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把虚阴极振荡激励微波的过程看成是一个时空振荡电流元激励微波的过程,在薄电荷层近似下,求得空心束虚阴极激励微波的主模式关系,并讨论了束几何位形与微波输出功率之间的关系。我们所确定的主模式与实验和粒子模拟的结果相符。
The process of virtual cathode oscillation to excite microwaves is regarded as a time-space oscillating current element to excite the microwaves. Under the thin charge-layer approximation, the main mode relationship of the hollow-beam virtual cathode excitation microwaves is obtained, and the relationship between the beam geometry and the microwave The relationship between output power. The main mode we have determined is consistent with the experimental and particle simulation results.