简介：极端宽带(UWB)要求的高速度的高分辨率的analog-to-digital(A/D)变换信号处理是一个很挑战性的问题。这份报纸为UWB信号获得建议一个平行随机的设计方法。建议方法能完成高采样率，高决定和硬件实现的技术可行性。在建议方法，一个模拟UWB信号在一套随机的符号函数上被投射。然后，低率的高分辨率的analog-to-digital变流器(模数转换器)被用来取样设计系数。信号能被简单线性计算与采样矩阵重建，没有遵循优化算法和优先的知识。在另外的方面，不同其它走近那需要在极其高的频率利用精确时间移动，或设计一个混合过滤器银行，或与优先的知识为信号产生特定的基础功能或工作，建议方法是一条通用采样途径并且对容易适用。到噪音比率(SNR)和假免费的动态范围(SFDR)的信号的模拟结果为UWB信号获得验证建议方法的效率。

简介：Anewultra-wide-band(UWB)hornantennabasedonthenonradiativedielectricwaveguide(NRD-guide)wasproposedtosolvetheproblemofUWBantennas,TEMhornsforexample,generallysufferfromlargesideleakage.Theruleofthetheoreticalselectionofitsparameters,ifNRD-guideisusedastheUWBantennas,isstudiedfirstly,thentheradiationcharacteristicsforanopen-endedNRD-guidearecalculatedbyFDTD(finite-differencetime-domain)method.

简介：Inthispaper,spatiallyangularmultiplexingtechniqueinpulseddigitalholographyandanopticalsystembasedonthistechniqueareintroduced.Opticalsimulationandcalculatinganalysisshowthatthedesignedsystemcanbeemployedtorecordultra-fasteventsofatimeresolutioninnanosecond.

简介：1.导言有机金属（OM）是导电聚合体的一种先进的形式,虽然呈有机化合物的特征,但是具有金属的属性;此材料由碳、氢、氮、氧以及硫酸盐组成,经过人工合成并以10纳米大小的原始颗粒进行水溶性分散【1】。多年前的研究就发现该材料能非常有效地防止铜的氧化【2】。10多年来,此材料作为电路板表面处理沉锡制程ORMECON?CSN的预浸被商业应用。在该制程中,有机金属在沉锡前

简介：EFD新推出的Ultra^TM2400系列点胶机，适用于各种工业流体，包括从稀薄的水性溶剂到粘稠硅胶和膏体状的树脂。全新的设计为市场提供了功能更全、控制能力更强的点胶系统。2400尽量减少占用工作台面积，为操作工释放更多工作空间；拥有独特的气压控制体系和高速电磁阀系统，能够完成精确、一致的点胶控制。机身上还可根据您的应用需求安装工作灯、手感舒适的手持点胶器和柔性的针筒支架等多种实用的配件。主要特性：

简介：Asimpleandcompactmicrostrip-fedUltraWideBand(UWB)printedmonopoleantennawithband-notchedcharacteristicisproposedinthispaper.Theantennaiscomposedofasquareringwithasmallstripbar,sothattheantennaoccupiesabout7.69GHzbandwidthcovering3.11～10.8GHzwithexpectedbandrejectionfrom5.12GHzto5.87GHz.Aquasi-omnidirectionalandquasi-sym-metricalradiationpatternisalsoobtained.Thiskindofband-notchedUWBantennarequiresnoex-ternalfiltersandthusgreatlysimplifiesthesystemdesignofUWBwirelesscommunication.

简介：Theexperimentalstudyofultra-wideband(UWB)technology,itsgenerationandon-linemeasurementarepresented.AnexperimentalrepetitiveUWBsystemisdesigned,manufactured,andtested.High-pressuresparkgapswitchanditscomponents,aswellasoilsparkgapswitcharestudiedexperimentallyonthesystem.Experimentalresultsindicatethatthesystemoperatesata200ppsrepetitiveratewithastableperformance.100MWpeakpowerUWBpulsesareobtainedonthesystem.Fast-timeresponsecapacitivedividerisdesignedandfabricated,allowingforanaccuratemeasurementofthehighpowerUWBsignal.ThemainissuesrelatedtothedesignoftheswitchandtheUWBsignalonlinemeasurementarediscussed.

简介：Aimingtotheestimationofsourcenumbers,mixingmatrixandseparationofmixingsignalsunderunderdeterminedcase,thearticleputsforwardamethodofunderdeterminedblindsourceseparation(UBSS)withanapplicationinultra-wideband(UWB)communicationsignals.ThemethodisbasedonthesparsecharacteristicofUWBcommunicationsignalsinthetimedomain.Firstly,findingthesinglesourceareabycalculatingtheratioofobservedsamplingpoints.Thenanalgorithmcalledhough-windowedmethodwasintroducedtoestimatethenumberofsourcesandmixingmatrix.Finallytheseparationofmixingsignalsusingamethodbasedonamendedsubspaceprojection.ThesimulationresultsindicatethattheproposedmethodcanseparateUWBcommunicationsignalssuccessfully,estimatethemixingmatrixwithhigheraccuracyandseparatethemixingsignalswithhighergaincomparedwithotherconventionalalgorithms.Atthesametime,themethodreflectsthehigherstabilityandthebetternoiseimmunity.

