Dual-wave-band relativistic klystron amplifier

Abstract

The invention provides a technical scheme of a dual-wave-band relativistic klystron amplifier. According to the technical scheme, a drift tube, an input cavity, a first intermediate cavity, a second intermediate cavity and an output cavity are provided. The input cavity is arranged on the side wall, close to a cathode, of the drift tube. The output cavity is arranged on the one, far away from the cathode, of the drift tube. The first intermediate cavity is arranged on the drift tube between the output cavity and the input cavity. The second intermediate cavity is arranged on the drift tube between the first intermediate cavity and the output cavity. According to the scheme, the multi-gap input cavity of a coaxial signal feed-in structure is employed, the two intermediate cavities which are respectively resonant with a low wave band and a high wave band are adopted, the output cavity adopts an output transition section adjustable in distance, so that the input cavity is enabled to work on two frequency points, a beam is highly modulated on required output microwave frequency points, and the output cavity is enabled to work on frequency points of output microwaves of the two wave bands.

Description

technical field [0001] The invention relates to the field of microwave electronic devices, in particular to a dual-band relativistic klystron amplifier. Background technique [0002] With the development of high-power microwave, the high-power microwave source capable of generating two frequencies has become a new development direction of high-power microwave technology, and there are related reports at home and abroad. The dual-band microwave sources developed at home and abroad are relativistic return wave oscillators and magnetic insulated wire oscillators. For example, the dual-frequency relativistic return wave oscillators developed by Ginzburg N S and others at the Institute of Applied Physics of the Russian Academy of Sciences in 2003 were simulated to obtain a power of 1MW and an efficiency of 1MW. 10%, dual-frequency microwave output with frequencies of 8.8GHz and 10.3GHz respectively (The 4th IEEE International Conference on Vacuum Electronics.2003:181~182.); the d...

AI Technical Summary

Problems solved by technology

In order to obtain a higher modulation current intensity, the resonant frequency of the intermediate cavity is usually slightly higher than the operating frequency and resonates in the same band. The fundamental wave component of the beam generally reaches more than 85%. The modulated beam after passing through the traditional intermediate cavity The interwave conversion efficiency of the fundamental wave component is high, while the double frequency component of the modulated beam is about 40%, so the interwave conversion efficiency of the double frequency component is low

[0006] In the traditional RKA, in order to ensure high output microwave power and a single spectrum, a fixed-size single-gap re-entry nose cone output cavity is often used, resulting in the output cavity can only work in one band

Images