Frequency feature of S-band tapered magnetically insulated transmission line oscillator

Frequency feature of an S-band tapered magnetically insulated transmission line oscillator with slowly tapered vanes and sharply tapered vanes is analyzed. Comparing the frequency hopping phenomena in the experiments and cavity characteristics analysis for this device shows that the hopped frequency is also π moded and its distribution is different from the stable π mode. Experiments by adjusting the period of the sharply tapered vanes have proved the analysis result. Further research indicates that matching driving pulse power source, perfect vacuum and proper diode position ensure stable operation of the tapered MILO.