Sesiphi isinxibelelanisi esidibana naso nentambo ye-50 ohm impedance coaxial cable?

I-50 ohm coaxial cable efana ne-RG58, RG174, RG 316, 5D-FB ehambelanayo ngokuqhelekileyo isebenzisa ujongano lwe-SMA okanye lwe-BNC. ...

Kwiisekethe ze-RF, ukuhambelana kokumelana kwe-50 ohms ngumgangatho oqhelekileyo kuba uthintelo lwezixhobo ezininzi ze-RF kunye nokufakwa kwesixhobo okanye amazibuko aphumayo ngokusisiseko ngama-50 ohms. Olu luyilo luqinisekisa ukusebenza kakuhle kunye nokuzinza kokuhanjiswa komqondiso.

Umzekelo, i-50 Ω isixhasi somthwalo/50 Ω i-impedance iadaptha isebenzisa ujongano oluqhelekileyo lwe-BNC, olunokutshatisa nayiphi na i-oscilloscope ukuqinisekisa imfezeko yomqondiso kunye nokungaguquguquki. Ukongezelela, iimveliso ezifana neeprobes zangoku, iinkqubo zangoku, iikhoyili ze-Roche, kunye ne-probes ezahlukeneyo zihlala zisebenzisa i-BNC interfaces ukuqinisekisa umgangatho kunye nokusebenza kakuhle kokuhanjiswa kwesignali.

Ukulinganisa i-impedance yinto ephambili ekuqinisekiseni ukusebenza kakuhle xa udibanisa izixhobo zombane. Kwintsimi yefrikhwensi kanomathotholo, ukusetyenziswa kwe-50 ohm i-impedance ye-impedance ingcingo ixhaphake kakhulu, ngakumbi kwizicelo ezifuna ukuhanjiswa kweempawu ze-microwave ze-high-frequency. Ngokusebenzisa i-interface ye-BNC, izibonakaliso ziyakwazi ukuhanjiswa ngokufanelekileyo ukusuka kumthombo wesignali ukuya kumthwalo ngelixa uphepha ukubonakalisa umqondiso, ngaloo ndlela kuphuculwe ukusebenza kakuhle kwamandla.

Ngamafutshane, i-50 ohm i-impedance ehambelanayo ikakhulu isebenzisa ujongano lwe-BNC, oluye lwasetyenziswa ngokubanzi kwiisekethe zeRF ngenxa yeempawu ezisebenzayo nezizinzileyo zokuhambisa umqondiso.