简介：AcancelingrangesidelobesschemehasbeensuggestedbyYangGuangzheng,etal.,(1997)thistechnologyisbasedonthefactthatallsidelobeofgroupcorrelationfunctionofidealsetsarezero.Atfirst,thispapergivesthebestidealsets(i.e.thebestbiphasecodesetswhosemaximalsidelobenotmorethan2)forallcodelengthN≤12,whichhavebeenobtainedfrombinarysequencesbymeansofthebestcodessievingmethodsuggestedbyYangGuangzheng,etal.(1997)ComputersimulationforgroupcorrelationpropertyofbestidealsetsforcodelengthN=12onvariousconditionsismade.Simulationresultshowsthatthesidelobelevelofbestidealsetwithnoweightingiszero,underconditionofzero-Dopplershiftandhasultra-lowsidelobeonDopplerupto5kHzwithnoweightingandwhosetoleranceofphaseandamplitudedistortionisbiggertoo.

简介：Fortheissueofdeteriorationindetectionperformancecausedbydynamicallychangingenvironmentinultra-wideband(UWB)multipleinputmultipleoutput(MIMO)radar,thispaperproposesanoveladaptivewaveformdesignwhichisaimedtoimprovetheabilityofdiscriminatingtargetandclutterfromtheradarscene.Firstly,asequenceofMorletwaveletpulseswithfrequencyhoppingandpulsepositionmodulationbyWelch-Costasarrayisdesigned.Thenawaveformoptimizationsolutionisproposedwhichisachievedbyapplyingtheminimizationmutual-information(MI)strategy.Afterthat,withsubsequentiterationsofthealgorithm,simulationresultsdemonstratethattheoptimalwaveformdesignmethodbringsanimprovementinthetargetdetectionabilityinthepresenceofnoiseandclutter.

简介：Inthispaper,aplasmonicsrefractiveindexsensorwiththesemiring-stubsystemcoupledtoabuswaveguideispro-posed.Thestructurecanachievewavelengthbandtunableandultra-sharpFanoresonance.Thecouplingmechanismbetweenthebrightmodeanddarkmodeisinvestigatedindetail,andapparentplasmoninducedtransparency(PIT)isrealizedontheresonancewavelength.Thefullwidthathalfmaximum(FWHM)oftheresonantwavelengthismodulatedbyadjustingthecoupleddistance.Thesensitivityandfigureofmerit(FOM)oftheproposedsensor'canreachupto600nm/RIUand120onthevisibleregion,respectively,andthisperformancecanbehelpfulfordesigningthephotonicintegratedcircuitandopticalcommunication,inaddition,itcanbeappliedforbio-sensing.

简介：Withrapiddevelopmentcommunicationsystem,highsignaltonoiseratio(SNR)systemisrequired.Inhighfrequencybandwidth,highloss,lowQinductorsandhighnoisefigureisasignificantchallengewithon-chipmonolithicmicrowaveintegratedcircuits(MMICs).Toovercomethisproblem,highQ,lowlosstransmissionlinecharacteristicswasanalyzed.Comparedwiththesameinductorvalueofthelumpedcomponentandthetransmissionline,ithasahigherQvalueandlowerlossperformanceinhighfrequency,anda2-stagecommon-sourcelownoiseamplifier(LNA)waspresented,whichemployssourceinductorfeedbacktechnologyandhighQlowlosstransmissionlinematchingnetworktechniquewithover17.6dBsmallsignalgainand1.1dBnoisefigurein15GHz–18GHz.TheLNAwasfabricatedbyWINsemiconductorscompany0.15μmgalliumarsenide(GaAs)Phighelectronmobilitytransistor(P-HEMT)process.Thetotalcurrentis15mA,whiletheDCpowerconsumptionisonly45mW.

简介：有极端协议、简单的结构的波长splitter被使用两飞机波浪扩大(PWE)建议并且分析方法和有限差别时间领域(FDTD)方法。设备基于在二平行的锂niobate之间的方向性的联合(LiNbO3，行)nanowire光波导。有5m的acoupling区域长度的波长splitter能比97%高用发射度为相应产量分开1.31m和1.55m波长。

简介：在这份报纸，聚合物电镀物品眼的调节的人被设计并且模仿了使用完整的vectorial有限元素方法。首先，顺序边元素在有限元素实现被使用，并且有限元素技术被用来彻底地获得调节的人反应。从数字分析，调节的人的频率分散重要参数，例如微波有效索引nm，微波特征阻抗ZC和微波损失，被提取。我们的设计展出260GHz的电的带宽和大约2.8V的开车电压?慶潰?湩搠瑥楡?朠瑥琠敨愠慮祬楴慣?硥牰獥楳湯漠吗？

