Ib hom tshiab ntawm terahertz multiplexer tau muab ob npaug rau cov ntaub ntawv muaj peev xwm thiab txhim kho 6G kev sib txuas lus nrog cov bandwidth tsis tau muaj dua thiab cov ntaub ntawv poob qis.
Cov kws tshawb fawb tau qhia txog qhov dav dav dav dav terahertz multiplexer uas ua rau ob npaug ntawm cov ntaub ntawv muaj peev xwm thiab coj cov kev hloov pauv hloov mus rau 6G thiab dhau mus. (Image Source: Getty Images)
Lwm tiam kev sib txuas lus wireless, sawv cev los ntawm terahertz thev naus laus zis, cog lus tias yuav hloov pauv cov ntaub ntawv xa mus.
Cov tshuab no ua haujlwm ntawm terahertz zaus, muab cov bandwidth tsis sib xws rau kev xa cov ntaub ntawv ceev ceev thiab kev sib txuas lus. Txawm li cas los xij, kom paub txog qhov muaj peev xwm no, cov kev cov nyom tseem ceeb yuav tsum tau kov yeej, tshwj xeeb tshaj yog nyob rau hauv kev tswj hwm thiab siv cov spectrum muaj txiaj ntsig zoo.
Ib qho kev nce qib hauv av tau hais txog qhov kev sib tw no: thawj zaug ultra-wideband integrated terahertz polarization (de) multiplexer pom tau hais tias ntawm lub substrate-dawb silicon platform.
Qhov kev tsim kho tshiab no tsom rau sub-terahertz J band (220-330 GHz) thiab lub hom phiaj los hloov kev sib txuas lus rau 6G thiab dhau mus. Cov cuab yeej ua tau zoo dua ob npaug ntawm cov ntaub ntawv muaj peev xwm thaum tswj cov ntaub ntawv poob qis, paving txoj hauv kev kom muaj txiaj ntsig zoo thiab txhim khu kev qha high-speed wireless networks.
Pab neeg tom qab lub sijhawm tseem ceeb no suav nrog xibfwb Withawat Withayachumnankul los ntawm University of Adelaide's School of Electrical and Mechanical Engineering, Dr. Weijie Gao, tam sim no tus kws tshawb fawb tom qab kawm tiav hauv Osaka University, thiab xibfwb Masayuki Fujita.
Xib fwb Withayachumnankul tau hais tias, "Lub tswv yim polarization multiplexer tso cai rau ntau cov ntaub ntawv xa mus ib txhij nyob rau hauv tib lub zaus band, ua tau zoo dua ob npaug ntawm cov ntaub ntawv muaj peev xwm." Tus txheeb ze bandwidth ua tiav los ntawm lub cuab yeej yog qhov tsis tau pom dua dhau los ntawm txhua qhov ntau zaus, sawv cev rau qhov kev dhia tseem ceeb rau kev sib xyaw ua ke.
Polarization multiplexers yog qhov tseem ceeb hauv kev sib txuas lus niaj hnub no vim tias lawv ua kom muaj ntau lub teeb liab los qhia tib lub zaus band, txhawb kev muaj peev xwm channel.
Cov cuab yeej tshiab ua tiav qhov no los ntawm kev siv conical directional couplers thiab anisotropic zoo nruab nrab cladding. Cov khoom no txhim kho polarization birefringence, ua rau muaj qhov sib txawv polarization extinction ratio (PER) thiab dav bandwidth - cov yam ntxwv tseem ceeb ntawm kev sib txuas lus zoo terahertz.
Tsis zoo li cov qauv tsim uas tso siab rau qhov nyuaj thiab zaus-raws li asymmetric waveguides, tus multiplexer tshiab siv anisotropic cladding nrog tsuas yog me ntsis zaus dependence. Txoj hauv kev no ua rau muaj kev cuam tshuam loj ntawm bandwidth muab los ntawm conical couplers.
Qhov tshwm sim yog ib feem ntawm qhov bandwidth ze rau 40%, qhov nruab nrab PER siab tshaj 20 dB, thiab qhov tsawg kawg nkaus qhov poob ntawm kwv yees li 1 dB. Cov kev ntsuas kev ua tau zoo no dhau los ntawm cov khoom siv kho qhov muag thiab microwave uas twb muaj lawm, uas feem ntau raug kev txom nyem los ntawm nqaim bandwidth thiab poob siab.
Pab pawg tshawb fawb kev ua haujlwm tsis yog tsuas yog txhim kho kev ua haujlwm ntawm terahertz systems tab sis kuj tseem ua haujlwm hauv paus rau lub sijhawm tshiab hauv kev sib txuas lus wireless. Dr. Gao tau sau tseg, "Qhov kev hloov tshiab no yog tus tsav tsheb tseem ceeb hauv kev qhib lub peev xwm ntawm kev sib txuas lus terahertz." Cov ntawv thov suav nrog cov lus txhais video streaming, augmented kev muaj tiag, thiab lwm tiam xov tooj ntawm tes xws li 6G.
