Inqubo Yokukhiqiza Ikhebula Yezinhlelo Zokuxhumana Ngesathelayithi
Izinhlelo zokuxhumana ngesathelayithi zithembele ekudlulisweni kwesignali okuvamise kakhulu okumele kube okuzinzile, okunembile, nokungaphazanyiswa. Ngemuva kwalokhu kusebenza kukhona ingxenye ebalulekile evame ukunganakwa: izintambo. Izintambo zezinhlelo zokuxhumana ngesathelayithi azizona nje "izixhumi" phakathi kwamadivayisi, kodwa kunalokho ziyimidiya yokudlulisa okumele ibe nezici ezithile zikagesi, ukulahleka okuphansi, ukuvikela okuqinile, kanye nokumelana nezimo ezimbi kakhulu. Lesi sihloko sixoxa ngenqubo yokukhiqiza izintambo evame ukusetshenziswa ezinhlelweni zokuxhumana ngesathelayithi—kusukela ekukhetheni izinto kuya ekulawulweni kwekhwalithi ngaphambi kokuba intambo imenyezelwe ukuthi ifanele ukusetshenziswa.
1. Izidingo Zobuchwepheshe Zezintambo Ekuxhumaneni Kwesathelayithi
Izintambo ezingqalasizinda zesathelayithi zivame ukusetshenziselwa iziteshi zomhlaba, ama-antenna e-parabolic, amadivayisi e-radio frequency (RF), ama-LNB/LNA, ama-HPA/BUC, kanye nama-modem kanye namadivayisi okuqapha. Izinhlobo zekhebula ezisetshenziswa kakhulu yizintambo ze-coaxial futhi, kwezinye izingxenye zamanethiwekhi edatha/telemetry, izintambo ze-fiber optic. Endleleni ye-RF phakathi kwe-antenna kanye ne-amplifier, izintambo ze-coaxial ezisebenza kahle kakhulu ziyisinqumo esiyinhloko ngoba zingathwala izimpawu zemvamisa ephezulu nge-impedance elawulwayo (ngokuvamile ama-ohms angu-50 noma ama-ohms angu-75) futhi zihlinzeke ngesivikelo ekuphazamisekeni kwe-electromagnetic.
Ikhebula elihle lokuxhumana ngesathelayithi ngokuvamile liyadingeka ukuze libe nalokhu:
– Ukulahlekelwa okuphansi kokufakwa kumaza okusebenza (i-L-band, i-S-band, i-C-band, i-Ku-band, i-Ka-band, kuye ngohlelo).
– I-VSWR Encane (Isilinganiso Samagagasi Aqinile E-Voltage) njengesibonakaliso sokufanisa okuhle kwe-impedance.
– Ukusebenza kahle kokuvikela ukuvimbela ukuvuza kwemisebe kanye nokuphazamiseka kwangaphandle.
– Isimo sezulu kanye nokumelana ne-UV (ukufakwa ngaphandle) kanye nokuqina ngokumelene nokushintsha kwezinga lokushisa.
– Ukuthembeka kwemishini njengokuqina kokudonsa, ukuguquguquka, kanye nokumelana nokudlidliza.
2. Ubunjiniyela Nokuklama
Inqubo yokukhiqiza iqala isikhathi eside ngaphambi kokuba ifektri iqale. Ithimba lobunjiniyela lichaza imininingwane ngokusekelwe ezidingweni zesistimu: uhlobo lwekhebula, impedance, ububanzi bemvamisa, ububanzi, uhlobo lomqhubi, izinto ze-dielectric, uhlobo lokuvikela (i-foil, i-braid, noma inhlanganisela), kanye nohlobo lwejakethi (i-PVC, i-PE, i-LSZH, i-fluoropolymer, njll.). Lesi sigaba siphinde sicabangele amazinga emboni kanye nezidingo zesitifiketi, njengokuhambisana nezindinganiso zokuphepha emlilweni, ukumelana namakhemikhali, noma amazinga athile okusebenza kwe-RF.