简介：Anoveldirectsequence(DS)designmethodforsuppressingthenarrowbandinterferenceinDSspreadspectrumultra-widebandreceiversisproposed.Themethodhaslowcomputationalcomplexityandcanbeeasilyimplementedinpracticasystems.Simulationresultsprovethattheproposedmethodieffectivetosuppressthenarrowbandinterference.Therefore,theintegrityofboththeultra-widebandwidthandthenarrowbandsystemscanbehighlyenhanced.更多还原

简介：Withtheincreaseoftheclockfrequencyandsiliconintegration,powerawarecomputinghasbecomeacriticalconcerninthedesignoftheembeddedprocessorandsystem-on-chip(SoC).Dynamicvoltagescaling(DVS)isaneffectivemethodforlow-powerdesigns.However,traditionalDVSmethodshavetwodeficiencies.First,theyhaveaconservativesafetymarginwhichisnotnecessaryformostofthetime.Second,theyareexclusivelyconcernedwiththecriticalstageandignorethesignificantpotentialfreeslacktimeofthenoncriticalstage.Thesefactorsleadtoalargeamountofpowerwaste.Inthispaper,anovelpipelinestructurewithultra-lowpowerconsumptionisproposed.Itcutsoffthesafetymarginandtakesuseofthenoncriticalstagesatthesametime.Aprototypepipelineisdesignedin0.13mtechnologyandanalyzed.Theresultshowsthatalargeamountofenergycanbesavedbyusingthisstructure.Comparedwiththefixedvoltagecase,50%oftheenergycanbesaved,andwithrespecttothetraditionaladaptivevoltagescalingdesign,37.8%oftheenergycanbesaved.

简介：一面新奇互补金属氧化物半导体atto安培电流镜子(AACM)被建议它到达0.4aA的最小的还报导的当前的范围。这个电路的操作基于来源电压调整而不是有趣地阻止变在那些电路的通常要求的电压的用法的通常使用的门电压调整。建议电路有简单结构禁止消费1.5W的极其低的电源的大薄片区域消费。它因此是为极端低电源的最好的选择低电压(ULPLV)应用。由使用一种很简单的频率赔偿技术，它的带宽被拓宽到15.8kHz。在SMIC(生产国际公司的半导体)的模拟结果有Hspice的0.18m互补金属氧化物半导体技术被介绍表明建议当前的镜子的确认。

简介：A2×2cross/barpolymerelectro-optic(EO)routingswitchisproposed,whichiscomposedoftwopassivechannelwaveguidesandtwoactiveEOpolymermicroringswithbendingradiusofonly13.76μm.Detailedstructure,theoryandformulationareprovidedtocharacterizetheoutputpoweroftheswitch.Forobtainingfundamentalmodepropagation,smallbendinglossandphase-matchingbetweenchannelwaveguideandmicroringresonator(MRR)waveguide,thestructuralparametersareoptimizedunderthewavelengthof1550nm.Analysesandsimulationsonoutputpowerandoutputspectraindicatethataswitchingvoltageof5Visdesiredtorealizetheexchangebetweencrossstateandbarstate,thecrosstalkundercrossstateandthatunderbarstateareabout28.8dBand39.9dB,respectively,andtheinsertionlossesunderthesetwostatesareabout2.42dBand0.13dB,respectively.ComparedwithourfourEOswitchesreportedbefore,thisdevicepossessesultra-compactsizeof0.233mm×0.233mmaswellaslowcrosstalkandinsertionloss,andthereforeitcanserveasagoodcandidateforconstructinglarge-scaleopticalroutersorswitchingarraysinphotonicnetwork-on-chip(NoC).

简介：一新奇、紧缩、高度选择极端宽带(UWB)与一个狭窄的notched乐队一起的通带过滤器被介绍。除了有slotline的基本结构，多重模式的共鸣器(MMR)和微条喂线，这个新奇图案介绍在输入和输出之间的跨coupling喂线提高过滤器选择。设计严格地跟随理论并且验证了由电磁(他们)模拟和实验。另外，狭窄的notched乐队被嵌入一双裂口戒指共鸣器(SRR)以便拒绝可以防碍定义的联邦通讯委员会(FCC)的任何不希望得到的存在无线电信号介绍UWB乐队。由改变SRR的结构的参数，它能容易被调节到任何需要的频率。这个过滤器能集成于UWB通讯系统并且高效地从象无线本地区域网络(WLAN)那样的不希望得到的信号改进干扰免疫。

简介：我们建议一个新奇计划产生极端宽带(UWB)马甲信号脉搏基于在一个半导体的跨获得的调整(XGM)光放大器(SOA)。在计划，仅仅光来源和SOA被需要。因为仅仅有一波长，在产量马甲信号脉搏包括，没有时差在之间上面并且在脉搏下面在传播过程期间被介绍。由使用Optisystem7.0的软件，光力量，SOA水流，波长和输入的影响在产生马甲脉搏上表明脉搏宽度被模仿并且tudied数字地。结果证明当输入信号脉搏的脉搏宽度更大时，产量信号脉搏更好，并且对波长的变化感觉迟钝。另外，极端宽带的积极、否定的独轮脚踏车能被选择合适的光来源功率和SOA电流产生。