▎ 摘　　要

NOVELTY - The terahertz radiation source has a housing (5) for protecting the terahertz radiation source. An electron gun cathode (1) is arranged on one side of the opening of the housing for emitting a multi-electron beam (2). A grating structure (3) is located inside the housing and has a graphene layer on the surface. A plasmon on the surface of the graphene layer interacts with the multi-electron beam to generate terahertz radiation, for isolating the electron beam. An output port is arranged on the housing for outputting terahertz radiation. USE - Terahertz radiation source for graphene sub-wavelength integrated grating. ADVANTAGE - The terahertz radiation source fundamentally enhances the coupling effect between the electron beam and the integrated high-frequency system, thus improving the beam-wave interaction efficiency, and solves the problem of low interaction power and low output power, when the vacuum electronic device develops to the terahertz band, and greatly improves the output power of a terahertz radiation source, when conducive to the processing of engineering pipes for realization of high-power terahertz sources. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the internal three-dimensional structure of a terahertz radiation source of a planar band-shaped multi-electron injection-excited graphene subwavelength grating integrated high-frequency system. Electron gun cathode (1) Multi-electron beam (2) Grating structure (3) Partition plate (4) Housing (5)