Experimental research on a novel C-band compact transit-time oscillator with low guiding magnetic field

Abstract

Compactness and miniaturization are important development directions of high-power microwave sources at present. In the previous simulation research, we proposed a compact C-band transit-time oscillator with a low external guiding magnetic field. In order to verify whether the device can be better applied to practice, we have carried out experimental research on the device. With a diode voltage of 570 kV, current of 11.5 kA, and external guiding magnetic field of 0.35 T, the output microwave pulse of 1.3 GW is obtained at 4.3 GHz. The power conversion efficiency is about 20%. By observing the fluorescent screen imaging and the far-field pattern in the experiment, it can be seen that the working mode of the device is relatively stable. The experimental results show that the device has the ability to output GW-level C-band high-power microwave under a low external guiding magnetic field.