Non-introducing magnetic field compact high-power microwave device

Abstract

The invention discloses a non-introducing magnetic field compact high-power microwave device, which comprises an anode, a cathode, a coaxial inner conductor, a coupling plate, and four annular metal grid meshes, wherein the anode is provided with an accommodating cavity; the cathode is connected with the anode via an insulator and is located in the accommodating cavity; the coaxial inner conductor is connected with the anode and is located in the accommodating cavity, and the coaxial inner conductor and the accommodating cavity form a coaxial structure; the coupling plate is connected onto the end surface of the coaxial inner conductor; the four annular metal grid meshes have the same circle center but different semidiameters; the metal grid meshes are fixedly connected onto a grid mesh supporting area and the coaxial inner conductor; and the four annular metal grid meshes, the coupling plate, and the coaxial inner conductor form a resonant cavity. An electron beam emission mode is changed into a radial direction, the metal grid meshes are used for separating the cavity; as the electron beam is radially emitted, the electron beam has a large cross section, and a higher beam current strength can be transmitted in a low current density condition; and due to the radial structure, the space charge effects are small, the current limit current is large, input of large beam current can be allowed, and virtual cathode effects are not generated.

Description

technical field [0001] The invention relates to the technical field of high-power microwave devices, in particular to a compact high-power microwave device without a guiding magnetic field. Background technique [0002] The research on unguided magnetic field devices is gradually developing in the direction of high power and high efficiency. In the 1990s, BarryM.Marder proposed a split-cavity oscillator based on the transit time effect, which could modulate a high-current relativistic electron beam within a short distance without an external magnetic field. Since the current must axially pass through the metal mesh of the separation cavity and the formation of virtual cathodes must be prevented, the current density should not be too large, so this device is a high-resistance device, which affects its output microwave power to a certain extent. Contents of the invention [0003] As a result of various extensive and meticulous studies and experiments, the inventors of the p...

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Problems solved by technology

Since the current must axially pass through the metal mesh of the separation cavity and the formation of virtual cathodes must be prevented, th

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