毫米波辐射探测目标亮温的估计

毫米波近感技术是利用物体的毫米波辐射特性探测识别目标，在许多领域有着重要应用。为在毫米波辐射探测中求得精确的真实目标亮温，必须建立天线电磁辐射与环境电磁辐射交会的数学模型，此模型是第一类病态Fredho1m积分方程。寻找适当的方法能得到一个尽可能好的或同精确值相当接近的近似计算方法，为此，本文给出毫米波辐射计目标辐射亮温的估计方法。     

一种可见光与毫米波辐射图像的融合方法

研究了波段相差极大的可见光和毫米波传感器图像的融合算法,提出利用小波变换将基于可见光的模拟毫米波辐射图像与实测毫米波辐射图像的相关信息进行融合,合成的图像可用来地图匹配制导以及辅助提高战场决策的正确率。仿真结果表明：融合图像包含了更多的互补信息,提高了实测图像质量。     

Image Displaying Method of Ground-Based Millimeter Wave Radiometric Imaging System

The image displaying methods used in a millimeter wave radiometric imaging system have great influence on its imaging quality. In order to obtain high quality millimeter wave radiometric images, intensive studies on the image displaying methods are needed. This paper describes the image displaying method of Ground-based 8mm Millimeter Wave Radiometric Imaging (GMWRI) system and compares two different image displaying methods. The experimental results prove the unequal size element arc displaying method fits GMWRI system better.     

毫米波辐射图像分辨率增强方法研究

针对毫米波辐射图像分辨率低的问题．提出了一种新的分辨率增强方法该方法将双线性插值与改进的非线性外推相结合,首先利用双线性插值放大原始图像．再利用改进非线性外推算法增加图像的高频分量,最终实现毫米波辐射图像的分辨率增强．实验表明．新方法有效提高了毫米波辐射图像的分辨率     

装甲目标毫米波辐射亮温解的优化控制

毫米波系统有着较微波、红外、光学系统不同特性的优点.毫米波辐射探测技术在许多领域有着重要应用与发展.为能求得真实的目标物体亮温,从测得的天线温度数据或天线温度分布函数中反演出装甲目标的亮温分布,需解第一类Fredholm积分方程.该积分方程是一病态方程.DFP法算法是无约束最优化方法中最有效的方法之一.本文尝试用DFP法优化控制毫米波装甲目标辐射亮温,得到较为稳定的反演解.     

Experimental Research on Passive Millimeter Wave Radiometric Stealth Technology of Metal Objects

Working all day and all weather, a passive millimeter wave radiometer (PMMW) can be widely used in civil and military affairs. It can get some specific information about the material characteristics different from radar and infrared detectors. On basis of the radiometric operating range equation, the radiation cross section and stealth effect of metal objects are presented for the PMMW near-sensing application. The measurement experiments of metal solid models adopts 3?mm band Dicke radiometer with the outdoor calibration system. The sky temperature and other different surface metal objects are also measured as the contrastive experiments. The results show the radiometric temperature contrasts of solid models have remarkable difference in the bare and coated conditions, and the radiometric operating range can decrease to 60.8?%. In addition, the PMMW stealth methods through different surface treatment respectively reduce the radiometric antenna temperature contrast in some degree.     

用于高速无线通信的毫米波行波管

毫米波行波管可以为高速无线通信提供高性能与实用化的功率放大器解决方案.国外正在开展多项基于毫米波行波管的高速无线通信技术的研究,工作频率范围在71~300GHz.本文综述了国内外71~235GHz的毫米波行波管的技术发展与研制水平,并结合作者所在团队的研究成果分析了研制该类器件所需要解决的慢波结构微加工、新型慢波结构设计和宽带低损耗输能等关键技术.     

应用灵活的解决方案进行毫米波测量

在30至300 GHz之间,毫米波测量的应用正在增加.从高数据速率到汽车行业再到射电天文学,灵活的测量解决方案正日益显现出它的优势.在这些应用中,毫米波测量解决方案就必须遵守很多规则.例如,探测环境中的晶圆器件表征,或通过波导或同轴接口进行模块测试.解决方案还包括夹具中或自由空间的材料测量,或室外/室内天线测试.     

