Intambo ye-coaxial isetyenziselwa ukuhambisa amandla e-RF ukusuka kwelinye izibuko okanye inxalenye ukuya kwamanye amazibuko/iinxalenye zenkqubo.Intambo ye-coaxial eqhelekileyo isetyenziswa njengomgca we-microwave coaxial.Olu hlobo locingo ludla ngokuba nabaqhubi ababini kwimilo ye-cylindrical ejikeleze i-axis eqhelekileyo.Zonke zahlulwe ngezinto zedielectric.Kwii-frequencies ezisezantsi, ifom ye-polyethylene isetyenziswe njenge-dielectric, kwaye kwii-frequencies eziphezulu izinto zeTeflon zisetyenziswa.
Uhlobo lwentambo ye-coaxial
Kukho iindlela ezininzi ze-coaxial cable ngokuxhomekeke kulwakhiwo lomqhubi kunye neendlela zokukhusela ezisetyenzisiweyo.Iindidi zentambo ye-coaxial zibandakanya intambo ye-coaxial eqhelekileyo njengoko ichazwe ngasentla kunye nentambo ye-coaxial ezaliswe yigesi, intambo ye-coaxial ecacileyo, kunye ne-bi-wire shielded coaxial cable.
Iintambo ze-coaxial eziguquguqukayo zisetyenziswa kusasazo lukamabonakude olufumana ii-eriyali ezineekhondaktha zangaphandle ezenziwe ngefoyile okanye ibraid.
Kwiifrikhwensi ze-microwave, i-conductor yangaphandle iqinile kwaye i-dielectric iya kuba yinto eqinile.Kwiintambo ze-coaxial ezizaliswe ngegesi, umqhubi weziko lenziwe nge-insulator ye-ceramic encinci, esebenzisa i-polytetrafluoroethylene.Initrogen eyomileyo ingasetyenziswa njengesixhobo sombane.
Kwi-coax echazwe, i-insulator yangaphakathi iphakanyiswe malunga nomqhubi wangaphakathi.ujikeleze i-conductor ekhuselekileyo kwaye ujikeleze esi singxobo sokhuselo sokhuselo.
Kwintambo ye-coaxial ephindwe kabini, iileya ezimbini zokhuselo zibonelelwa ngokuqhelekileyo ngokubonelela ngekhaka elingaphakathi kunye nekhuselo langaphandle.Oku kukhusela umqondiso kwi-EMI kunye nayiphi na i-radiation evela kwintambo echaphazela iinkqubo ezikufutshane.
Impedance yeempawu zomgca weCoaxial
I-impedance yempawu ye-coaxial cable esisiseko inokumiselwa ngokusebenzisa le fomula ilandelayo.
Zo = 138/sqrt(K) * Ilog(D/d) Ohms
ngaphakathi,
I-K yi-dielectric constant ye-insulator phakathi kwabaqhubi bangaphakathi nangaphandle.I-D yi-diameter ye-conductor yangaphandle kwaye u-d yi-diameter ye-conductor yangaphakathi.
Izinto eziluncedo okanye eziluncedo zeCoaxial Cable
Okulandelayo ziinzuzo okanye iingenelo zentambo ye-coaxial:
➨Ngenxa yesiphumo solusu, iintambo ze-coaxial ezisetyenziswa kusetyenziso lwamaza aphezulu (>50 MHz) zisebenzisa i-copper cladding ye-coaxial conductor.Umphumo wesikhumba sisiphumo sezibonakaliso eziphezulu zefrikhwensi ezisasazeka kumphezulu wangaphandle we-conductor.Yandisa amandla okuqina kwentambo kwaye inciphisa ubunzima.
➨Intambo yeCoaxial ixabisa kancinci.
➨Ikhondaktha yangaphandle kwintambo ye-coaxial isetyenziselwa ukuphucula ukuthomalalisa kunye nokukhusela.Oku kufezwa ngokusebenzisa i-foil yesibini okanye i-braid ebizwa ngokuba yi-sheath (etyunjwe i-C2 kwi-Figure 1).Ibhatyi isebenza njengesikhuselo sokusingqongileyo kwaye yenziwe kwintambo edibeneyo ye-coaxial njengento yokunqanda ilangatye.
➨ Ayichaphazeli kancinane kwingxolo okanye uphazamiseko (EMI okanye RFI) kuneentambo zokubhangqa ezijijekileyo.
➨Xa kuthelekiswa neperi ejijekileyo, ixhasa ukuhanjiswa komqondiso we-bandwidth ephezulu.
➨Kulula ukutsalela kunye nokwandisa ngenxa yokuba bhetyebhetye.
➨Ivumela isantya esiphezulu sothumelo, intambo ye-coaxial inezixhobo ezingcono zokukhusela.
Ukungalungi okanye ukungalungi kweCable Coaxial
Oku kulandelayo kukungalunganga kwentambo ye-coaxial:
➨ Ubungakanani obukhulu.
➨Ufakelo lomgama omde luxabisa kakhulu ngenxa yobunzima nokuqina kwayo.
➨ Ekubeni intambo enye isetyenziselwa ukuhambisa iimpawu kwinethiwekhi yonke, ukuba intambo enye iyasilela, yonke inethiwekhi iya kuhla.
➨ Ukhuseleko yinkxalabo enkulu njengoko kulula ukulalela intambo ye-coaxial ngokuyophula kwaye ufake i-T-connector (uhlobo lwe-BNC) phakathi kwezi zimbini.
➨ Kufuneka isekelwe ukuthintela ukuphazamiseka.
Ixesha lokuposa: Dec-15-2023
