本文设计并仿真了一种W波段矩形波导-微带线的过渡结构。过渡采用探针耦合的形式,这种结构具有结构紧凑,加工容易和插入损耗低等优点。最终的仿真结果表明:在W波段(75-110GHz)的频带内回波损耗优于20d B,插入损耗小于0.3d B。这种结构可广泛应用于毫米波微带线平面电路中。 This paper designs and simulates a W-band rectangular waveguide - microstrip transitional structure. The transition takes the form of a probe coupling, which has the advantages of compact structure, easy processing and low insertion loss. The final simulation results show that the return loss is better than 20d B in the W band (75-110GHz) and the insertion loss is less than 0.3dB. This structure can be widely used in millimeter-wave microstrip line plane circuit.