All‐Dielectric Integrated Meta‐Antenna Operating in 6G Terahertz Communication Window

Abstract Efficient transceivers and antennas at terahertz frequencies are leading the development of 6G terahertz communication systems. The antenna design for high‐resolution terahertz spatial sensing and communication remains challenging, while emergent metallic metasurface antennas can address this issue but often suffer from low efficiency and complex manufacturing. Here, an all‐dielectric integrated meta‐antenna operating in 6G terahertz communication window for high‐efficiency beam focusing in the sub‐wavelength scale is reported. With the antenna surface functionalized by metagrating arrays with asymmetric scattering patterns, the design and optimization methods are demonstrated with a physical size constraint. The highest manipulation and diffraction efficiencies achieve 84.1% and 48.1%. The commercially accessible fabrication method with low cost and easy to implement has been demonstrated for the meta‐antenna by photocuring 3D printing. A filamentous focal spot is measured as 0.86 λ with a long depth of focus of 25.3 λ . Its application for integrated imaging and communication has been demonstrated. The proposed technical roadmap provides a general pathway for creating high‐efficiency integrated meta‐antennas with great potential in high‐resolution 6G terahertz spatial sensing and communication applications.