A Single-sided Folded Waveguide Slow-Wave Structure for Flyback Wave Oscillators

A technology of folded waveguide and slow wave structure, which is applied in the direction of the circuit components of the time-of-flight electron tube, which can solve the problems of low coupling impedance and achieve the effect of high working voltage

CN104576266BActive Publication Date: 2018-04-10NO 12 RES INST OF CETC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-04-10

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Abstract

The invention discloses a one-side folded waveguide slow wave structure for a backward wave oscillator. Curved waveguides on one side of a folded waveguide are arranged in symmetrical positions along a midline. The one-side folded waveguide slow wave structure particularly structurally comprises a straight waveguide array consisting of a plurality of straight waveguides and a plurality of curved waveguides, wherein every two adjacent straight waveguides are connected via one curved waveguide to form a periodic structure; and an electron beam channel penetrates through the straight waveguide array. According to the one-side folded waveguide slow wave structure, the curved waveguides on one side are transferred to the symmetric positions along the midline, so that fundamental waves of the slow wave structure are forward waves; and the backward wave oscillator can achieve appropriate working voltage and higher coupling impedance simultaneously by using the one-side folded waveguide slow wave structure.
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Description

technical field

[0001] The invention relates to the field of microwave vacuum electronic devices, in particular to a single-side folded waveguide slow-wave structure used for a return-wave oscillator. Background technique

[0002] The return wave oscillator is a microwave vacuum electronic device, which uses the interaction between the return wave on the slow wave structure and the electron beam to generate microwave oscillations, and can realize electronic tuning in a wide frequency band. For terahertz science and technology and related applications, the return wave oscillator is a kind of radiation source with a high degree of practicality. As the operating frequency of microwave vacuum electronic devices increases to short millimeter waves (40GHz-300GHz) or even terahertz (300GHz-3000GHz), folded waveguides have become the most commonly used slow-wave structures, such as figure 1 As shown, the U-shaped curved folded waveguide slow wave structure is a periodic structure i...

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] In order to overcome the low coupling impedance problem of the folded waveguide slow-wave structure in the prior art in the return wave oscillator, the present invention transfers the curved waveguide on one side to the symmetrical position of the center line without increasing the process precision and complexity. method, retaining the all-metal structure of the folded waveguide slow-wave structure, good dispersion characteristics, simple coupling matching, and compatibility with micromachining processes, etc., and improving the power level of short millimeter wave and terahertz return wave oscillators. The present invention proposes a A single-sided folded waveguide slow-wave structur...