Millimeter wave coaxial-waveguide transition structure

The utility model discloses a millimeter wave coaxial-waveguide transition structure, which comprises a J.2.92-KFDB3 joint, a coaxial inner conductor, an insulator, an air cavity, a coaxial probe and a waveguide, a wide-edge opening is arranged above the waveguide, the coaxial probe is arranged in the waveguide, and the coaxial inner conductor is arranged in the waveguide. One side of the coaxial inner conductor sequentially penetrates through the insulator, the air cavity and the wide-edge opening from top to bottom to be fixedly connected with the coaxial probe, and the other side of the coaxial inner conductor is fixedly connected with the J.2.92-KFDB3 connector. The millimeter wave coaxial-waveguide transition structure solves the problems that a traditional transition mode is not sealed and the transmission mode is not flexible, and the millimeter wave coaxial-waveguide transition structure is low in loss, wide in frequency band, small in standing wave and good in sealing performance. 本实用新型公开了一种毫米波同轴-波导过