Chingwe cha coaxial chimagwiritsidwa ntchito kutumiza mphamvu ya RF kuchokera ku doko limodzi kapena gawo limodzi kupita ku madoko / mbali zina za dongosolo.Chingwe chokhazikika cha coaxial chimagwiritsidwa ntchito ngati chingwe cha microwave coaxial.Mawaya amtunduwu nthawi zambiri amakhala ndi ma conductor awiri owoneka ngati cylindrical mozungulira ma axis wamba.Onse amasiyanitsidwa ndi zida za dielectric.Pafupipafupi, mawonekedwe a polyethylene amagwiritsidwa ntchito ngati dielectric, ndipo pama frequency apamwamba a Teflon amagwiritsidwa ntchito.
Mtundu wa chingwe cha coaxial
Pali mitundu yambiri ya chingwe cha coaxial kutengera kapangidwe ka kondakitala ndi njira zotetezera zomwe zimagwiritsidwa ntchito.Mitundu ya chingwe coaxial imaphatikizapo chingwe chokhazikika monga momwe tafotokozera pamwambapa komanso chingwe chodzaza mpweya, coaxial cable, ndi bi-wire shielded coaxial cable.
Zingwe zosinthika za coaxial zimagwiritsidwa ntchito pawailesi yakanema wolandila tinyanga zokhala ndi ma conductor akunja opangidwa ndi zojambulazo kapena zoluka.
Pa ma frequency a microwave, kondakitala wakunja ndi wokhazikika ndipo dielectric imakhala yolimba.Mu zingwe za coaxial zodzazidwa ndi mpweya, kondakita wapakati amapangidwa ndi insulator yopyapyala ya ceramic, komanso kugwiritsa ntchito polytetrafluoroethylene.Nayitrogeni wowuma atha kugwiritsidwa ntchito ngati zida za dielectric.
Mu coax yodziwika bwino, insulator yamkati imakwezedwa mozungulira wokonda wamkati.kuzungulira kokondakita wotetezedwa ndi kuzungulira chotchinga choteteza ichi.
Mu chingwe cha coaxial chotchinga pawiri, zigawo ziwiri zachitetezo nthawi zambiri zimaperekedwa popereka chishango chamkati ndi chishango chakunja.Izi zimateteza chizindikiro ku EMI ndi ma radiation aliwonse kuchokera ku chingwe chomwe chikukhudza machitidwe apafupi.
Coaxial mzere khalidwe impedance
Kulephera kwa chikhalidwe cha chingwe choyambira coaxial kungadziwike pogwiritsa ntchito njira iyi.
Zo = 138/sqrt(K) * Logi(D/d) Ohms
mu,
K ndiye kusinthasintha kwa dielectric kwa insulator pakati pa okonda amkati ndi akunja.D ndi mainchesi a kondakitala wakunja ndipo d ndi mainchesi a wokonda wamkati.
Ubwino kapena Ubwino wa Coaxial Cable
Zotsatirazi ndi zabwino kapena zabwino za chingwe cha coaxial:
➨ Chifukwa cha momwe khungu limakhudzira, zingwe zoyankhulirana zomwe zimagwiritsidwa ntchito pafupipafupi (> 50 MHz) zimagwiritsa ntchito zotchingira zamkuwa zapakati.Zotsatira za khungu ndi chifukwa cha zizindikiro zafupipafupi zomwe zimafalikira pamtunda wakunja wa conductor.Imawonjezera mphamvu yolimba ya chingwe ndikuchepetsa kulemera.
➨Chingwe cha Coaxial chimatsika mtengo.
➨ Kondakitala wakunja mu chingwe coaxial amagwiritsidwa ntchito kuti achepetse komanso kuteteza.Izi zimatheka pogwiritsa ntchito chojambula chachiwiri kapena choluka chotchedwa sheath (chotchedwa C2 mu Chithunzi 1).Jeketeyo imakhala ngati chishango cha chilengedwe ndipo imapangidwa kukhala chingwe chophatikizika cha coaxial ngati choletsa moto.
➨ Imakhala yosavuta kumva phokoso kapena kusokonezedwa (EMI kapena RFI) kuposa zingwe zopotoka.
➨Poyerekeza ndi zopindika, imathandizira kutumiza ma siginolo a bandwidth apamwamba.
➨Yosavuta kuyimba ndi kukulitsa chifukwa cha kusinthasintha.
➨Imaloleza kufala kwakukulu, chingwe cha coaxial chimakhala ndi zotchinga bwino.
Kuipa kapena Kuipa kwa Coaxial Cable
Zotsatirazi ndi kuipa kwa chingwe coaxial:
➨Kukula kwakukulu.
➨Kuyika mtunda wautali kumawononga ndalama zambiri chifukwa cha makulidwe ake komanso kuuma kwake.
➨ Popeza chingwe chimodzi chimagwiritsidwa ntchito potumiza ma siginoloji pa netiweki yonse, ngati chingwe chimodzi chalephera, netiweki yonse imatsika.
➨Chitetezo ndichodetsa nkhawa kwambiri chifukwa ndikosavuta kumvera chingwe cha coaxial pochithyola ndikuyika cholumikizira cha T (mtundu wa BNC) pakati pa ziwirizi.
➨Iyenera kukhazikitsidwa kuti isasokonezedwe.
Nthawi yotumiza: Dec-15-2023
