanning antennas holds significant research merit. However, accomplishing 2D electronically controlled beam scanning within the THz band poses formidable challenges. This paper presents a novel design methodology for a 2D beam-scanning antenna specifically tailored for the THz frequency range. Operating effectively within 190 GHz–210 GHz, the proposed antenna demonstrates frequency-controlled beam scanning along one dimension, while leveraging phased array technology to achieve phase-controlled beam scanning in the orthogonal dimension. Based on the proposed concept of combining frequency scanning and phased array to realize 2D beam scanning, the 2D electronically controlled beam scanning in the THz band was be ultimately realized in this paper. This antenna holds pivotal application potential in enhancing the acquisition efficiency of THz imaging field of view, augmenting the capability to capture moving targets, and advancing the development of next-generation mobile communication technologies, notably 6 G.