Broadband multi-waveguide output device for rotary traveling wave tube

Abstract

The invention belongs to a broadband multi-waveguide output device for a rotary traveling wave tube. The broadband multi-waveguide output device comprises a circular waveguide, long stripped rectangular waveguides and rectangular coupling holes, wherein the circular waveguide is provided with an input opening and an output opening, the long stripped rectangular waveguides are arranged on a circular waveguide casing at intervals in the axial direction and are provided with microwave output openings, the rectangular coupling holes are arranged between the circular waveguide and the rectangular waveguides, the axial lengths of all holes are identical, the center distances among all holes are identical, the widths of four front holes at two ends of each group of rectangular holes are in step-type arrangement from narrow to wide, the width of each hole in the middle is the same as the width of the fourth hole at the two ends, and in addition, an inclined coupling surface is also arranged at the junction part of each rectangular waveguide inner cavity front end surface and the circular waveguide. The multi-waveguide output device has the characteristics that the requirements of the millimeter band of high power, high gain and high frequency band for being matched with the rotary traveling wave tube to be used can be sufficiently met, the base parameters are provided for the optimization design of voltage reduction collection electrodes, and the like. The defects of narrow band width, matching use difficulty with the broadband rotary traveling wave tube, and the like in the prior art are overcome.

Description

technical field [0001] The invention relates to a microwave output device in a vacuum component, in particular to a broadband multi-waveguide output device for a cyclotron traveling wave tube with broadband lateral output. Background technique [0002] Traditional microwave tubes such as magnetrons, traveling wave tubes, and return wave tubes will encounter serious difficulties when extending to the millimeter wave band, and the power output will drop sharply. Therefore, seeking millimeter-wave and submillimeter-wave devices based on new principles has always been the goal of people's efforts, resulting in a series of new devices that are different from traditional microwave tubes, such as gyrotrons. Because the gyrotron traveling wave tube in the gyrotron has excellent performance of high power, high gain and wide frequency band in the millimeter wave band, it has been developed rapidly. [0003] In order to improve the output power and bandwidth of the gyro TWT, a series ...

AI Technical Summary

Problems solved by technology

However, the current quasi-optical output device has a relatively narrow bandwidth, which is only suitable for a cyclotron oscillator working at a single frequency point, but not for a broadband cyclotron traveling wave tube.

The horizontal output device disclosed in the patent document with the publication number CN101562268A and the title of invention "A Multi-Waveguide Output Structure for Convoluted Amplifier" includes an inner cylindrical cavity and an outer circular ring with a coaxial center. Cavity, the inner and outer cavities are separated by an annular common wall to form a compound cavity, and a plurality of rectangular coupling holes are arranged at annular intervals on the common wall, and the housing of the outer ring cavity facing the coupling holes is also separately An output waveguide is provided, and two small and large cylindrical waveguides are respectively arranged on the upper and lower end faces of the inner cylindrical cavity around the axis; The resonance between the outer ring cavities couples the electromagnetic wave from the axial transmission direction to the transverse waveguide to avoid the re-acceleration of the electron beam by the electromagnetic wave, but due to the limitation of its resonance structure, the bandwidth of this coupling method is very narrow , so it cannot be used in conjunction with the broadband gyrotraveling wave tube

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