Imininingwane yomklamo iphinda inqume ukubekezelelana okuqinile kakhulu. Kumakhebula e-RF coaxial, izinguquko ezincane kububanzi be-conductor noma be-dielectric zingashintsha i-impedance futhi zandise ukulahlekelwa, okwenza ukulawula inqubo kube yisihluthulelo.
3. Ukukhethwa Nokulungiswa Kwezinto Zokusetshenziswa
Izinto zokusetshenziswa eziyinhloko zekhebula le-coaxial zifaka:
1. Umqhubi ophakathi: ngokuvamile ithusi eliqinile noma eligobile (Cu), ngezinye izikhathi ithusi elifakwe isiliva ukuze lisebenze kahle kakhulu noma lisebenzise izidingo ezikhethekile. Kwezinye izinhlelo zokusebenza, insimbi efakwe ithusi (CCS) isetshenziselwa ukwandisa amandla omshini.
2. I-Dielectric: ingaba yi-PE (i-polyethylene), i-PE foam (efakwe i-foam ukuze kuncishiswe i-dielectric constant), i-PTFE/FEP (i-fluoropolymer) yokushisa okuphezulu nokulahlekelwa okuphansi.
3. Isivikelo: ungqimba lwe-aluminium foil kanye/noma i-copper braid. Inhlanganisela ye-foil kanye ne-braid ivame ukusetshenziselwa ukuvikela kangcono.
4. Ijakethi yangaphandle: I-PE yangaphandle (emelana ne-UV nesimo sezulu), i-PVC yokusetshenziswa okuthile ngaphakathi, noma i-LSZH ezindaweni ezidinga ukukhishwa kwentuthu okuphansi ngesikhathi somlilo.
Ngaphambi kokungena ekukhiqizweni, lezi zinto zihlolwa okokuqala: ubumsulwa bethusi, ububanzi bentambo, izakhiwo zemishini, kanye nokuhlolwa kwezinto ukuqinisekisa ukuhambisana nemininingwane.
4. Inqubo Yokudweba Nokunamathisela Izintambo
Uma ifektri ikhiqiza ama-conductor ayo, ithusi elingaphekiwe lidonswa ngochungechunge lwama-dies ukuze kufezwe ububanzi obufunekayo. Le nqubo ibizwa ngokuthi ukudweba ngocingo. Ngemva kokudweba, ithusi lingaba nzima ngenxa yokuqina komsebenzi, ngakho-ke liyashiswa (ukushisa okulawulwayo) ukuze kubuyiselwe ukuguquguquka kanye nokusebenza kahle.
Kuma-conductor abambekile, izintambo ezincane ezivela ekudonsweni ziyasontwa (ziboshwe) ukuze ikhebula liguquguquke futhi limelane nokuphuka ngesikhathi sokufakwa.
5. I-Dielectric Extrusion: Ukwakha I-Cable Core
Isinyathelo esilandelayo ukugqoka umqhubi ophakathi nge-dielectric usebenzisa inqubo yokukhipha. Umshini wokukhipha ufudumeza i-pellet ye-polymer (isb., i-PE noma i-PTFE) bese uyiphoqa ukuthi idlule kudayi, uyigoqe ngokugxila. Kumakhebula e-RF, ukugxila kubalulekile: i-dielectric kumele ibe phakathi nendawo ukuze igcine ukuqina okuzinzile nokunciphisa ukungalingani kokusabalala kwesignali.
Ama-dielectric e-foam asebenzisa indlela yokwenza i-foam ngegesi noma enye into ukuze adale isakhiwo esincane esingenalutho. Ukufaka i-dielectric e-foam kwehlisa i-dielectric constant, okuvame ukuholela ekulahlekelweni okuphansi kanye nesivinini esiphezulu sokusabalala kwesignali.
Ngemva kokukhipha, i-core yekhebula ipholiswa ngebhavu lokupholisa (umkhombe wamanzi) kuyilapho ubukhulu bayo bulawulwa nge-laser sensor noma i-online diameter gauge.
