Intambo ye-coaxial isetshenziselwa ukudlulisa amandla e-RF isuka embobeni eyodwa noma ingxenye iye kwezinye izimbobo/izingxenye zohlelo. Intambo ye-coaxial evamile isetshenziswa njengomugqa we-microwave coaxial. Leli fomu locingo ngokuvamile linamakhondaktha amabili asesimweni esiyisilinda eduze kwe-eksisi evamile. Zonke zihlukaniswe nge-dielectric material. Emazingeni aphansi, ifomu le-polyethylene lisetshenziswa njenge-dielectric, futhi kuma-frequencies aphezulu i-Teflon material isetshenziswa.
Uhlobo lwentambo ye-coaxial
Kunezinhlobo eziningi zekhebula le-coaxial kuye ngokwakhiwa komqhubi nezindlela zokuvikela ezisetshenzisiwe. Izinhlobo zamakhebula ama-coaxial zifaka ikhebula elivamile eliyi-coaxial njengoba kuchazwe ngenhla kanye nekhebuli e-coaxial egcwele igesi, ikhebula eliqinile eliyi-articulated, kanye nentambo ye-coaxial evikelekile.
Izintambo eziguquguqukayo ze-coaxial zisetshenziswa ekusakazeni kukamabonakude ezithola izinti ezinamakhondatha angaphandle enziwe nge-foil noma nge-braid.
Kumafrikhwensi e-microwave, i-conductor yangaphandle iqinile futhi i-dielectric izoqina. Ezintamboni ze-coaxial ezigcwele igesi, i-coaxial conductor yenziwe nge-insulator encane ye-ceramic, futhi isebenzisa i-polytetrafluoroethylene. I-nitrogen eyomile ingasetshenziswa njenge-dielectric material.
Ku-coax ecacisiwe, isivikelo sangaphakathi siphakanyiswa eduze komqhubi wangaphakathi. nxazonke ku-conductor ovikelekile futhi nxazonke zalo mgodla wokuvikela ovikelayo.
Kukhebuli ye-coaxial enezivikelo ezimbili, izendlalelo ezimbili zokuvikela ngokuvamile zihlinzekwa ngokuhlinzeka ngesihlangu sangaphakathi nesihlangu sangaphandle. Lokhu kuvikela isignali ku-EMI nanoma yimiphi imisebe evela kukhebuli ethinta amasistimu aseduze.
Isici somugqa we-coaxial impedance
Isici se-impedance ye-basic coaxial cable singanqunywa kusetshenziswa ifomula elandelayo.
Zo = 138/sqrt(K) * Ilogi(D/d) Ohms
phakathi,
I-K iyi-dielectric constant ye-insulator phakathi kwama-conductor angaphakathi nangaphandle. U-D uwububanzi bomqhubi wangaphandle futhi u-d uwububanzi bomqhubi wangaphakathi.
Izinzuzo noma izinzuzo zekhebula le-Coaxial
Okulandelayo izinzuzo noma izinzuzo zekhebula le-coaxial:
➨Ngenxa yomphumela wesikhumba, amakhebuli angama-coaxial asetshenziswa kumafrikhwensi aphezulu (>50 MHz) asebenzisa ukuvala ithusi kokhondatha omaphakathi. Umphumela wesikhumba uwumphumela wezimpawu zemvamisa ephezulu ezisakazeka endaweni engaphandle yomqhubi. Yandisa amandla okudonsa ekhebula futhi inciphisa isisindo.
➨Ikhebula le-coaxial libiza kancane.
➨Ikhondatha yangaphandle kukhebuli ye-coaxial isetshenziselwa ukuthuthukisa ukuncishiswa nokuvikela. Lokhu kufezwa ngokusebenzisa i-foil yesibili noma i-braid ebizwa ngokuthi i-sheath (eqokwe i-C2 kuMfanekiso 1). Ijazi lisebenza njengesihlangu sezemvelo futhi lenziwa ikhebula le-coaxial ebalulekile njenge-flame retardant.
➨Akulula ukuthola umsindo noma ukuphazamiseka (EMI noma i-RFI) kunezintambo zokumatanisa ezisontekile.
➨Uma iqhathaniswa nokupheya okusontekile, isekela ukudluliswa kwesignali yomkhawulokudonsa ophezulu.
➨Kulula ukufaka izintambo nokunwetshwa ngenxa yokuvumelana nezimo.
➨Ivumela izinga eliphezulu lokudlulisela, ikhebula le-coaxial linempahla yokuvikela engcono.
Ukubi noma Ububi bekhebula le-Coaxial
Okulandelayo yibubi bentambo ye-coaxial:
➨Usayizi omkhulu.
➨Ukufakwa kwebanga elide kuyabiza ngenxa yokuqina nokuqina kwayo.
➨Njengoba ikhebula elilodwa lisetshenziselwa ukudlulisa amasignali kuyo yonke inethiwekhi, uma ikhebuli eyodwa ihluleka, yonke inethiwekhi izokwehla.
➨Ukuvikeleka kuyinkinga enkulu njengoba kulula ukulalela ikhebuli ekhoaxial ngokuyiphula bese ufaka isixhumi esingu-T (uhlobo lwe-BNC) phakathi kwakho kokubili.
➨Kufanele ibekwe phansi ukuze ivimbele ukuphazamiseka.
Isikhathi sokuthumela: Dec-15-2023
