High-efficiency and low-magnetic field dual-mode working relativistic return wave tube

Abstract

In order to solve the technical problem of low conversion efficiency of the existing low-magnetic field dual-mode working relativistic return wave tube due to both beam interaction and mode control, the invention provides a high-efficiency low-magnetic field dual-mode working relativistic return wave tube, comprising: annular cathode, magnetic field coil, cathode reflection ring, dual pre-modulation cavities sequentially arranged at the rear end of annular cathode, dual-segment non-uniform slow wave structure and output waveguide; inner radius R of the cathode reflection ring 0 to TM 01 Modulo cutoff, and satisfy R 0 <0.382c / f; the cathode reflection ring is placed in the annular cathode, and the distance L from the end of the annular cathode 0 satisfy λ g1 / 2<L 0 <λ g2 , λ g1 and λ g2 TM respectively 01 Die and TM 02 The guided wave wavelength of the mode; the double pre-modulation cavity includes two modulation cavity units with unequal radii, whose outer radii are R respectively 1 and R 2 , the inner radius is r 1 and r 2 , and satisfy 1.25λ<R 2 <R 1 <1.4λ, 1.15λ≤r 1 ,r 2 ≤1.25λ, λ is the microwave wavelength; the two-segment non-uniform slow-wave structure consists of 8-10 slow-wave units, and the outer and inner radii are R respectively sn and r sn , and satisfy: 1.3λ≤R sn ≤1.4λ,1.15λ≤r sn ≤1.3λ.

Description

technical field [0001] The invention belongs to the technical field of high-power microwaves, in particular to a relativistic return wave tube for high-efficiency and low-magnetic field dual-mode working. Background technique [0002] The relativistic return wave tube has the characteristics of high output microwave power and conversion efficiency, stable and reliable, and suitable for repetition frequency operation. It is one of the most potential high-power microwave devices at present. In view of the urgent need for light and miniaturization of high-power microwave generating devices, research on relativistic return-wave tubes with low magnetic fields (that is, the applied magnetic field is lower than the cyclotron resonance magnetic field) is being vigorously carried out at home and abroad. [0003] An existing low-magnetic field dual-mode working relativistic return wave tube is shown in the attached figure 1 shown (Two-waveCherenkovoscillator with moderately oversized...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem of low conversion efficiency of the existing low magnetic field dual-mode working relativistic return wave tube due to the consideration of beam interaction and mode control, the invention provides a high-efficiency low magnetic field dual-mode working relativistic return wave tube

Images