6. Ukufakwa Kwesihlangu: I-Foil kanye ne-Braid
Uma i-core yekhebula isivele yakhekile, isivikelo siyafakwa. Kunezindlela eziningana ezivamile zokucushwa:
– Isivikelo se-foil (itheyiphu): i-aluminium tape (ngokuvamile ene-glue noma i-laminated backing) egoqwe ngokuzungeza noma ngobude izungeze i-dielectric. I-foil iyasebenza kuma-frequency aphezulu futhi inikeza cishe ukumbozwa okugcwele.
– Isivikelo sokuluka: ucingo lwethusi olulukiwe luzungeze ungqimba lwefoyili noma ngqo ku-dielectric. Ukuluka kwandisa amandla okusebenza futhi kuhlinzeka ngesivikelo esengeziwe, ikakhulukazi ekuphazamisekeni okuyinkimbinkimbi kwe-electromagnetic.
Ngezidingo zesathelayithi ezibucayi, isihlangu esikabili (i-foil + i-braid) noma ngisho nesihlangu esiphindwe kathathu/esine-quad sivame ukukhethwa kuye ngezindinganiso zokufakwa kanye nendawo yokuphazamiseka.
Ukumbozwa kwe-braid kulawulwa ngokuqinile, isibonelo, ku-70%, 85%, noma >90%. Ukumbozwa okuphezulu kuvame ukuthuthukisa ukuvikela, kodwa futhi kwandisa izindleko zekhebula nokuqina.
7. Ukukhishwa Kwejakhethi Yangaphandle
Isigaba sokugcina ekwakhekeni kwekhebula ngokomzimba ukukhishwa kwejakethi yangaphandle. Ijakethi ivikela ikhebula ekukhungathekeni, umswakama, amakhemikhali, ukuchayeka ku-UV, kanye nomonakalo wemishini. Ekusetshenzisweni kwangaphandle eziteshini zomhlaba, ijakethi ye-PE engamelana ne-UV ivame ukusetshenziswa. Ekufakweni kwangaphakathi lapho ukuphepha komlilo kubalulekile, i-LSZH ivame ukusetshenziselwa ukunciphisa intuthu kanye namagesi agqwalisayo ngesikhathi sokushisa.
Kulesi sigaba ungangeza:
- Isithasiselo se-UV stabilizer
– Okubambezela ilangabi
– Ukuvimba amanzi (kuvimbela ukusabalala kwamanzi) emiklamo ethile
– Ukuvikela (ungqimba olwengeziwe oluvikelayo ngesimo sensimbi/itheyiphu ye-aluminium noma ukuluka) uma ikhebula ligqitshwe noma lisendaweni evame ukushayisana
Ngemva kokuba ijakethi selikhishiwe, ikhebula liyapholiswa futhi bese ligoqwa (lithathwe) libekwe esigubhini esinokulawula ukucindezeleka ukuze isimo sekhebula siqine futhi singashintshi.
8. Ukuphrinta, Ukumaka kanye Nokuhlonza
Amakhebula abe esephawulwa ngohlobo lwekhebula, inombolo yebhetshi, umenzi, usayizi, uphawu olujwayelekile, kanye nolwamamitha. Lokhu kumakwa kubalulekile ekulandeleni uma kwenzeka izinkinga zasensimini. Emaphrojekthini abalulekile okuxhumana ngesathelayithi, ukulandelela kwenza kube lula uphenyo olusheshayo—isibonelo, ukunquma ukuthi ikhebula livela kuliphi ibhetshi nokuthi yiziphi izilinganiso zokukhiqiza ezisetshenzisiwe.
