Amakhebula e-RF, njengendlela eyinhloko yokudlulisela amasignali{0}}emvamisa ephezulu, adlala indima engenakuthathelwa indawo kwezokuxhumana, i-aerospace, ukusakaza, nokuhlola nokukala. Izici zabo zobuchwepheshe zithinta ngokuqondile ubuqotho besignali, ukwethembeka kwesistimu, nokuvumelana nezimo ezinhlelweni zobunjiniyela. Lesi sihloko sichaza ngokuhlelekile izici zobuchwepheshe eziwumongo zezintambo ze-RF ngokombono wokusebenza kukagesi, izakhiwo zokukhanda, ukuguquguquka kwemvelo, kanye nezimo ezivamile zohlelo lokusebenza.
I. Ukusebenza Okuhle Kakhulu Kagesi: Ukulahlekelwa Okuphansi Nokuzinza Okuphezulu
Ukucaciswa okuyinhloko kobuchwepheshe kwezintambo ze-RF ukusebenza kahle kokudlulisa isignali kumafrikhwensi aphezulu. Ukulahlekelwa okuphansi kungenye yezinzuzo zabo eziyinhloko. Ngokuthuthukisa okokusebenza kwekhondatha (okufana komoyampilo-njengethusi lamahhala noma isiliva{3}}ithusi elipulitiwe), ukwahlukanisa (okufana ne-polytetrafluoroethylene (PTFE) noma i-polyethylene eqinile), kanye nedizayini yesakhiwo sokuvikela, ukuncishiswa kokudlulisela{4}}amasignali amaza aphezulu (imvamisa ngokuvamile kungagcinwa kumazinga aphansi we-GHz angu-1 ukusuka ku-MHz eyikhulu ukuya kumazinga aphansi kakhulu) Isibonelo, amakhebuli e-semi{7}}aqinile angama-coaxial angazuza ukulahlekelwa okuphansi njengo-0.5 dB/imitha kubhendi ye-18 GHz.
Ukufanisa i-impedance yesici kungenye ipharamitha eyisihluthulelo, enamanani ajwayelekile afaka u-50Ω (asetshenziswa ekudluliselweni kwamandla nasezinhlelweni zokuhlola) kanye no-75Ω (okuvamile ekusakazeni nakumabonakude). Ukubekezelela okuqinile kwe-impedance (isb, ±1%) kuvimbela ngempumelelo ukuboniswa kwesignali nokuqinisekisa ukudluliswa kwamandla okuphumelelayo. Ngaphezu kwalokho, ukusebenza kahle kokuvikela kufinyelelwa-ngobuningi be-mesh elukiwe ngesendlalelo (njengethusi elithayiwe noma ingxubevange yesiliva) noma izakhiwo eziyinhlanganisela ye-aluminium foil, ezinciphisa ukuvikela okujwayelekile okudlula -90dB, kucindezela ngempumelelo ukuphazamiseka kukazibuthe (EMI) nokuvuza kwe-RF.
II. Ukunemba Komshini: Ukulinganisa Ukuguquguquka Nokuqina
Idizayini yemishini yezintambo ze-RF kufanele ilinganisele izidingo zokudlulisela isignali nezimo zangempela zokufakwa. Ngokusekelwe ezimfuneko zokuvumelana nezimo, zingahlukaniswa njengezintambo-eziqinile eziqinile (kusetshenziswa i-conductor yangaphandle yeshubhu yethusi eqinile egcina i-geometry engaguquki ngemva kokugoba), izintambo-eziguqukayo kalula ({2}}zisebenzisa i-conductor yangaphandle ephothiweyo enezintambo eziningi zethusi ezicolekile ukuze kuzuzwe ukugoba okulawulwayo), kanye nezintambo eziguquguqukayo ezivame ukunyakaza (i-flexible conductor).
Ukukhethwa kwe-insulation medium kuthinta ngokuqondile izici ezibonakalayo zekhebula. Isibonelo, i-PTFE, enezici zayo ze-dielectric eziphansi kakhulu (cishe u-2.1) nezici zokushisa ezizinzile (-55℃kuya ku-+260℃), ifanele ukusetshenziswa ezindaweni ezidlulele. I-polyethylene enwetshiwe, ngakolunye uhlangothi, inciphisa ukuncishiswa kwesignali ngokwehlisa ukuminyana kwe-dielectric ngenkathi igcina isisindo esiphansi. Izinto ezisetshenziswa emgodleni wangaphandle (njenge-polyvinyl chloride (PVC), i-polyurethane (TPU), noma ama-fluoropolymers) ziqhubeka zinikeza isivikelo ekuqhumeni, kuwoyela, noma esimweni sezulu.
