A Review on Terahertz Communications Research

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1、JInfraredMilliTerahzWaves(2011)32:143–171DOI10.1007/s10762-010-9758-1INVITEDREVIEWARTICLEAReviewonTerahertzCommunicationsResearchThomasKleine-Ostmann&TadaoNagatsumaReceived:26August2010/Accepted:10December2010/Publishedonline:11January2011#SpringerScience+

2、BusinessMedia,LLC2011AbstractTheincreasingdemandofunoccupiedandunregulatedbandwidthforwirelesscommunicationsystemswillinevitablyleadtotheextensionofoperationfrequenciestowardthelowerTHzfrequencyrange.Highercarrierfrequencieswillallowforfasttransmissionofhu

3、geamountsofdataasneededfornewemergingapplications.Despitethetremendoushurdlesthathavetobeovercomewithregardtosourcesanddetectors,circuitandantennatechnologyandsystemarchitecturetorealizeultrafastdatatransmissioninascenariowithextensivetransmissionloss,anew

4、areaofresearchisbeginningtoform.InthisarticlewegiveanoverviewofemergingtechnologiesandsystemresearchthatmightleadtoubiquitousTHzcommunicationsystemsinthefuture.KeywordsTerahertzcommunications.Ultra-broadbandshort-rangeindoorcommunicationsystems.Long-rangeo

5、utdoorcommunicationsystems.THzmodulators.Raytracing.Channelmodelling.Uni-travelling-carrierphotodiodes.Schottkybarrierdiodes.THzantennas.THztransmitters.THzreceivers1IntroductionOursocietybecomesincreasinglydependentoninformationtransmissionandprocessing.T

6、heunprecedentedgrowthinthedevelopmentanddeploymentofwirelesscommunicationsystemsforamultitudeofnewapplicationsisaccompaniedbyanincreasingneedforhigherdatarates.Wirelessdatarateshavebeenincreasing2-foldevery18monthsoverthelastthreedecadesandthespeedofnomadi

7、ctrafficisapproachingthecapacitiesofwire-linecommunicationsystems[1].ExtrapolatingtheexponentialgrowthofthewirelesscapacityseeninthepastleadstotheunambiguousconclusionthatdataratesofaboutafewtensofT.Kleine-Ostmann(*)Physikalisch-TechnischeBundesanstalt(PTB

8、),Bundesallee100,38116Braunschweig,Germanye-mail:thomas.kleine-ostmann@ptb.deT.NagatsumaOsakaUniversity,1-3Machikaneyama,Toyonaka,Osaka560-8531,Japan144JInfraredMilliTerahzWaves(2011)32:143–171Gbit/swillbenee