9. Ukulawulwa Kwekhwalithi kanye Nokuhlolwa Kukagesi kwe-RF
Ngaphambi kokuba zithunyelwe, izintambo zidlula ochungechungeni lokuhlolwa:
1. Ukuhlolwa kobukhulu nokubonakalayo
- Ububanzi bomqhubi, i-dielectric, isihlangu, kanye nejazi
- Ukugxila kanye nokuma okuqondile
– Amaphutha ebusweni, imifantu, noma ukungcola
2. Ukuhlolwa okuyisisekelo kukagesi
– Ukumelana kwe-DC komqhubi
– Ukumelana nokushisa
– Ukuhlolwa kwe-Hi-pot (ukuhlolwa kwe-voltage yokuqhekeka) ukuqinisekisa ukuvikelwa okuphephile kokushisa
3. Ukuhlolwa kwesici se-RF
- Impedance ephawulekayo (50/75 ohms) kanye nokubekezelelana kwayo
- Ukulahlekelwa/ukuncishiswa kokufakwa ngobude ngesikhathi esithile
- Ukulahlekelwa kwembuyiselo kanye/noma i-VSWR
– Ukusebenza kahle kokuvikela/ukuvuza (ikakhulukazi ezindaweni ezithinteka kakhulu)
4. Ukuhlolwa kwemishini kanye nemvelo
- Ukuhlolwa kokuqiniswa nokunwebeka kwejakethi
- Ukuhlolwa kokuguquguquka/ukugoba
- Ukuhlolwa kwezinga lokushisa (ukujikeleza kokushisa)
- Ukuhlolwa kokumelana ne-UV kanye nomswakama kwezintambo zangaphandle
Imiphumela yokuhlolwa iqoshwa kudokhumenti yekhwalithi futhi, kumaphrojekthi athile, kunamathiselwe isitifiketi sokuhlolwa (umbiko wokuhlolwa) esakha ingxenye yombhalo wokudluliselwa.
10. Ukupakishwa, Ukugcinwa, Nokusatshalaliswa
Ngemva kokudlula ukuhlolwa, ikhebula lifakwa ezigubhuni noma ezitsheni zokudonsa ngokuya ngobude obuhleliwe. Ukupakisha kumele kuvimbele ukuguquka, ukungena kwamanzi, kanye nomonakalo ngesikhathi sokuthunyelwa. Ukugcinwa nakho kuqinile: izinga lokushisa lendlu yokugcina impahla, umswakama, kanye nezinqubo zokufaka izigubhu kucatshangelwa ngokucophelela ukuvimbela ukuguga kwangaphambi kwesikhathi kwejazi kanye nesimo sekhebula.
Esigabeni sokusabalalisa, abakhiqizi noma abahlanganisi bavame ukufaka izincomo zokufaka: irediyasi encane yokugoba, amandla aphezulu okudonsa, kanye nokuphela kwesixhumi okufanele. Lokhu kubalulekile ngoba ngisho nekhebula elingcono kakhulu lingenza kabi uma lifakwe ngendlela engafanele, ngezixhumi ezingahambisani, noma uma isivikelo siphuliwe ngesikhathi sokuphela.
Isiphetho
Inqubo yokukhiqiza ikhebula lezinhlelo zokuxhumana ngesathelayithi iwuchungechunge lwemisebenzi edinga ukunemba okuphezulu: kusukela ekwakhiweni kwe-impedance kanye nokukhethwa kwezinto, ukwakhiwa kwe-conductor kanye ne-dielectric, ukuvikela, kuya ekukhishweni kwejakethi kanye nokuhlolwa kwe-RF okuqinile. Ngenxa yokuthi izinhlelo zesathelayithi zisebenza kumaza aphezulu futhi ngokuvamile ezindaweni eziyinselele, ikhwalithi yekhebula ithinta ngqo ukuzinza kwezixhumanisi, ukunciphisa umsindo, kanye nokusebenza kahle kokudlulisa amandla e-RF. Ngokulawulwa kwekhwalithi okuhlelekile kanye nomklamo ofanele ukusetshenziswa, izintambo zingaba yizingxenye ezinokwethenjelwa ezigcina ukusebenza kahle kokuxhumana ngesathelayithi isikhathi eside.
Uma ufisa, ngingahlela lesi sihloko ukuze siqonde ngqo ikhebula le-coaxial le-L-band leziteshi zomhlaba, ikhebula le-waveguide, noma ikhebula le-fiber optic le-backbones yenethiwekhi yesathelayithi, eligcwele izibonelo zezindinganiso zokuhlola kanye namapharamitha ajwayelekile.
