The invention provides a field emission thruster based on microwave enhancement. The thruster comprises an extraction electrode, an emitting electrode needle tube and a base plate. The emitting electrode needle tube penetrates through and is fixed to the center of the base plate and is located above the base plate. The extraction electrode is located above the emitting electrode needle tube. The field emission thruster further comprises a sleeve, a resonant cavity shell, a microwave feed-in cable and an SMA microwave input interface. The extraction electrode, the resonant cavity shell and thebase plate are sequentially covered from top to bottom to form a cylindrical cavity. The emitting electrode needle tube is located at the axis of the resonant cavity shell. The sleeve sleeves the emitting electrode needle tube, the microwave feed-in cable enters the resonant cavity shell through the SMA microwave input interface and is connected with the lower end of the sleeve, the height of theportion, inside the resonant cavity shell is one fourth of the wavelength of feed-in microwave, and the inner diameter of the resonant cavity shell is smaller than a half of the wavelength of the feed-in microwave. The field emission voltage of the colloid thruster is greatly lowered. Meanwhile, high specific impulse can be realized.
本发明提供一种基于微波增强的场致发射推力器,包括:抽取极、发射极针管和底板,发射极针管穿透并固定在底板中心且位于底板上方,抽取极位于发射极针管上方,场致发射推力器还包括:套管、谐振腔外壳、微波馈入电缆和SMA微波输入接口,抽取极、谐振腔外壳和底板由上至下依次盖合形成圆柱形腔体,发射极针管位于谐振腔外壳轴心,套管套于发射极针管外,微波馈入电缆通过SMA微波输入接口进入谐振腔外壳内,并与套管的下端连接,谐振腔外壳内高为馈入微波的波长的四分之一,谐振腔外壳的内径小于馈入微波的波长的二分之一。本发明大大降低了胶体推力器的场致发射电压;同时,能够实现较高的比冲。
Field emission thruster based on microwave enhancement
一种基于微波增强的场致发射推力器
2020-07-28
Patent
Electronic Resource
Chinese
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