Radial three-cavity transit time oscillator with double output ports and microwave generation method

Abstract

The invention relates to a radial three-cavity transit time oscillator with double output ports and a microwave generation method, and aims to solve the technical problems that the wall thickness of each metal cylinder of an existing radial three-cavity transit time oscillator is equal, and the output power and the beam wave conversion efficiency of the microwave generation device are low due to a single extraction gap and a single output port structure. The oscillator comprises a focusing cathode arranged on a central shaft and a transition cavity enclosed by a good conductor material, wherein the focusing cathode is used for emitting a relativistic electron beam to the transition cavity along the radial direction; an anode foil, a first transition cavity, a second transition cavity and a third transition cavity are sequentially arranged in the transmission direction of the relativistic electron beam; and in the axial direction, one side of the third transition cavity is sequentially provided with a first extraction gap, a first output waveguide and a first output port, and the other side of the third transition cavity is sequentially provided with a second extraction gap, a second output waveguide and a second output port. The invention further provides a microwave generation method based on the radial three-cavity transit time oscillator with the double output ports.

Description

technical field [0001] The invention relates to a high-power microwave generating device, in particular to a radial three-cavity transit time oscillator with double output ports and a microwave generating method. Background technique [0002] In response to the urgent need for light and miniaturized high-power microwave generators, research on high-power microwave generators without magnetic field is being vigorously carried out at home and abroad. The biggest problem of high power microwave generator without magnetic field is the low beam conversion efficiency. Typical devices such as virtual cathode oscillators, magnetic insulated wire oscillators, etc., have an efficiency of no more than 20%. For radial devices based on transit radiation, the electron beam is emitted radially outward, the beam area on the transmission channel increases, the beam current density decreases, and the space charge effect is weakened, which is beneficial to work without a magnetic field. A di...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing radial three-cavity transit time oscillator has equal wall thickness of each metal cylinder, and the output power and beam conversion efficiency of the microwave generating device are low due to the single extraction gap and single output port structure. To solve the technical problems, a radial three-cavity transit-time oscillator with dual output ports and a microwave generation method are proposed

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