帽结构振荡器是输出功率最大、转换效率最高、具有代表性的固态振荡器,但至今缺少较全面的电磁分析。本文以谐振腔激励和波导中电磁辐射理论为基础,首先通过0价近似研究,指出了波导内径向腔的激励和谐振模式控制的基本原理。尔后讨论了径向腔内TM_(11),TM_(21)和TM_(01)谐振模式在矩形波导内的电磁辐射特性。着重从微波电路考虑,给出了设计中应该遵守的原则,并附上相应的实验结果。 Cap structure oscillator is the output power of the largest, most efficient conversion, the representative of the solid state oscillator, but so far the lack of more comprehensive electromagnetic analysis. Based on the theory of cavity excitation and electromagnetic radiation in waveguide, the basic principle of excitation and resonance mode control of radial inner cavity of waveguide is pointed out through the zero-price approximation. The electromagnetic radiation characteristics of TM_ (11), TM_ (21) and TM_ (01) resonance modes in a rectangular waveguide were discussed. Focus on the microwave circuit considerations, given the principle should be observed in the design, and attach the corresponding experimental results.