3MHU X射线CT球管的研究

本文介绍了3MHU X射线CT球管的设计过程,包括了电子枪、旋转阳极靶、高速轴承以及高效散热管壳的设计;实际制成了样管并进行测试,从测试结果验证此设计方案的可行性和正确性。     

X波段70W空间行波管研制

X波段空间行波管是卫星数传分系统的关键部件,本文根据卫星数传要求,给出了X波段70 W空间行波管的设计与样管研制情况,研制样管的测试结果满足指标要求,并通过了鉴定级环境试验。     

步进式自动封口机控制系统的研制

步进式自动封口机是一套12工位的封口设备,针对玻璃真空管封口工序而研制,由封口主机、供件辅机和出件辅机以及控制系统所组成,整套设备只需上管和下管两名工人操作即可完成。文章叙述了自动封口机控制系统的研制过程,主要包括封口机结构、控制要求,控制方案、PLC以及外围硬件的选择等内容,其中工件内外管的同步旋转和退火灯头的定位采用步进电机作为驱动电机,并选用触摸屏作设备监控。     

高功率脉冲氢闸流管的设计模拟与实验分析

脉冲氢闸流管主要用于雷达装置中,特别是中、远程警戒雷达,是其调制器的核心开关元件。目前,在脉冲氢闸流管新品研制中普遍采用经验模式来完成前期的样管设计,并根据样管测试结果与技术指标的对比,进行后期针对性的修改。这种研制模式由于需要反复修改样管结构,导致零件浪费较多,并且效率比较低下。本文旨在利用计算机来仿真脉冲氢闸流管内部电场与脉冲放电工作情况,从而实现对脉冲氢闸流管放电结构的改进。将改进后的结构应用于样管中,从测试数据上印证了利用计算机模拟辅助新品研制这一方法的合理性。     

S波段5MW大功率速调管的研制

本文介绍了S波段脉冲5 MW高平均功率脉冲速调管的设计和制造情况。设计主要包括电子枪光学系统、电磁聚焦系统、高频谐振腔系统、射频馈入与输出系统、收集极热状态情况。研制的样管经测试已基本达到预期目标,研制过程中对部分关键工艺进行了研究,提高了速调管在大功率下的工作稳定性。     

脉冲空间行波管的研制

脉冲空间行波管主要用于环境卫星、微波遥感卫星、海洋卫星等军民用卫星系统,本文主要介绍了中国科学院电子学研究所脉冲空间行波管的研制进展,包括栅控电子枪、双渐变慢波系统、高匹配性能输能结构、多级降压收集极的设计方案、样管测试结果及环境试验情况等。     

基于旋转调制的MEMS捷联惯导系统设计

根据惯性器件旋转调制原理，设计基于MEMS惯性器件的旋转调制式捷联惯导系统。在阐述系统的工作原理和结构技术特点基础上，主要从系统硬件设计、软件设计方面介绍系统研制过程。系统硬件电路主要包括基于F28335的数据采集电路、基于ADS1258高精度A／D采集电路、直流电机PWM控制电路。基于DSPF28335平台下开发系统嵌入式软件主要完成数据采集、旋转控制、导航解算等功能。实验表明，系统可以有效提高MEMS惯性器件性能，对比同精度水平系统具备较大成本优势，是一种比较理想低精度惯导系统。     

近红外光纤隔离器的研制

本文介绍近红外波段(波长λ=1.15μm,…λ=1.52μm)光隔离器研制的一些结果。该器件是根据YIG磁性晶体的磁光效应——法拉第旋转效应的原理进行设计的。文章讨论了这种器件研制过程中的一些主要问题,其中包括45°法拉第旋转器的设计、旋转角及器件参数的测量方法、结构小型化及偏振补偿等问题。测试结果表明:正向损耗<2.2dB,反向损耗>25d B(波长λ=1.15μm和λ=1.52μm)。采取一定措施后,性能仍可提高。在光路中(光束光路及光纤光路)使用光隔离器可消除光路系统中反向光对半导体激光源引起的自耦合效应,使光源功率输出、模式、频率等稳定性提高,同时对消除反向波引起的反射噪声有良好效果。光隔离器在光信息传输系统中是一种不可少的器件。     

大跨度偏光片斜角裁切设备的研制

介绍了在偏光片斜角裁切设备的研制中, 如何实现大跨度偏光片精确的旋转角度并裁切的过程. 通过采用高刚性交叉滚柱轴环和滚动轴承以及电机、导轨、丝杠组合结构设计了角度旋转机构,利用编码器、PLC 控制角度旋转和角度显示,通过刹车系统控制角度旋转的到位停止,保证了角度旋转的精度,同时保证了偏光片角度裁切精度.机械抗变形工艺设计和电液联合控制系统以及合理的同步工艺设计,保证了大跨度偏光片的精确裁切.     

