短毫米波带状注器件电子枪的设计
发布时间：2019-03-13 16:23
【摘要】：随着军事科技的发展以及民用需求的不断更新,对真空电子器件提出了更高的要求。频率更高、功率更大、频带更宽和器件的小型化等要求对传统真空电子器件带来了新的挑战,带状注由于其空间电荷力较小,理论上可以无限增大其宽边使得它可以传输的电流更大。因而带状注对比于传统的圆形注更适合于产生高频率大功率的辐射。且带状注的慢波结构可采用更利于加工的平板式。带状注真空电子器件的发展将会推动真空电子器件的前进,因而本文对带状注电子枪进行了初步的研究,主要的工作如下:1.根据教研室项目对于W波段行波管的参数要求设计了一支工作在W波段的单阳极带状注行波管电子枪,阳极工作电压为21.1kV时,可获得400mA稳定电流,此时阴极发射面电流密度为28.78A/cm2,注腰处截面电流密度约133A/cm2。并且电子枪射程约10mm,横纵比为10:3,注腰截面尺寸小于1mm×0.3mm,并对阳极电压改变以及阴阳极距离的变化对于电子枪性能的影响进行了进一步研究。2.根据教研室项目对于140GHz返波管的参数要求设计了一支工作在140GHz的双阳极带状注返波管电子枪,第一阳级电压15kV,第二阳极电压工作范围15kV-18kV,可获得稳定电流42mA左右,此时阴极发射面电流密度约为14.4A/cm2。电子枪射程大于11mm,横纵比为10:1,注腰处截面尺寸小于1mm×0.1mm,并对第一阳极电压改变以及阴阳极距离的变化对于电子枪性能的影响进行了进一步研究。3.根据教研室项目对于220GHz返波管的参数要求设计了一支工作在220GHz的双阳极带状注返波管电子枪,第一阳级电压10kV,第二阳极电压工作范围8kV-12kV,可获得稳定电流18.4mA左右,阴极发射面电流密度约为7.5A/cm2,注腰处截面电流密度约116A/cm2。电子枪射程大于7mm,横纵比20:3,注腰截面面积尺寸小于400μm×60μm,在140GHz双阳极带状注电子枪的研究基础上,对其进行进一步研究,探讨了阴极结构改变以及阳极通道的变化对于电子枪性能的影响。基于器件的实际需求,本文对单阳极与双阳极电子枪进行了设计,均达到参数指标要求。对于研究带状注器件具有重要的参考价值。
[Abstract]:With the development of military science and technology and the continuous renewal of civilian demand, higher requirements for vacuum electronic devices have been put forward. Higher frequency, larger power, wider band and miniaturization of devices bring new challenges to traditional vacuum electronic devices. Theoretically, it can increase its wide edge infinitely so that it can transmit more current. Therefore, the ribbon beam is more suitable to produce high frequency and high power radiation than the traditional circular beam. And the slow wave structure of the belt injection can adopt the flat plate which is more convenient to process. The development of strip injection vacuum electronic devices will promote the advancement of vacuum electron devices. Therefore, this paper makes a preliminary study on the ribbon electron injection gun, the main work of which is as follows: 1. According to the parameter requirement of W-band traveling wave tube, a single anode ribbon beam traveling wave tube electron gun working in W-band is designed. When the anode working voltage is 21.1kV, the stable current of 400mA can be obtained. At this point, the current density of cathode emissive surface is 28.78A 路cm ~ 2, and the cross-section current density of the injection waist is about 133A 路cm ~ (- 2). And the range of electron gun is about 10 mm, the ratio of aspect to aspect is 10? 3, the cross section size of injection waist is smaller than 1mm 脳 0.3 mm, and the influence of the change of anode voltage and the distance between cathode and anode on the performance of electron gun is further studied. 2. According to the parameter requirement of 140GHz backwave tube in the teaching and research department project, a double anode ribbon injection backwave tube electron gun working in 140GHz is designed. The first anode voltage is 15kV, the second anode voltage is 15kV / 18kV, and the steady current 42mA can be obtained. At this point, the current density of cathode emissive surface is about 14.4A 路cm ~ (- 2). The range of electron gun is greater than 11 mm, the aspect ratio is 10? 1, and the cross section size of the injection waist is less than 1mm 脳 0.1 mm. The influence of the change of the first anode voltage and the distance between cathode and anode on the performance of electron gun is further studied. 3. According to the parameter requirement of 220GHz backwave tube in the teaching and research department project, a double anode ribbon injection backwave tube electron gun working in 220GHz is designed. The first anode voltage is 10 kV, the second anode voltage is 8 kV / 12 kV, and the steady current 18.4mA can be obtained. The current density of cathode emissive surface is about 7.5A 路cm ~ 2, and the current density of cross-section at the waist of injection is about 116A 路cm ~ (- 2). The range of electron gun is greater than 7mm, the ratio of transverse to longitudinal is 20m3, and the area of injection waist is less than 400渭 m 脳 60um. Based on the study of 140GHz double anode strip electron injection gun, the further study is carried out. The influence of the change of cathode structure and anode channel on the performance of electron gun is discussed. Based on the actual requirements of the device, the single anode and double anode electron guns are designed, which meet the requirements of the parameters. It has important reference value for the research of ribbon injector.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN102