Dynamics of Short Sea Wave Spectrum Estimated From Microwave Radiometric Measurements

This paper presents some results of the experiment CAPMOS'05 performed on an oceanographic research platform in the Black Sea. The platform, located 600 m offshore, was equipped with a set of contact and remote sensing instruments. Conventional contact sensors were used for direct measurements of atmosphere and sea boundary layer parameters (wind speed and direction, air temperature, water temperature and salinity profiles, etc.), whereas microwave and infrared band radiometers were used for remote sensing measurements of surface temperature and wave parameters. In particular, microwave Ka-band radiometer measurements were applied for gravity-capillary wave spectrum retrieval using the original techniques based on angular measurements. The spectrum component evolution under unstable wind conditions has been investigated. It has been demonstrated that the spectral components in the vicinity of the maximum of the wave curvature are the most sensitive to the wind-velocity variations.      

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。     

Performance and Application of Slow Wave Circuits for Power TWT in Millimeter Wave

In millimeter wave range, high-power traveling wave tube (TWT) is a key device with broadband and high-power amplification. Basis of comparing traditional and new type slow wave circuits for high-power TWT in MMW, analysis and computation of propagating and RF performance for folded wave circuit are carried out. Theoretic calculation and experimental test show that folded wave circuit is an ideal slow wave structure for broadband and high-power TWT in MMW. There is extreme wide application for the circuit in high-power TWT. This development possesses important consult value to designer for MMW power amplifiers.     

5G毫米波在室内的应用及探讨

随着移动互联网和物联网带来的庞大数据业务需求,使得频谱资源逐渐趋于饱和,而高频段毫米波可用频谱资源丰富, 能够有效缓解频谱资源紧张的现状,满足5G移动通信系统大容量和高速率传输等方面的需求。业界对此高度关注,开始加速5G系统高频段毫米波的研究级应用。本文主要针对5G毫米波通信技术,通过室内链路预算仿真结果,探讨毫米波在室内应用场景。     

大功率毫米波行波管发展现状

毫米波行波管是一种具有重要发展前景的毫米波源,本文简要介绍了耦合腔行波管和螺旋线行波管的工作特点,以及国际上毫米波行波管的发展现状和趋势,指出了发展中遇到的一些关键问题。     

毫米波器件的技术发展与应用

对毫米波器件的技术进步和研发水平进行了详细论述,同时对毫米波器件关键的材料、工艺及集成电路的发展进行了分析,指出该技术的应用在军事上有着广阔的前景,对雷达、毫米波通信、精密制导等装备的研制有较好的指导作用.     

The Millimeter Wave Tomography Application for the Subsurface Imaging

In the present paper new results of modeling and experimental investigation on millimeter wave subsurface tomography are submitted. Tomographic algorithm is employed for imaging of subsurface objects in the case when conductivity of probed medium is not equal to zero. The possibilities and restrictions of this algorithm for image processing are shown both as a result of modeling and as a result of experiments. A new tomography setup allowing obtaining images of different inhomogeneities in dielectric media is considered.     

Application of SSOR Preconditioning Technique to Method of Lines for Millimeter Wave Scattering

In this paper, symmetric successive overrelaxation (SSOR) preconditioned CG technique are introduced into method of lines (MOL) to further enhance the computational efficiency of this semi-analytic method. Millimeter wave scattering by an infinite plane metallic grating is used as the examples to describe its implementation, whose analysis usually needs fast algorithms because of electrically large dimension. For arbitrary incident wave, Helmholz equation and boundary condition are used to calculate the impedance matrix and then to obtain reduced current-voltage linear matrix equation in spatial domain. An effective symmetric successive overrelaxation preconditioned conjugate gradient iterative method, SSOR-PCG, is chosen to solve this matrix equation. With SSOR as the preconditioner as well as its efficient implementing in CG algorithm, PCG method can converge to accurate solution in much fewer iteration steps.     

毫米波技术及应用进展

近十年来世界范围的毫米波技术研究不断向前推进。随着毫米波技术的日趋成熟，毫米波的应用领域不断扩大。为军事需要而发展起来的毫米波技术正在开拓广泛的民用市场。本文综述毫米波技术及其应用进展。