Low-magnetic-field Ka-band coaxial transit time oscillator introducing focusing cathode

The invention relates to a microwave source device in the technical field of high power, in particular to a low-magnetic-field Ka-band coaxial transit time oscillator introducing a focusing cathode. The invention belongs to the technical field of high-power microwaves. The microwave source device comprises a cathode seat, a cathode inner shielding ring, a cathode outer shielding ring, a cathode, an inner conductor and an outer conductor, and the whole structure is rotationally symmetrical about a central axis OO', wherein one end of the coaxial transit time oscillator is connected with the pulse power source, and the other end is connected with the radiation system. The invention can achieve the following technical effects: the microwave source still has higher power efficiency in a low guide magnetic field, and has the potential of adopting permanent magnet packaging. 本发明涉及高功率技术领域的微波源器件，尤其是一种引入聚焦阴极的低磁场Ka波段同轴渡越时间振荡器，属于高功率微波技术领域，包括阴极座、阴极内屏蔽环、阴极外屏蔽环、阴极、内导体、外导体，整个结构关于中心轴线OO'旋转对称。所述同轴渡越时间振荡器一端连接脉冲功率源，另一端连接辐射系统；采用