新型毫米波磁控管磁系统的研究与设计

对毫米波磁控管磁系统进行理论研究,提出了一种新型毫米波磁控管磁系统的设计,并进行了验证.     

潘尼管和回旋管的比较

简要叙述了回旋管和潘尼管在高频结构中使用磁控管型波导和回旋谐波工作的进展，对两种管于(用圆波导磁控管型波导为高频电路)在工作原理上以及谐波工作性能上的主要异同点进行了比较。提出潘尼管将是满足毫米波通讯毫米波雷达发展所需要的先进的快波器件。     

毫米波人体安检机电磁辐射安全评价方法

毫米波人体安检机现已广泛应用在各种需要安检的场景中,其电磁辐射安全问题受到社会的关注。该文给出了毫米波人体安检机电磁辐射安全评价的方法,详细介绍了测试原理、测试仪器及测试位置的选择、测试状态的设定。该评价方法可以有效地测量毫米波人体安检机的电磁辐射,目前已作为GB/T 41482-2022的一部分应用到实际的测量中。国内外11款毫米波人体安检机的实测结果表明,毫米波人体安检机的电磁辐射均小于GB 8702-2014中的公众暴露控制限值要求,可以放心使用。     

磁控管脉冲前沿抖动测试技术研究

本文就磁控管的振荡脉冲前沿抖动的测试技术进行了研究，并研制了相应的测试仪器。该仪器是基于脉冲前沿抖动的ＭＩＬ标准定义，采用了单片机技术进行控制和数据处理。同时还解决了抖动信号的高速转换及单片机的抗干扰等难题。其优点是不仅精度高而且不用调制器外触发和精密延时线。     

毫米波技术发展评述

处于高速发展中的毫米波技术是当代高技术的前沿领域之一。本文综述了近年来在研制毫米波器件、毫米波系统以及毫米波测试仪器方面的发展现状和达到的水平,展望了毫米波技术的发展前景。     

钪酸盐阴极在脉冲同轴磁控管中的应用

从实际出发,以数据为依据,阐述了不同的阴极类型对脉冲同轴磁控管性能的影响,并着重介绍了钪酸盐阴极在毫米波段脉冲同轴磁控管中应用的优越性。     

磁控管中辅助热阴极式冷阴极技术研究

冷阴极技术是磁控管的重要发展方向,辅助热阴极式冷阴极技术在短毫米波和太赫兹磁控管中应用,可以突破阴极尺寸的限制,突破阴极发射能力的瓶颈,延长阴极使用寿命。文中对辅助热阴极式冷阴极的基本原理进行了理论分析,采用PIC软件分析了不同工作条件下电子相位的分布情况,在此基础上开展了W波段辅助热阴极式冷阴极磁控管试验研究,在磁场0.72 T、电压14.6 kV 条件下,磁控管输出功率340 W,工作频率95.913 GHz,磁控管能正常起振。     

噪声系数测试仪的原理及毫米波扩频测试技术

Agilent 8970B噪声系数测试仪是低噪声、高灵敏度接收机,与Agilent 8971C扩频装置、本振一起使用,可以将测试频率扩展到26.5 GHz.介绍了其原理及测试方法,该方法通过外加变频器将频率扩展到毫米波(40 GHz),实现了毫米波组件的噪声系数测量,并且对该毫米波系统噪声系数进行了测量结果不确定度分析,噪声系数测量不确定度为0.55 dB.噪声系数测量不确定度与被测件的噪声系数及输入、输出驻波比关系密切,因此在工作中对仪器的选择,连接件的连接显得至关重要.对毫米波噪声系数测量系统进行了大量测试,很好地满足了毫米波噪声系数的测试需要.     

多层结构微波毫米波薄膜电路制作工艺研究

近年来,随着通信和侦察技术向更高频率发展,对诸如频谱分析仪、扫频信号源和网络分析仪等测试计量仪器提出了更高的要求。众所周知,作为这些微波测试计量仪器中的关键部件,薄膜混合集成电路是测试仪器向40GHz以上发展的一个主要难点。微波毫米波工程中大量使用薄膜混合集成电路,这些电路是由多种材料组成的多膜层结构。研究了多层微波薄膜电路的材料性能、膜层结构特征及制作过程的工艺控制方法。还给出试验结果,并作了简单讨论,这对于微波和毫米波元器件的设计和应用有着一定的参考价值。     

家用微波炉整机的EMI测试与设计

微波炉存在EMI问题，国际上对家用微波炉规定了严格的EMI标准，微波炉中电磁干扰的主要源头之一是磁控管，如果微波炉和磁控管的设计协调，微波炉整机的EMI会得到很的抑制，文章就微波炉和磁控管的相关设计与EMI测试关系进行了讨论，在成本和测试效果之间找到了平衡点。     

Magnetron Research at Columbia Radiation Laboratory

Current magnetron research and development at Columbia Radiation Laboratory is principally directed towards the production of the shortest wavelengths in the millimeter region; the development of high power in the millimeter region; the development of wide range tunable tubes; and the investigation of low field magnetron operation.     

