A compact wideband high power microwave source based on oil-filled switched oscillator
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摘要: 紧凑宽带高功率微波源研制过程中，为了提高工作电压，开关振荡器采用变压器油作为绝缘介质。研制了一种具有较小几何尺寸和前向辐射方向图的组合振子天线作为辐射天线。在设计阶段，采用电磁仿真软件对开关振荡器和辐射天线的性能进行了仿真和预测。然后，对该宽带高功率微波源进行了实验研究，并对辐射场进行了测量。结果表明：开关振荡器的工作电压超过300 kV，辐射场rE值(距离和辐射电场峰值的乘积)达到125 kV；辐射场中心振荡频率为375 MHz，3 dB带宽为24%。Abstract: This paper presents a compact wideband high power microwave source developed on the basis of a switched oscillator. To improve the operating voltage of the switched oscillator, it was filled with transformer oil for insulation. Furthermore, an electric-magnetic combined dipole antenna with relatively small physical dimensions and forward radiation pattern was employed as the radiating antenna. In the design stage, the performance of the switched oscillator and the radiating antenna was predicted by electromagnetic simulation. Then this wideband high power microwave source was tested in experiments and the radiated electric field was measured. As a result, the operating voltage of the switched oscillator exceeded 300 kV, while the radiation factor reached up to 125 kV and the central oscillating frequency was 375 MHz with a 3 dB bandwidth of 24%.
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