A High-Order Back-Wave Oscillation Suppression Structure for Ribbon-Traveling-Wave Tubes

Abstract

The invention discloses a high-order return wave oscillation suppression structure for a strip-shaped injection traveling wave tube, which belongs to the field of microwave electronics and terahertz technology. The structure includes a housing, rectangular grids arranged staggeredly on the upper and lower surfaces of the inner cavity of the housing, and a row of rectangular coupling waveguides with the same size and arranged periodically are respectively arranged on both sides of the housing, and the two rows of rectangular coupling waveguides are arranged along the axis The direction is misplaced by half of the slow wave cycle, and the design is also misplaced in the longitudinal direction, so that a rectangular coupling waveguide corresponds to a rectangular cavity. In the present invention, by loading interlaced rectangular coupling waveguides on both sides of the slow-wave structure, the suppression and absorption of high-order modes are realized synchronously under the premise of not affecting or destroying the working mode.

Description

technical field [0001] The invention relates to the field of microwave electronics and terahertz technology, in particular to a high-order return wave oscillation suppression structure for a strip-shaped injection traveling wave tube Background technique [0002] In the fields of military confrontation, spaceborne or airborne communication, radar, etc., electric vacuum devices are considered to be the most practical and reliable solution. This is due to the unique characteristics of high power, high efficiency and high gain of electric vacuum devices. Among them, the traveling wave tube, as a kind of electric vacuum device, is especially suitable for electronic countermeasures, space-borne and vehicle-mounted communications because of its broadband and miniaturization characteristics unmatched by other devices. The latest research hotspot—ribbon beam traveling wave tube has larger current and power capacity than traditional cylindrical electron beam. Therefore, countries a...

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Problems solved by technology

However, the two schemes will inevitably weaken the working mode while absorbing the oscillation mode, resulting in a substantial decrease in the gain of the whole tube. In order to obtain sufficient gain, the number of cycles must be increased, which in turn leads to an increase in the size of the slow-wave structure and The difficulty of electronic transmission system design increases, which is not conducive to the development of miniaturization and millimeter wave devices

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