Ribbon electron beam traveling wave tube output structure

Abstract

The invention provides an output structure of a strip-shaped electron beam traveling wave tube, the output structure includes a double rectangular waveguide coupling structure, an arc-shaped curved waveguide, a single diagonal wedge dielectric matching load, and a linear gradient section, wherein the double rectangular waveguide coupling structure includes The upper waveguide and the lower waveguide; the upper waveguide is an electromagnetic wave channel, and the two ends of the electromagnetic wave channel are the electromagnetic wave output port and the matching load port; A rectangular coupling slot is set between the channel and the electron beam channel, the arc-shaped curved waveguide is connected to the electromagnetic wave output port, the single-slope dielectric matching load is set at the matching load port, and the linear gradient section is connected to the electron beam output port port. The structure can effectively realize beam separation, provide a wider electron beam channel, isolate the high-frequency interaction area and the collector area, and have better transmission coefficients in a wider frequency band.

Description

technical field [0001] The invention belongs to the field of microwave vacuum devices, and relates to an output structure for high-power microwave vacuum devices, in particular to an ultra-wideband output structure of a strip-shaped electron beam traveling wave tube. Background technique [0002] The ribbon beam microwave vacuum device is a device that converts the kinetic energy of electrons carried by the ribbon beam into microwave energy through the movement of electrons in vacuum. The electron gun produces a beam of electrons in the ribbon beam, and the electron beam moves towards the high-frequency structure under the constraint of the voltage between the anode and the cathode and the applied magnetic field. The electron beam interacts with the high-frequency field in the high-frequency structure, converting the energy of the electrons into high-frequency energy. In order to realize the beam interaction process, it is necessary to couple the high-frequency input signal...

AI Technical Summary

Problems solved by technology

However, since the size of the ridge waveguide is usually fixed, the electron beam will inevitably diverge during the transmission process and hit the waveguide wall, destroying the output structure and affecting the performance and life of the tube; and in order to increase the flow rate of electrons, The size of the ridge waveguide should not be too small, which will cause part of the electromagnetic wave to enter the collector region, which will affect the performance and stability of the device; at the same time, although the curved waveguide can guide the electromagnetic wave to separate from the electron beam, but because it is connected with If the ridge waveguide is connected, there will still be a certain number of electrons entering it with the electromagnetic wave due to the same partial velocity as the direction of the curved waveguide, thus bombarding the window, resulting in loss of the window; in addition, because the working bandwidth of the ridge waveguide connection structure is very limited , resulting in the working bandwidth of the whole pipe is also limited, generally only 30% of the relative bandwidth

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