强流相对论电子束环产生的毫米波相干辐射

本文研究由跃变磁场产生的绕轴高速旋转的电子束环(E层)产生毫米波相干辐射的特性。我们采用符拉索夫-麦克斯韦方程分析E层与磁控管腔的相互作用,导出色散关系,并进行了数值分析。结果表明,微波幅射频率为r=l∥(其中∥是电子在轴向磁场中的相对论迴旋频率;l是方位角方向上的模数,l=n+mN,N是磁控管腔的边腔数,n=0,1,2,,N/2,m是任意整数),而且l很大时辐射仍有足够高的增长率。这有利于在低的轴向磁场中产生毫米波辐射。如能很好地解决模式控制问题,就能做成低磁场的可调谐大功率毫米波器件。     

Propagation of very short pulses at millimeter wavelengths through rain filled medium

Distortion of pulses with pulse widths ranging from 0.1 to 1 ns propagating with carrier frequencies in the range 10–100 GHz through rain filled medium has been estimated considering the absorptive and dispersive effects produced by rain drops on the propagation of millimeter waves. It is found that the rain induced broadening or compression can be quite appreciable for very short pulses in the window region of millimeter wave band under intense and extensive raining conditions.     

Molecular beam millimeter sidebands Fourier transform spectrometer (MB-MMSBFT)

The high resolution Fourier transform technique has been extensively applied in the centimeter range. In the past few years great progress have been made in observing molecular complexes. Most instruments operate between 2 and 26 GHz. So, very light interesting molecular species cannot be observed. The extension of the method towards the millimeter range suffers important technological shortcomings. A sidebands generation technic allowing the generation of very short pulses, all over the millimeter wave range, is described. For the first time, the experiment is performed in a resonant cavity and on a supersonic nozzle beam.     

A method for the 2.45-GHz magnetron output power control

A new method that overcomes the disadvantages of the conventional magnetron output power (MOP) control is presented in this paper, The conventional LC single-phase half-wave doubler supply has been modified in order to allow the use of a manually controlled and/or PC-controlled electronic variator. Trains of high-voltage pulses followed by inhibited high-voltage pulses are periodically applied on the magnetron anode yielding a corresponding variation of the average MOP, with programmed steps, maintaining the advantage of peak microwave output power operation. The PC-controlled system provides a practically continuous variation of the magnetron average output power     

The potentialities of hybrid model used for analysis of oscillatory systems for millimeter-wave magnetron

We consider the hybrid model from the viewpoint of its applicability to analyze equiresonator magnetron waveguide oscillatory systems used for millimeter band. The use of this model provides efficient analysis of the main characteristics including losses.     

精确制导武器和技术

精确制导武器是高技术局部战争使用的主要武器,精确制导武器的关键技术是精确制导技术,它的重点研究内容是易变战争环境中精确命中目标乃至目标要害部位的寻的末制导技术。国外精确制导技术以红外成像制导、毫米波制导、多模或复合制导,智能化信息处理技术为主要发展方向。精确制导武器从高作战有效性和完成一个作战任务来看是高效费比武器。     

W 波段回旋行波管双阳极磁控注入电子枪的设计

回旋行波管是大功率、高频率的微波毫米波器件。根据W波段回旋行波管的要求,设计了双阳级磁控注入电子枪。由电子光学理论,计算得到电子枪的初始参量,然后利用粒子模拟软件MAGIC构造电子枪模型,分析电子枪各个参数对电子注性能的影响,为电子枪设计优化提供了一定的依据。最后优化得到符合设计要求的低速度零散电子枪结构。电子枪阳极电压为70kV,电流10A,电子注速比1.07,电子注横向速度零散0.8%。     

Design and performance of a high power pulsed magnetron

This paper describes the salient features of a magnetron which attained by the spring of 1953 a peak power of up to 10 megawatts at 10 microseconds pulse duration and 17 kilowatts average power. There was little previous knowledge or experience available for guidance at the time (1947) the development was started. Among the most important problems which had to be solved were: 1) The establishment of reliable criteria of π-mode stability as guides for high power magnetron design; 2) the development of a microwave window of sufficient bandwidth for lower order mode loading and which would permit operation of the tube at full power in air at atmospheric pressure; 3) the development of a cathode capable of withstanding high back bombardment power with reasonable life; 4) the development of methods for fabricating a large magnetron; 5) the elimination of voltage breakdown in various parts of the magnetron; 6) the development of a modulator to produce and measure 2 to 10-microsecond pulses up to 100 kilovolts and up to 400 amperes; and 7) the development of a calorimetric load of low thermal capacity for testing the magnetron at full power. This paper is intended to assist the designers of magnetrons and systems to better appreciate: 1) The problems involved in the simultaneous attainment of multimegawatt power levels at long pulse durations, long wavelength and high duty; 2) what has been accomplished in this regime with magnetrons; and 3) that the experimental material given in the discussion is representative of an advance in magnetron art and not necessarily a limitation of what can be expected by way of performance from the pulsed magnetron.