【摘要】：微波電子學(xué)自誕生以來一直受到追捧,經(jīng)過百余年的發(fā)展,目前已經(jīng)建立起了完善理論體系,微波電真空器件也成了現(xiàn)代通信系統(tǒng)的核心。電子槍作為微波電真空器件的重要組成部分,它的設(shè)計對整管的效率有著至關(guān)重要的作用。隨著技術(shù)的不斷發(fā)展,由最早的皮爾斯電子槍為起點,各類電子槍層出不窮,新型電子槍的出現(xiàn)使得微波管能夠滿足高頻率,高功率,高效率,高增益,小型化,響應(yīng)時間迅速等要求。柵控電子槍和帶狀注電子槍應(yīng)運而生,作為研究熱點,其設(shè)計工作也顯得有意義,但是對柵控電子槍和帶狀注電子槍設(shè)計的研究仍需要完善。本文主要對柵控電子槍以及帶狀注電子槍的設(shè)計進行研究。對柵控電子槍的結(jié)構(gòu)變化對性能的影響進行了分析。對無柵電子槍,分析了聚焦極和陽極的結(jié)構(gòu)變換,采用與無柵模型結(jié)構(gòu)進行對比,得出加?xùn)胖箅娮訕屝阅軐劢箻O和陽極結(jié)構(gòu)變化敏感程度的變化。重點研究柵控電子槍特有的柵網(wǎng)結(jié)構(gòu),主要分析了柵網(wǎng)位置以及柵厚度柵寬度與柵絲設(shè)置對柵控電子槍性能的影響。從研究結(jié)果得出柵控電子槍對柵網(wǎng)位置最為敏感,加?xùn)胖髮劢箻O和陽極結(jié)構(gòu)的變化對電子槍性能的影響程度減弱,相比之下陽極結(jié)構(gòu)的敏感程度略高,外層?xùn)沤z影響程度高于內(nèi)層?xùn)沤z,且柵絲層數(shù)越少,射程也越大。本文根據(jù)敏感性分析得出的結(jié)論,總結(jié)出設(shè)計和優(yōu)化柵控電子槍的方法,并予以實例來說明。本文對帶狀注電子槍的分析主要研究帶狀電子注的形成,聚焦以及傳輸問題。文中采用橢圓形發(fā)射面生成帶狀電子注,利用wiggler磁場來對產(chǎn)生出的帶狀電子注進行聚焦,重點研究帶凹槽結(jié)構(gòu)的wiggler磁場對帶狀電子注的聚焦影響。對比了帶凹槽與不帶凹槽wiggler磁場結(jié)構(gòu)對帶狀電子注聚焦性能的影響,并分析了不同尺寸結(jié)構(gòu)的凹槽的中心磁場值,得出設(shè)計凹槽合理尺寸的方法。本文還提出階梯凹槽創(chuàng)新性結(jié)構(gòu),分析階梯凹槽對帶狀電子注的聚焦與傳輸性能,結(jié)果顯示階梯凹槽相比均勻凹槽能夠?qū)铍娮幼⑦M行再聚焦,延長傳輸距離。文中最后建立了柵控帶狀注電子槍模型并進行仿真,研究發(fā)現(xiàn)加?xùn)胖蟮膸铍娮幼⒃谡矫娴牟▌邮艿胶艽笥绊?注半徑明顯增大。在對磁場結(jié)構(gòu)進行簡單優(yōu)化之后,使得窄平面內(nèi)的電子軌跡包絡(luò)得到改善。
[Abstract]:Microwave electronics has been sought after since its birth. After more than 100 years' development, a perfect theoretical system has been established, and microwave and electric vacuum devices have become the core of modern communication system. As an important part of microwave vacuum devices, the design of electron gun plays an important role in the efficiency of the whole tube. With the continuous development of technology, from the earliest Pierce electron gun as the starting point, various kinds of electron gun emerge in endlessly, the appearance of new electron gun makes microwave tube can satisfy high frequency, high power, high efficiency, high gain, miniaturization. Quick response time, etc. Grid electron gun and ribbon electron gun emerge as the times require, as a research hotspot, its design work also appears to be meaningful, but the design of grid controlled electron gun and band electron gun still need to be improved. In this paper, the design of the grid-controlled electron gun and the belt beam electron gun are studied. The influence of the structure change of the gate controlled electron gun on the performance is analyzed. The structure transformation of the focusing pole and anode is analyzed and compared with the structure of the non-grid model. The sensitivity of the electron gun performance to the change of the focusing electrode and anode structure after the addition of the grid is obtained. The special grid structure of the gate-controlled electron gun is mainly studied, and the influence of the grid position, the grid thickness and the grid wire setting on the performance of the gate-controlled electron gun is analyzed. The results show that the gate-controlled electron gun is most sensitive to the grid position, and the influence of the change of the focusing pole and anode structure on the performance of the gun is weakened after adding the grid, and the sensitivity of the anode structure is slightly higher than that of the anode structure. The influence degree of the outer grating wire is higher than that of the inner gate wire, and the smaller the number of the gate wire layer, the greater the range. Based on the conclusions of sensitivity analysis, this paper summarizes the method of designing and optimizing the gate controlled electron gun, and gives an example to illustrate it. In this paper, the formation, focusing and transmission of banded electron beam are studied. In this paper, the elliptical emission surface is used to generate the band electron beam, and the wiggler magnetic field is used to focus the band electron beam. The effect of the wiggler magnetic field with groove structure on the band electron beam is studied. The effects of wiggler magnetic field structure with and without grooves on the focusing properties of strip electron beam are compared. The central magnetic field values of grooves with different sizes are analyzed, and the method to design the reasonable size of grooves is obtained. The innovative structure of the ladder groove is also proposed. The focusing and transmission performance of the ladder groove to the band electron beam is analyzed. The results show that the ladder groove can refocus the band electron beam and prolong the transmission distance compared with the uniform groove. Finally, a grid-controlled beam gun model is established and simulated. It is found that the fluctuation of the band beam in the narrow plane is greatly affected and the beam radius is obviously increased. After simple optimization of magnetic field structure, the envelope of electron trajectory in narrow plane is improved.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN105

【參考文獻】

相關(guān)碩士學(xué)位論文 前1條

1 丁雪進;行波管諧波注入技術(shù)研究[D];電子科技大學(xué);2009年

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本文編號：2333020