III. Idizayini Ethuthukisiwe Yokuguquguquka Kwezemvelo
Izintambo ze-RF-zezinga lezimboni nezempi kumele zimelane nezinselele eziyinkimbinkimbi zemvelo. Ukuqina kwezinga lokushisa kufinyelelwa ngokukhetha{2}}izinga lokushisa eliphezulu-izinto zokugqumisa ezingazweli (njenge-FEP noma i-ceramic-egcwele i-PTFE). Eminye imikhiqizo ingagcina ukusebenza kusuka -ku-70℃kuya ku-+400℃. Ukumelana nomswakama nokugqwala kuncike ekwakhekeni kokuvala komgodla (okufana ne-aluminium eshiselwe ucwecwe + ingcina encibilikayo eshisayo) noma okokunamathela okukhethekile (okufana ne-polyimide) ukuvimbela ukungena komswakama kanye nokonakaliswa kwe-insulation.
Ukuze kuvikelwe ukucindezeleka komshini, amakhebuli ezikhali athuthukisa ukuminyanisa namandla aqinile ngokungezwa komluko wensimbi engagqwali noma i-spiral steel tape, okuwenza afanelekele ukufakwa ngaphansi komhlaba noma{0}}ekuhambeni kwemoto. Ngaphezu kwalokho,{2}}intuthu ephansi enguziro{3}}i-halogen (LSZH) izinto zokushelela zihlangabezana nezimfuneko zokuphepha komlilo zezokuthutha zikaloliwe kanye nezicelo zasolwandle.
IV. Izicelo Ezijwayelekile Namaphuzu Abalulekile Wokukhetha
Izici zobuchwepheshe zezintambo ze-RF zinquma izimo zohlelo eziqondisiwe:
Iziteshi eziyisisekelo zokuxhumana namasistimu e-radar: Izintambo eziqinile-eziqinile ezinokulahleka okuphansi namandla amakhulu (njengochungechunge lwe-LMR) zikhethwa ukuze kuqinisekiswe ukudluliswa okuzinzile kwamasignali amaza ama-millimeter-(njengebhendi engu-28 GHz 5G).
Ilabhorethri nokuhlola nokukala: -amakhebuli avumelana nezimo anembayo aphezulu (afana ne-RG-316) asetshenziselwa ukulinganisa okokusebenza okufana nama-vector network analyzers (VNAs) ngenxa yokuphendula kwesigaba esizinzile.
Isathelayithi ne-aerospace: Amakhebuli e-Ultra-elula (njengama-micro-coaxial structures) ahlanganiswe ne-radiation{2}}izinto ezikwazi ukumelana ne-radiation ahlangabezana nezimfuneko zemvelo emkhathini eyedlulele.
Lapho ukhetha ikhebula, cabangela ububanzi befrikhwensi, umthamo wamandla, irediyasi yokugoba, kanye nemikhawulo yezindleko. Isibonelo, izinhlelo zokusebenza-zemvamisa ephezulu zidinga ukunakwa kwe-cable's voltage standing wave ratio (VSWR), kuyilapho izinhlelo zokusebenza zamandla aphezulu-zidinga i-conductor cross{3}}elungiselelwe indawo yesigaba kanye nedizayini yokulahla ukushisa.
Intuthuko yezobuchwepheshe ezintanjeni ze-RF iyaqhubeka nokugqugquzela ukuthuthukiswa-kwamasistimu kagesi avela njalo. Kusukela kusayensi yezinto ezibonakalayo (njengezendlalelo zokufakwa kwe-nanocomposite) kuya ezenzweni ezintsha zesakhiwo (ezifana nemiklamo ye-coaxial enwebekayo), imingcele yazo yokusebenza ihlala iphushwa. Ngokuzayo, ngokuthuthuka kwezokuxhumana kwe-6G, ubuchwepheshe be-terahertz, nobunjiniyela bolwazi lwe-quantum, izintambo ze-RF zizothuthukela ekuthuthukisweni okukhulu-kwe-wideband, ukulahleka{5}}okuphansi kakhulu, namandla obuhlakani, abe ibhuloho eliyinhloko elixhumanisa umhlaba ophathekayo nowedijithali.