研究了在 Ka频段上，宽带微带到波导的转换技术。转换通过波导 -脊波导-绝缘子探针-微带线的方式实现。这样的实现方式具有插入损耗小、可密封、装配一致性好、可靠性高的优点。文中给出了转换的设计方法及脊波导参数的计算公式以计算转换的各项参数。设计完成后采用电磁场软件进行优化仿真，并根据仿真结果制作实物进行测试。最后给出了转换实物的测试数据。从测试数据可以看到，转换在整个 Ka频段内具有良好的性能，插入损耗小于 0.3 dB，驻波小于 1.5。还可针对具体使用频段进行优化，以进一步提高性能。文中提出的转换完全能够满足实际工程应用，具有良好的应用前景。

The technology of transform from microstrip to waveguide at Ka band is researched. The transform is achieved by ridge waveguide and glass seal. The structure has the advantages of low insert loss, high reliability and coherence. The design method of transform and the expressions of the ridge waveguide’s impedance are presented. The result of electromagnetic simulation is also given in this paper. According to the optimum result, the test on the practical transform is carried out. The insert loss is less than 0.3 dB, and the standing wave ratio is below 1.5 dB. Better results can be obtained if the transform is optimized for specified bands. The results can satisfy the engineering requirements.