本文编号：2439559
[Abstract]:With the development of military science and technology and the continuous renewal of civilian demand, higher requirements for vacuum electronic devices have been put forward. Higher frequency, larger power, wider band and miniaturization of devices bring new challenges to traditional vacuum electronic devices. Theoretically, it can increase its wide edge infinitely so that it can transmit more current. Therefore, the ribbon beam is more suitable to produce high frequency and high power radiation than the traditional circular beam. And the slow wave structure of the belt injection can adopt the flat plate which is more convenient to process. The development of strip injection vacuum electronic devices will promote the advancement of vacuum electron devices. Therefore, this paper makes a preliminary study on the ribbon electron injection gun, the main work of which is as follows: 1. According to the parameter requirement of W-band traveling wave tube, a single anode ribbon beam traveling wave tube electron gun working in W-band is designed. When the anode working voltage is 21.1kV, the stable current of 400mA can be obtained. At this point, the current density of cathode emissive surface is 28.78A 路cm ~ 2, and the cross-section current density of the injection waist is about 133A 路cm ~ (- 2). And the range of electron gun is about 10 mm, the ratio of aspect to aspect is 10? 3, the cross section size of injection waist is smaller than 1mm 脳 0.3 mm, and the influence of the change of anode voltage and the distance between cathode and anode on the performance of electron gun is further studied. 2. According to the parameter requirement of 140GHz backwave tube in the teaching and research department project, a double anode ribbon injection backwave tube electron gun working in 140GHz is designed. The first anode voltage is 15kV, the second anode voltage is 15kV / 18kV, and the steady current 42mA can be obtained. At this point, the current density of cathode emissive surface is about 14.4A 路cm ~ (- 2). The range of electron gun is greater than 11 mm, the aspect ratio is 10? 1, and the cross section size of the injection waist is less than 1mm 脳 0.1 mm. The influence of the change of the first anode voltage and the distance between cathode and anode on the performance of electron gun is further studied. 3. According to the parameter requirement of 220GHz backwave tube in the teaching and research department project, a double anode ribbon injection backwave tube electron gun working in 220GHz is designed. The first anode voltage is 10 kV, the second anode voltage is 8 kV / 12 kV, and the steady current 18.4mA can be obtained. The current density of cathode emissive surface is about 7.5A 路cm ~ 2, and the current density of cross-section at the waist of injection is about 116A 路cm ~ (- 2). The range of electron gun is greater than 7mm, the ratio of transverse to longitudinal is 20m3, and the area of injection waist is less than 400渭 m 脳 60um. Based on the study of 140GHz double anode strip electron injection gun, the further study is carried out. The influence of the change of cathode structure and anode channel on the performance of electron gun is discussed. Based on the actual requirements of the device, the single anode and double anode electron guns are designed, which meet the requirements of the parameters. It has important reference value for the research of ribbon injector.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN102
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