毫米波雷达技术前景分析

通过对毫米波雷达技术各关键技术的发展现状、发展趋势,以及中国与外国在毫米波雷达技术领域的最新发展动态进行分析,指出了毫米波雷达的技术优势和局限性,提出了毫米波雷达未来发展的方向,并探索4D毫米波雷达的技术方向,以供科研人员和专业技术人员参考。     

车载毫米波雷达目标检测综述

目标检测技术作为主动刹车系统的重要组成部分,对测距传感器的检测精度要求极高,毫米波雷达传感器是目标检测的最优选择。综述了毫米波雷达的发展状况、国内外现状、毫米波雷达目标检测算法,介绍了国内外多个重点实验室对毫米波雷达目标检测算法的研究情况,重点放在多传感器融合检测和毫米波雷达多目标检测上。阐述了车载毫米波雷达目标检测的技术难点,对未来毫米波雷达的发展方向提出了建议,以期为后续的研究开发做准备。     

直升机载毫米波雷达应用及其干扰方法探讨

介绍了毫米波雷达的应用及国外典型先进的直升机载毫米波雷达的现状,同时从毫米波雷达对抗的角度出发,分析了毫米波雷达的无源和有源干扰方法。     

毫米波雷达的应用及发展

随着毫米波技术的应用,毫米波频率的雷达也得到了更深的研究和发展,毫米波雷达具有导引精度高、抗干扰能力强、多普勒分辨率高、等离子体穿透能力强等特点;因此其广泛的用于末制导、引信、工业、医疗等方面．评述了毫米波雷达的优缺点,以及它的应用,详细阐述了军用毫米波雷达发展的新技术和新方法。     

浅谈毫米波雷达研究及其应用

随着技术发展,毫米波器件、毫米波集成电路日趋成熟,毫米波雷达在国内外得到了深入的研究和应用。本文分析了毫米波的波段特性,对毫米波雷达的研究及其应用进行了介绍。     

毫米波相控阵雷达及其应用发展

概述了毫米波相控阵雷达的特点,介绍了电扫原理和主要毫米波电扫技术,以及相位控制扫描和多种移相器技术。针对毫米波相控阵雷达的特点,叙述了其主要应用领域,结合雷达和半导体技术对毫米波相控阵雷达的发展进行了展望。     

大功率毫米波雷达及器件新技术研究

近年来,在电真空技术进一步发展和概念创新的基础上,借助于材料、工艺及微加工技术的进步,大功率毫米波器件取得了快速发展,诞生了大功率毫米波回旋行波管、W波段宽带行波管、准太赫兹行波管、毫米波扩展互作用速调管、集成微型行波管等新管型。在毫米波频段取得了输出功率100 W^100 kW、带宽6~10 GHz等标志性成果。利用上述性能优良的电真空器件结合雷达探测新技术,开展毫米波单脉冲精密测量及目标成像雷达、毫米波空间合成无源相控阵多目标监视雷达、毫米波微型行波管有源相控阵多功能一体化雷达、机载亚毫米波视频合成孔径雷达研究,突破大功率毫米波器件应用和发射机关键技术,实现大功率毫米波雷达空间目标的多维特征精细测量和成像等应用目标。     

毫米波雷达前端芯片关键技术探讨

毫米波雷达的距离分辨率和最大可工作距离通常受雷达射频信号带宽和发射功率的限制,具有宽工作带宽、高输出功率、高灵敏度、高精度相位控制的毫米波雷达芯片是实现高性能毫米波雷达系统的关键.毫米波雷达芯片的设计难点主要集中在阻抗匹配、噪声降低、功率提升、相位控制等方面.因此,该文针对毫米波雷达前端芯片设计难点的关键解决技术进行探讨和综述.     

雷达横截面毫米波测量雷达

毫米波频段有着广泛的应用领域,越来越受到人们的重视。文章介绍毫米波的应用领域之一——雷达横截面毫米波测量雷达,分析了等离子体效应,介绍了雷达横截面测量原理和测量装置,并对35GHz和70GHz的毫米波测量雷达作了概括的描述。     

毫米波雷达前端芯片关键技术探讨

毫米波雷达的距离分辨率和最大可工作距离通常受雷达射频信号带宽和发射功率的限制,具有宽工作带宽、高输出功率、高灵敏度、高精度相位控制的毫米波雷达芯片是实现高性能毫米波雷达系统的关键。毫米波雷达芯片的设计难点主要集中在阻抗匹配、噪声降低、功率提升、相位控制等方面。因此,该文针对毫米波雷达前端芯片设计难点的关键解决技术进行探讨和综述。     

毫米波雷达及无源干扰技术浅析

针对毫米波具有的多普勒分辨率高、等离子体穿透能力强、高跟踪精度和制导精度等特点,介绍了毫米波雷达在空间目标识别、精密跟踪、炮弹弹道测量、导弹的末制导系统、主动寻的技术等军事领域中的典型应用,分析了可用于毫米波无源对抗的几种措施。     