SF-1407型硅增强靶(SIT)摄象管的设计与研制

本文叙述 SF-1407型硅增强靶(SIT)摄象管的设计及研制,包括整管方案考虑、移象段电子光学系统的方案分析与设计计算、电子枪及硅二极管列阵靶的设计、结构设计及工艺特点等有关问题。     

Optimum Design for RF Windows in Millimeter Wave High Power Tubes

The pill-box and block RF windows for millimeter wave (MMW) tubes are presented. The pill-box window is suitable for broadband MMW tubes. And the block window can be used for high power tubes in short MMW. The equivalent circuits for two windows are given. To reach better match characteristics in wider operating bandwidth, the optimum design methods for pill-box and block window in MMW tubes are described in this paper. The testing results show that the theoretic computation is fast and useful accuracy. The design methods possess references value to designer for MMW tubes.     

宽带行波管高频结构和互作用区的设计和实现

计算机辅助设计对行波管的设计非常重要。本文首先利用微波管模拟器套件（MTSS）软件的高频电路模拟器模块计算得到行波管慢波结构的色散、耦合阻抗、衰减常数高频参数,然后运用其注波互作用模拟器模块仿真得到行波管输出功率,最后将仿真结果与样管实测功率进行比较,从而验证了MTSS软件的可靠性。     

High gain traveling-wave amplifiers

Modern techniques make it possible to build traveling-wave amplifiers with stable gains as high as 60 or 70 db. Such tubes can have relatively flat frequency response, and high gain over frequency ranges well in excess of two to one. In design it is necessary to pay strict attention to adequate isolation of the input and output so that spurious feedback paths do not cause oscillation or excessive variation of gain with frequency. In many practical applications, such tubes are required to operate with source and load impedances which produce large reflections of energy. Special design techniques result in tubes which are stable under such conditions. Another feature which can be achieved in modern tubes is a high ratio of backward loss to forward gain, so that the amplifier can very effectively isolate an oscillator. The recent design trend is toward higher currents and lower voltages, which is of direct benefit to the equipment designer, since it results in shorter tubes as well as simpler power supply designs, With the use of highly convergent electron beams, cathode current density can be kept quite low, and ion bombardment effects minimized, so that excellent life is achieved. Traveling-wave amplifiers may be readily phase modulated since small variations in the beam voltage yield large phase excursions. This characteristic is used for high level mixing. By proper gun design, it is possible to obtain good mixer action with modulation frequencies as high as a few hundred megacycles. The problems involved in obtaining the above characteristics and typical experimental results are illustrated by data on the STS-69, a half-watt twt for the 2 to 4 kmc frequency range.     

CT用旋转阳极X射线管市场研究与预测

阐明了我国ＣＴ机对旋转阳极Ｘ射线管市场的需求，并提出了切入此领域的建议。     

An Experimental Gyro-TWT

Three experimental gyro traveling wave tubes (TWT'S) have been built and tested. All tubes used a fundamental cyclotron resonance interaction with the circularly polarized TE/sup 0/sub 11/ dominant waveguide mode. The tubes differed in the length of the single circuit section and in the amount of distributed loss used. The experiments were conducted at 5 GHz, with the object of producing a design that could be scaled to 94 GHz. Results on the third experiment include measurements of stable gain as high as 24 dB small signal and 18 dB saturated. A saturated power output of 120 kW at a total beam efficiency of 26 percent was measured with a 3-dB saturated power output bandwidth of 6 percent. The design features of the tubes and the experimental results are described fully.     

全静电摄像管的结构设计

本文分析了采用图案型偏转电极的全静电摄像管的特点，介绍了整管的结构设计。设计并制作了两种不同结构、性能良好的２／３英寸全静电摄像管，中心分辨率为４５０电视行，畸变小于１．５％。     

X波段行波管阳极控制电子枪设计

大功率电子枪设计中的主要问题是如何构成强流电子束和使电子枪中电子束聚焦。利用差值计算的方法初步确定了电子枪几何尺寸参数,进而应用数值模拟的方法计算了电子枪的结构及束流特性,设计了应用于X波段连续波大功率行波管的阳极控制电子枪。该电子枪设计参数为：阳极调制,导流系数为0．44μP,射程大于37mm,注腰半径为1mm。结果表明,该电子枪可完全满足x波段连续波大功率行波管对互作用电子束的要求。     

Recent advances in high-power ignitron development

The authors describe the advances made in high-power ignitron switching capabilities in a comparison study between conventional size D and size E tubes, demountable experimental tubes, and the new NL-9000 (Richardson Electronics). The authors discuss the differences in tube design and the associated peak current and charge transfer capabilities and lifetime expectancies. The critical design criteria are the anode shape and placement in order to control the plasma and prevent prefires. Tube failure modes and recent studies on alternate ignitor schemes are presented. In addition, results of plasma diagnostics performed on a demountable ignitron with optical access to the discharge plasma are shown. Time-resolved images of the interference patterns from an optical Mach-Zehnder interferometer were recorded with a mechanical high-speed camera and evaluated with the help of image processing     

脉冲磁控管用H形阻抗变换器的设计

本文简要地叙述了H形阻抗变换器的设计方法,重点讨论了H形波导的截止波长应如何正确选择,才能使在调谐频率范围内磁控管的输出功率比较均匀。最后进行了装管热测,结果与予期目标较符合。     

过电压保护气体放电管

综述了过电压保护气体放电管的结构性能和原理，着重论述了放电管设计和大规模现代化生产的方法。同时，讲述了二电极放电管和三电极放电管的测试，试验及其应达到的主要标准。