Microwave coaxial resonant tangential field thruster

Abstract

The invention provides a microwave coaxial resonant tangent field thruster, which includes a ceramic channel formed by a ceramic tube, a metal resonant cavity, a resonant cavity reflective bottom plate, a waveguide metal tube, an anode, a microwave antenna, an insulating ceramic and a ring-shaped permanent magnet, The bottom end of the ceramic tube protrudes from the thruster shell and extends into the metal resonant cavity through the opening on the top of the metal resonant cavity. The reflective bottom plate of the resonant cavity is fixed on the bottom of the metal resonant cavity, and the waveguide metal tube is arranged inside the metal resonant cavity. Sleeved on the outer surface of the ceramic tube, one end of the waveguide metal tube is fixed at the center of the resonant cavity reflection bottom plate, the resonant cavity reflection bottom plate is the short-circuit end of the metal resonator cavity, and the opening on the top of the metal resonator cavity is the opening of the metal resonator cavity. At the open end, the metal resonant cavity is fixedly connected to the thruster shell through the connecting bottom plate. The invention enhances the ionization effect in the channel of the thruster by means of microwave coaxial resonance, has high efficiency, and has low sensitivity to the distribution of magnetic field intensity.

Description

technical field [0001] The invention belongs to the field of electric thrusters, in particular to a microwave coaxial resonant tangential field thruster. Background technique [0002] With the development of space technology, electric thrusters are gradually beginning to replace traditional chemical thrusters and become the preferred choice for space missions due to their high specific impulse, high efficiency, and long life. Due to the proposal of high-precision measurement space missions and the rapid development of micro-satellites, micro-propulsion technology has gradually become a hot spot in electric propulsion technology in recent years. [0003] The tangential field thruster is a relatively new concept of electric propulsion. It has become a better choice for the miniaturization of the thruster due to its characteristics of low complexity, high thrust density, long life, and wide range of adjustment. The principle is that the electrons emitted by the cathode are cap...

AI Technical Summary

Problems solved by technology

However, in the miniaturization of the thruster, the insufficient ionization rate and the decrease in overall efficiency have gradually become the bottleneck of its performance improvement.

[0004] Because microwave energy is easy to form a strong electric field in a small scale range, so as to achieve low flux density and small scale ionization, pre-ionization of the thruster working fluid by microwave injection is an effective way to enhance the ionization degree of the working fluid. However, in the field of electric propulsion, microwave ionization is usually achieved by microwave electron cyclotron resonance under magnetic field confinement. This method has low efficiency and is sensitive to the distribution of magnetic field strength.

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