美俄主要武装直升机及其机载毫米波火控雷达发展现状

概述美俄几种主要武装直升机及其机载毫米波火控雷达发展现状,并对该型雷达的关键技术进行简要分析。     

Millimeter-wave radars for remotely sensing clouds andprecipitation

Millimeter-wave radars have been used since the early 1950s to study clouds and precipitation, but until recently these early instruments were limited to simple backscatter power measurements and were plagued by hardware problems. However, development of solid-state millimeter-wave componentry and high-power klystron amplifiers has spurred the evolution of reliable, coherent radars operating up to 95 GHz. In addition, advances in digital signal processing technology have resulted in single-card processors that can simultaneously execute algorithms to compute reflectivity, Doppler, and polarimetric quantities in real time. A review of the current state of the art in millimeter-wave cloud radars is presented, including a discussion of transmitters, antennas, and receiver components. Two radar systems built by the University of Massachusetts are described, including a mobile, dual-frequency (33- and 95-GHz) polarimetric radar, and an airborne 95-GHz polarimetric radar that was recently flown in a cooperative experiment with the University of Wyoming. Spaceborne applications are also discussed, especially the use of satellite-based 95-GHz radars for measuring the vertical distribution of clouds     

毫米波相控阵板级集成天线技术研究

随着毫米波雷达及通信系统的快速发展,有源相控阵天线日益成为当前研究的热门天线形式。然而,毫米波有源相控阵存在空间紧凑、结构复杂、装配繁琐等问题。本文介绍了一种可应用于毫米波相控阵的板级集成天线,并对其天线阵列、垂直过渡等关键结构的设计进行了讨论。该阵面将天线阵列、收发组件和馈电网络全部集成在一块基板上,具有结构简单易于量产的特点。文末给出了对所设计的有源阵面的暗室测试结果,结果表明该天线在毫米波雷达和通信系统中具有巨大的应用潜力。     

Cloud and precipitation remote sensing at 94 GHz

The use of short millimeter-wave Doppler radars for the observation of clouds and precipitation is discussed. Attenuation and scattering (including Mie backscattering by raindrops) of this short-wavelength radiation by hydrometers is discussed as well as the sensitivity of such radars for the observation of clouds     

92 GHz dual-polarized integrated horn antennas

A dual-polarized two-dimensional imaging array was designed for millimeter-wave applications. The dual-polarized design consists of two dipoles perpendicular to each other and suspended on the same membrane inside a pyramidal cavity etched in silicon. The dual-polarized antenna is fully monolithic with room available for processing electronics. The IF or video signals are taken out through a novel bias and feeding structure. The measured polarization isolation is better than 20 dB at 92 GHz, and the orthogonal channels show identical far-field patterns. The antenna is well suited for millimeter-wave polarimetric synthetic aperture radars (SARs) and high-efficiency balanced-mixer receivers     

Traffic Surveillance System Based on a High-Resolution Radar

Traffic surveillance is an important civilian application of radars. The current high-resolution radars give new opportunities so that the traffic application may be redefined. In this paper, a traffic scenario with a high-resolution radar is presented. A range-bin alignment method, the Global Range Alignment, which comes from the focusing techniques in inverse synthetic aperture radar, is applied to obtain further capabilities than the usual velocity measurement: distinction between vehicle types via length estimation and adequate management in situations with simultaneous targets. Preliminary results from a real scenario using a high-resolution linear frequency-modulated continuous-wave millimeter-wave radar are shown.     

Through-the-Wall Surveillance With Millimeter-Wave LFMCW Radars

The use of millimeter-wave radars allows a weight and size reduction of circuits and antennas, which is an important characteristic for Through-the-Wall Surveillance (TWS) applications. Furthermore, when using the millimeter-wave band, a large amount of bandwidth can be easily transmitted, given that the relative bandwidth is smaller. This leads to a high range resolution that allows for the discrimination of several targets that are very close in range, e.g., inside a room. The azimuth resolution is also improved due to the availability in this band of directive antennas with small dimensions. This paper studies the feasibility of using a millimeter-wave linear frequency-modulated continuous-wave radar in a TWS application. A TWS experiment in a real scenario has been done to demonstrate the validity of the theoretical analysis.      

Infrared and millimeter-wave sensors for military special operations and law enforcement applications

We consider the application of infrared and millimeter-wave sensors, developed for the most part during the Cold War, to the solution of problems encountered by military special operations units and law enforcement personnel. These problems include detection of weapons concealed beneath clothing, through-the-wall surveillance, and wide-area surveillance under poor lighting conditions. Key sensors used in these applications are infrared cameras, millimeter-wave passive and active cameras, and millimeter-wave real-aperture and holographic radars. This paper discusses each type of sensor, describes its operation, and gives an example of its output, except in those cases where the device is early in its development phase and thus no outputs are available. All of these sensors form images, but the images are of varying quality. We conclude with a brief discussion of methods of using multiple sensors to improve performance.