Tsoos terahertz polarization tswj kev daws teeb meem, xws li orthogonal hom transducers (OMTs) raws li cov duab plaub hlau waveguides, ntsib cov kev txwv tseem ceeb. Hlau waveguides muaj kev nce ohmic poob ntawm cov zaus ntau dua, thiab lawv cov txheej txheem tsim khoom yog qhov nyuaj vim qhov yuav tsum tau ua kom nruj geometric.
Optical polarization multiplexers, suav nrog cov neeg siv Mach-Zehnder interferometers lossis photonic crystals, muaj kev sib koom ua ke zoo dua thiab qis dua tab sis feem ntau xav tau kev lag luam tawm ntawm bandwidth, compactness, thiab manufacturing complexity.
Directional couplers yog siv dav hauv cov tshuab kho qhov muag thiab yuav tsum muaj zog polarization birefringence kom ua tiav qhov loj me thiab siab PER. Txawm li cas los xij, lawv raug txwv los ntawm nqaim bandwidth thiab rhiab heev rau kev tsim khoom kam rau ua.
Tus tshiab multiplexer muab qhov zoo ntawm conical directional couplers thiab nruab nrab cladding zoo, kov yeej cov kev txwv no. Lub anisotropic cladding nthuav tawm qhov tseem ceeb birefringence, kom ntseeg tau siab PER thoob plaws lub dav bandwidth. Lub hauv paus ntsiab lus tsim qauv no qhia txog kev tawm mus los ntawm cov txheej txheem ib txwm muaj, muab kev daws teeb meem thiab ua tau zoo rau terahertz kev koom ua ke.
Kev sim validation ntawm lub multiplexer tau lees tias nws qhov kev ua tau zoo tshwj xeeb. Cov cuab yeej ua haujlwm tau zoo hauv 225-330 GHz ntau yam, ua tiav ib feem ntawm qhov bandwidth ntawm 37.8% thaum tuav PER siab dua 20 dB. Nws qhov loj me thiab kev sib raug zoo nrog cov txheej txheem tsim khoom ua rau nws tsim nyog rau ntau lawm.
Dr. Gao tau hais tias, "Qhov kev tsim kho tshiab no tsis yog txhim kho kev ua haujlwm ntawm terahertz kev sib txuas lus nkaus xwb tab sis kuj yog txoj hauv kev rau ntau lub zog thiab txhim khu kev qha high-speed wireless networks."
Cov kev siv peev xwm ntawm cov cuab yeej siv no txuas ntxiv tshaj qhov kev sib txuas lus. Los ntawm kev txhim kho kev siv spectrum, lub multiplexer tuaj yeem tsav kev nce qib hauv thaj chaw xws li radar, duab, thiab Internet ntawm Yam. "Nyob rau hauv ib xyoo caum, peb cia siab tias cov terahertz technologies yuav siv dav thiab kev koom ua ke nyob rau hauv ntau yam lag luam," xibfwb Withayachumnankul hais.
Lub multiplexer kuj tseem tuaj yeem ua ke nrog cov khoom siv ua ntej beamforming tsim los ntawm pab pawg, ua kom muaj kev sib txuas lus zoo tshaj plaws ntawm kev sib koom ua ke. Qhov kev sib raug zoo no qhia txog ntau yam thiab kev ua kom muaj peev xwm ntawm qhov ua tau zoo nruab nrab-clad dielectric waveguide platform.
Pab pawg cov kev tshawb fawb tshawb pom tau luam tawm nyob rau hauv phau ntawv Journal Laser & Photonic Reviews, hais txog lawv qhov tseem ceeb hauv kev nce qib photonic terahertz technology. Xibfwb Fujita tau hais tias, "Los ntawm kev kov yeej cov teeb meem kev lag luam tseem ceeb, qhov kev tsim kho tshiab no xav kom txhawb kev txaus siab thiab kev tshawb fawb hauv thaj chaw."
Cov kws tshawb fawb cia siab tias lawv txoj haujlwm yuav txhawb nqa cov ntawv thov tshiab thiab kev txhim kho thev naus laus zis ntxiv rau xyoo tom ntej, thaum kawg ua rau kev lag luam qauv thiab cov khoom lag luam.
Qhov multiplexer no sawv cev rau ib kauj ruam tseem ceeb rau hauv kev qhib lub peev xwm ntawm terahertz kev sib txuas lus. Nws teeb tsa tus qauv tshiab rau kev sib koom ua ke terahertz cov khoom siv nrog nws qhov kev ntsuas kev ua tau zoo uas tsis tau pom dua.
Raws li qhov kev thov rau high-speed, high-muaj peev xwm kev sib txuas lus tes hauj lwm tseem loj hlob, xws li innovation yuav ua si lub luag hauj lwm tseem ceeb nyob rau hauv shaping lub neej yav tom ntej ntawm wireless technology.
Post lub sij hawm: Dec-16-2024