Microstrip-coaxial-waveguide conversion structure and W-band radio frequency front-end assembly

The utility model discloses a microstrip-coaxial-waveguide conversion structure and a W frequency band radio frequency front end assembly, comprising an inflection waveguide, a step conversion structure and an airtight coaxial connector, the inflection waveguide comprises a horizontal end and a vertical end which are vertical to each other; the step conversion structure is a cavity structure, is located in the end part of the horizontal end, is located at the center position of the long side of the turning waveguide, and comprises three stages of steps of which the heights are gradually reduced from the first stage; and one end of the inner conductor of the airtight coaxial connector is connected with the microstrip line. According to the microstrip-coaxial-waveguide conversion structure and the W-band radio frequency front-end assembly, the microstrip line and the step conversion structure are connected through the airtight type coaxial connector, radio frequency signals are converted into coaxial transmissi