Ukukhethwa kwezixhumi ze-RF coaxial kufanele kucabangele kokubili izidingo zokusebenza nezici zomnotho.Ukusebenza kufanele kuhlangabezane nezidingo zesistimu kagesi.Ngokomnotho, kufanele ihlangabezane nezidingo zobunjiniyela benani.Ngokomthetho, izici ezine ezilandelayo kufanele zicatshangelwe lapho kukhethwa izixhumi.Okulandelayo, ake sibheke.
Isixhumi se-BNC
(1) Isixhumi esibonakalayo (i-SMA, i-SMB, i-BNC, njll.)
(2) Ukusebenza kukagesi, ukuhlanganisa ikhebula nekhebula
(3) Ifomu lokunqanyulwa (ibhodi le-PC, ikhebula, iphaneli, njll.)
(4) Isakhiwo semishini kanye nokunameka (ezempi nezohwebo)
1. Isixhumi esibonakalayo
I-interface yesixhumi ngokuvamile inqunywa ukusetshenziswa kwayo, kodwa kufanele ihlangabezane nezidingo zokusebenza zikagesi kanye nemishini ngesikhathi esifanayo.
Isixhumi sohlobo lwe-BMA sisetshenziselwa ukuxhumeka okungaboni kwesistimu ye-microwave enamandla aphansi enefrikhwensi efika ku-18GHz.
Izixhumi ze-BNC ziyizixhumanisi zohlobo lwe-bayonet, ezisetshenziswa kakhulu ekuxhumekeni kwe-RF ngamafrikhwensi angaphansi kuka-4GHz, futhi asetshenziswa kakhulu ezinhlelweni zenethiwekhi, amathuluzi nezinkambu zokuxhumanisa amakhompyutha.
Ngaphandle kwesikulufu, isixhumi esibonakalayo se-TNC siyefana nese-BNC, esingase sisetshenziswe ku-11GHz futhi sisebenza kahle kakhulu ngaphansi kwezimo zokudlidliza.
Izixhumi zesikulufa ze-SMA zisetshenziswa kakhulu kwezokundiza, irada, ukuxhumana nge-microwave, ukuxhumana kwedijithali neminye imikhakha yezempi neyomphakathi.I-impedance yayo ingu-50 Ω.Uma usebenzisa ikhebuli eguquguqukayo, imvamisa ingaphansi kuka-12.4GHz.Uma usebenzisa ikhebula eliqinile kancane, imvamisa ephezulu ingu-26.5GHz.I-75 Ω inethuba elibanzi lohlelo lokusebenza ekuxhumaneni kwedijithali.
Ivolumu ye-SMB incane kunaleyo ye-SMA.Ukuze ufake isakhiwo esizikhiyayo futhi wenze ukuxhumana kube lula, uhlelo lokusebenza olujwayelekile kakhulu ukuxhumana kwedijithali, okuwukungena esikhundleni se-L9.I-50N yezohwebo ihlangana ne-4GHz, futhi i-75 Ω isetshenziselwa u-2GHz.
I-SMC ifana ne-SMB ngenxa yesikulufu sayo, esiqinisekisa ukusebenza kwemishini okuqinile kanye nobubanzi befrikhwensi ebanzi.Isetshenziswa kakhulu endaweni yezempi noma ephezulu yokudlidliza.
Isixhumi sesikulufu sohlobo lwe-N sisebenzisa umoya njengesivikelo esinezindleko eziphansi, i-impedance engu-50 Ω no-75 Ω, kanye nemvamisa yokufika ku-11 GHz.Ivamise ukusetshenziswa kumanethiwekhi esifunda, ukudluliswa kwemidiya kanye namathuluzi okuhlola.
Izixhumi zochungechunge lwe-MCX ne-MMCX ezinikezwe i-RFCN zincane ngosayizi futhi zithembekile lapho zixhumana khona.Imikhiqizo encanyelwayo ukuhlangabezana nezidingo ze-intensive and miniaturization, futhi ibe namathemba abanzi okusebenza.
2. Ukusebenza kukagesi, ukuhlanganisa ikhebula nekhebula
A. Ukuphazamiseka: Isixhumi kufanele sifane nokuphazamiseka kwesistimu nekhebuli.Kufanele kuqashelwe ukuthi akuzona zonke izixhumi ezihlanganayo ezihlangabezana nokuphazamiseka okungu-50 Ω noma okungu-75 Ω, futhi ukungafani kokuphazamiseka kuzoholela ekonakaleni kokusebenza kwesistimu.
B. I-Voltage: qinisekisa ukuthi amandla aphezulu okumelana nesixhumi angeke adlulwe ngesikhathi sokusetshenziswa.
C. Ubuningi befrikhwensi yokusebenza: isixhumi ngasinye sinomkhawulo wefrikhwensi enkulu yokusebenza, futhi amanye amadizayini okuthengisa noma angama-75n anomkhawulo wokusebenza obuncane obuncane.Ngaphezu kokusebenza kukagesi, uhlobo ngalunye lwesixhumi esibonakalayo lunezici zalo ezihlukile.Isibonelo, i-BNC ukuxhumana kwe-bayonet, okulula ukuyifaka futhi eshibhile futhi esetshenziswa kabanzi ekuxhumekeni kukagesi okusebenza kancane;Uchungechunge lwe-SMA ne-TNC luxhunywe ngamantongomane, ahlangabezana nezidingo zendawo yokudlidliza ephezulu kuzixhumi.I-SMB inomsebenzi wokuxhumana okusheshayo nokunqanyulwa, ngakho ithandwa kakhulu ngabasebenzisi.
D. Ikhebula: Ngenxa yokusebenza kwayo okuyisivikelo okuphansi, ikhebuli ye-TV ivamise ukusetshenziswa kumasistimu acabangela ukuvinjelwa kuphela.Uhlelo lokusebenza olujwayelekile luthi lwe-TV.
Ikhebuli ye-TV eguquguqukayo iwuhlobo lwekhebula le-TV.Ine-impedance eqhubekayo kanye nomphumela omuhle wokuvikela.Ingagotshwa futhi inenani eliphansi.Isetshenziswa kabanzi embonini yamakhompiyutha, kodwa ayikwazi ukusetshenziswa ezinhlelweni ezidinga ukusebenza kokuvikela okuphezulu.
Izintambo eziguquguqukayo ezivikelekile zisusa i-inductance kanye ne-capacitance, ezisetshenziswa kakhulu kumathuluzi nezakhiwo.
Ikhebula le-coaxial eliguquguqukayo seliphenduke ikhebula elivamile lokudlulisa elivaliwe ngenxa yokusebenza kwayo okukhethekile.I-coaxial isho ukuthi isiginali kanye ne-grounding conductor ziku-eksisi efanayo, futhi i-coaxial yangaphandle yakhiwe ngocingo olulukiwe olucolekile, ngakho-ke ibizwa nangokuthi ikhebula le-coaxial elilukiweyo.Le ntambo inomphumela omuhle wokuvikela ku-conductor omaphakathi futhi umphumela wayo wokuvikela uncike ohlotsheni lwentambo ephothiweyo kanye nobukhulu bongqimba olulukiwe.Ngaphezu kokumelana ne-voltage ephezulu, le khebula ibuye ifanele ukusetshenziswa emazingeni aphezulu kanye nokushisa okuphezulu.
Amakhebuli angama-coaxial aqinile kancane ashintsha ungqimba olulukiweyo ngamagobolondo ashubhu, enza ngempumelelo ukonakala komthelela ongemuhle wokuvikela wezintambo ezilukiwe kumafrikhwensi aphezulu.Izintambo eziqinile kancane zivame ukusetshenziswa kumafrikhwensi aphezulu.
E. Ukuhlanganisa ikhebula: Kunezindlela ezimbili eziyinhloko zokufakwa kwesixhumi: (1) ukushisela ikhondakta emaphakathi kanye nokujiya ungqimba oluyisivikelo.(2) Khipha i-conductor emaphakathi kanye nongqimba oluyisivikelo.Ezinye izindlela zithathwe kulezi zindlela ezimbili ezingenhla, njengokushisela i-conductor emaphakathi kanye nokucwilisa ungqimba oluvikelayo.Indlela (1) isetshenziswa ezimweni ngaphandle kwamathuluzi okufaka akhethekile;Ngenxa yokusebenza kahle okuphezulu kanye nokusebenza okuthembekile kokunqanyulwa kwendlela yokuhlanganisa i-crimping, kanye nomklamo wethuluzi elikhethekile lokugwedla kungaqinisekisa ukuthi ingxenye ngayinye yempethu yekhebula eqoqiwe iyafana, ngokuthuthukiswa kwethuluzi lokuhlanganisa elingabizi kakhulu, ungqimba lwe-crimping shielding. womqhubi wesikhungo sokushisela uzothandwa kakhulu.
3. Ifomu lokunqanyulwa
Izixhumi zingasetshenziselwa izintambo ze-coaxial ze-RF, amabhodi wesekethe aphrintiwe kanye nezinye izixhumanisi zokuxhuma.Ukuzijwayeza kufakazele ukuthi uhlobo oluthile lwesixhumi lufana nohlobo oluthile lwekhebula.Ngokuvamile, ikhebula eline-diameter encane yangaphandle ixhunywe nezixhumi ezincane ze-coaxial ezifana ne-SMA, i-SMB ne-SMC.4, Isakhiwo Mechanical kanye enamathela
Isakhiwo sesixhumi sizothinta kakhulu intengo yaso.Idizayini yesixhumi ngasinye ihlanganisa indinganiso yezempi kanye nezinga lezohwebo.Izinga lezempi likhiqiza zonke izingxenye zethusi, ukufakwa kwe-polytetrafluoroethylene, kanye nokufakwa kwegolide kwangaphakathi nangaphandle ngokuya nge-MIL-C-39012, ngokusebenza okuthembeke kakhulu.Idizayini ejwayelekile yezentengiselwano isebenzisa izinto ezishibhile njengokuphonswa kwethusi, ukufakwa kwe-polypropylene, ukunamathela kwesiliva, njll.
Izixhumi zenziwe ngethusi, i-beryllium yethusi nensimbi engagqwali.Ikhondakta emaphakathi ngokuvamile imbozwe ngegolide ngenxa yokumelana kwayo okuphansi, ukumelana nokugqwala kanye nokumelana komoya okuhle kakhulu.Izinga lezempi lidinga ucwecwe lwegolide ku-SMA naku-SMB, kanye nokufakwa kwesiliva ku-N, TNC kanye ne-BNC, kodwa abasebenzisi abaningi bakhetha ukufakwa kwe-nickel ngoba isiliva kulula ukusikhipha i-oxidize.
Izixhumi zokuxhuma ezivame ukusetshenziswa zifaka i-polytetrafluoroethylene, i-polypropylene kanye ne-polystyrene eqinile, lapho i-polytetrafluoroethylene inokusebenza okungcono kakhulu kwe-insulation kodwa izindleko zokukhiqiza eziphezulu.
Izinto kanye nesakhiwo sesixhumi sithinta ubunzima bokucubungula nokusebenza kahle kwesixhumi.Ngakho-ke, abasebenzisi kufanele bakhethe ngokunengqondo isixhumi esisebenza kangcono nesilinganiso senani ngokuya ngendawo yohlelo lwabo lokusebenza.
Isikhathi sokuthumela: Feb-07-2023