Coaxial chingwe (pambuyo pake amatchedwa "coax") ndi chingwe chomwe chimakhala ndi ma coaxial ndi insulated cylindrical metal conductors kuti apange unit yoyambira (coaxial pair), kenako mawiri awiri kapena angapo coaxial.Zakhala zikugwiritsidwa ntchito potumiza zizindikiro za data ndi makanema kwa nthawi yayitali.Ndi imodzi mwazofalitsa zoyamba zothandizira 10BASE2 ndi 10BASE5 Efaneti, ndipo zimatha kukwaniritsa kufala kwa 10 Mb/s kwa 185 metres kapena 500 metres motsatana.Mawu oti "coaxial" amatanthauza kuti chowongolera chapakati cha chingwe ndi chishango chake chotchinga chimakhala ndi nsonga yofanana kapena chapakati.Zingwe za coaxial zimatha kukhala ndi zigawo zingapo zotchingira, monga zingwe zotchinga zinayi.Chingwechi chimakhala ndi zigawo ziwiri zotchingira, ndipo gawo lililonse lachitetezo limapangidwa ndi zojambulazo za aluminiyamu zokutidwa ndi mawaya.Chotchinga ichi cha chingwe cha coaxial chimapangitsa kuti ikhale ndi mphamvu zolimbana ndi ma electromagnetic kusokoneza ndipo imatha kutumiza ma siginecha apamwamba patali.Pali mitundu yambiri ya zingwe za coaxial zomwe zimathandizira ntchito zambiri zamaluso, monga mauthenga a satana, mafakitale, asilikali ndi ntchito zapamadzi.Mitundu itatu yodziwika bwino ya zingwe zosagwirizana ndi mafakitale ndi RG6, RG11 ndi RG59, zomwe RG6 imagwiritsidwa ntchito kwambiri mu CCTV ndi CATV m'mabizinesi.Kondakitala wapakati wa RG11 ndi wandiweyani kuposa RG6, zomwe zikutanthauza kuti kutayika kwake ndikotsika komanso mtunda wotumizira ma siginecha nawonso ndi wautali.Komabe, chingwe chokulirapo cha RG11 ndichokwera mtengo kwambiri komanso chosasunthika, chomwe chimapangitsa kuti chisakhale choyenera kutumizidwa m'mapulogalamu amkati, koma oyenera kuyika panja mtunda wautali kapena maulalo owongoka amsana.Kusinthasintha kwa RG59 ndikwabwino kuposa kwa RG6, koma kutayika kwake kuli kwakukulu, ndipo sikumagwiritsidwa ntchito kawirikawiri m'mapulogalamu ena kupatulapo mavidiyo a analogi otsika, otsika kwambiri (makamera owonera kumbuyo m'magalimoto) okhala ndi mtunda waufupi komanso wochepa. malo kagawo.Kulepheretsa kwa zingwe za coaxial kumasiyananso - nthawi zambiri 50, 75, ndi 93 Ω.Chingwe cha coaxial cha 50 Ω chimakhala ndi mphamvu yayikulu yopangira mphamvu ndipo chimagwiritsidwa ntchito kwambiri potumiza mawayilesi, monga zida zamawayilesi amateur, wailesi ya boma (CB) ndi walkie-talkie.Chingwe cha 75 Ω chimatha kusunga bwino mphamvu ya siginecha ndipo chimagwiritsidwa ntchito makamaka kulumikiza zida zosiyanasiyana zolandirira, monga zolandila pa TV (CATV), ma seti apamwamba a kanema wawayilesi ndi zojambulira makanema apa digito.93 Ω coaxial chingwe chinagwiritsidwa ntchito mu IBM mainframe network m'ma 1970 ndi koyambirira kwa 1980s, ndi mapulogalamu ochepa komanso okwera mtengo.Ngakhale kuti 75 Ω coaxial cable impedance imapezeka kawirikawiri m'mapulogalamu ambiri masiku ano, ziyenera kukumbukiridwa kuti zigawo zonse za chingwe cha coaxial ziyenera kukhala ndi zolepheretsa zomwezo kuti zisawonongeke mkati mwa malo ogwirizanitsa zomwe zingayambitse kutayika kwa chizindikiro ndi kuchepetsa khalidwe la kanema.Chizindikiro cha digito 3 (DS3) chomwe chimagwiritsidwa ntchito potumiza mauthenga a ofesi yapakati (yomwe imadziwikanso kuti T3 mzere) imagwiritsanso ntchito zingwe za coaxial, kuphatikizapo 75 Ω 735 ndi 734. Kutalika kwa chingwe cha 735 ndi mamita 69, pamene ya 734 chingwe ndi mpaka 137 mamita.Chingwe cha RG6 chitha kugwiritsidwanso ntchito potumiza ma siginecha a DS3, koma mtunda wofikira ndi waufupi.
Mapangidwe a DB ali ndi seti zonse za chingwe cha coaxial ndi msonkhano, zomwe zingathandize makasitomala kuphatikiza machitidwe awo.Chonde dinani ulalo pansipa kuti musankhe malonda.Gulu lathu lazogulitsa limakhalapo nthawi zonse chifukwa cha inu.
Nthawi yotumiza: Jan-17-2023