毫米波无源对抗技术浅析

目前,毫米波无源干扰技术使毫米波对抗技术上了一个新的台阶。阐述了毫米波无源干扰技术：毫米波箔条、毫米波角反射器、毫米波隐身技术、毫米波吸收层等,并介绍毫米波无源干扰的一些新方法,展望其未来发展趋势。     

毫米波无源干扰技术的发展现状

综述各种毫米波无源干扰物和干扰物物投放控制技术,以及毫米波无源干扰技术的发展趋势。     

毫米波无源对抗技术浅析

针对毫米波具有的多普勒分辨率高、等离子体穿透能力强等特点,着重分析了可用于毫米波无源对抗的11种措施,包括毫米波箔条与箔片、毫米波烟幕、毫米波吸收层和角反射器及毫米波雷达干扰物控制投放技术等,以实施对毫米波导引头有效的干扰．毫米波无源干扰技术使毫米波对抗上了一个新的台阶,同时由于毫米波制导波段已从8mm向3mm扩展,使人们不断开拓新的思路,寻求新的毫米波对抗方法．     

对毫米波末制导雷达无源干扰效能分析

无源干扰是对抗毫米波末制导雷达的重要方式之一,包括烟幕干扰、箔条干扰等方式。从毫米波无源干扰的原理出发,对无源干扰进行效能分析,提出了各项效能指标,建立了相应的效能分析模型。     

毫米波无源干扰技术及膨胀石墨在其中的应用

针对毫米波精确制导的特点,分析了可用于毫米波无源干扰的几种材料及措施,包括毫米波箔条、毫米波箔片、毫米波纤维类、毫米波等离子体、泡沫云干扰、晶须类材料、膨胀石墨,并着重分析了膨胀石墨瞬时膨化剂的特点及其实际应用中有待解决的问题.对增强膨胀石墨瞬时膨化剂在毫米波及宽波段无源干扰中的应用和发展进行了分析和探讨.     

红外/毫米波干扰一体化材料——膨胀石墨的研究动态

膨胀石墨能同时对红外和毫米波产生衰减,是一种具有潜在军事应用价值的红外/毫米波无源干扰一体化材料.在综述膨胀石墨制备方法的基础上,探讨了膨胀石墨作为无源干扰材料的战术使用方式及其对红外/毫米波的干扰机理,并对制约膨胀石墨军事应用的技术难点进行了分析和讨论.     

雷达无源干扰技术的发展现状

雷达无源干扰技术作为电子战的重要组成部分，在二战和历次现代战争中都发挥了巨大作用。经过几十年的发展，今天已达到相当高的水平。本文概述了雷达无源隐身、无源压制式与欺骗式干扰，以及毫米波无源干扰技术及其发展现状。     

毫米波技术性能分析及其无源干扰方法研究

新型高效、大功率毫米波功率源、介质天线、集成天线、低噪声接收机芯片等相继问世,使毫米波技术发生了巨大的变革,并且大大地拓宽了它的应用领域。毫米波具有波束窄、带宽大、抗干扰能力强,可穿透雨、雾、战场浓烟、尘埃进行探测等一系列优点。因此,本文介绍了毫米波技术的优点及其可行的一些无源干扰方法。     

抗红外/毫米波复合制导的无源干扰技术发展现状

红外/毫米波复合制导技术抗干扰能力强、能适应全天候作战,对目标发现概率大、制导精度高,对军事目标的生存构成严峻威胁.在众多干扰手段中,无源遮蔽技术的干扰效果好,效费比高,技术实现较容易.主要综述了无源遮蔽技术在对抗红外/毫米波复合制导方面的发展现状和趋势,重点阐述了无源遮蔽技术的实现方法,及其各自的作用原理和优缺点.     

毫米波无源干扰研究

根据毫米波辐射理论 ,研究了被动毫米波系统的无源干扰机理 ,指出干扰被动毫米波系统有两个途径 :一是遮蔽 ,增大毫米波在传输过程中的消光系数 ,可使用毫米波烟幕、毫米波箔条、箔片来完成 ;二是改变目标和背景辐射温度对比度 ,提出了毫米波自适应隐身技术 ,该隐身技术能自动调整目标的毫米波辐射 ,使目标和背景融为一体。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks