Compact real-time frequency-variable relativistic magnetron

By employing a reentrant coupling cavity and a full-cavity extraction structure in an L-band relativistic magnetron, combined with a vacuum tuning mechanism, real-time frequency agility and compact design under high vacuum conditions are achieved, solving the problems of compactness and real-time frequency agility in existing technologies, and improving working efficiency and frequency tuning range.

CN120033045BActive Publication Date: 2025-11-04UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Application Number
CN202510085373.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2025-11-04
Estimated Expiration
2045-01-20

AI Technical Summary

Technical Problem

Existing L-band relativistic magnetron designs cannot achieve compactness, lightweight design, and real-time frequency agility. Furthermore, conventional designs require disrupting the high vacuum state to achieve frequency agility, which affects operating efficiency.

Method used

The design employs a reentrant coupling cavity structure and a full cavity extraction structure, combined with a vacuum tuning mechanism. Frequency tuning is achieved by adjusting the axial length of the coupling seam and the fan-shaped waveguide cavity under high vacuum conditions through a tuning slider and a tuning rod. Titanium alloy material is used in the design to reduce weight.

Benefits of technology

It achieves real-time frequency agility under high vacuum conditions, reduces the radial size and weight of the device, improves operating efficiency, has a frequency tuning range of 1.86GHz to 2.44GHz, and has a power output of more than 100MW.

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Abstract

The application discloses a compact real-time frequency-agile relativistic magnetron, and belongs to the technical field of high-power microwave sources. The device comprises an input structure, an end space structure, an anode cavity structure, a full-cavity extraction output structure arranged in sequence along an axial direction, a cathode coaxially arranged in the anode, and a vacuum tuning mechanism. The vacuum tuning mechanism comprises a tuning slider, a tuning rod and a sealing assembly. The application designs the vacuum tuning mechanism, moves the tuning slider through the tuning rod, adjusts the axial length of the coupling slit and the sector waveguide cavity, changes the resonant frequency of the resonant cavity, and finally realizes real-time frequency-agile of the device in a high-vacuum state. In addition, the compactness of the device is realized by adopting a reentrant coupling cavity structure and a full-cavity extraction structure.
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Citation Information

Patent Citations

  • Relativistic magnetron for realizing frequency hopping operation by utilizing transparent negative electrode

    CN105428191A

  • An axially tunable relativistic magnetron

    CN109148244A