Raws li peb txhua tus paub, coaxial cable yog ib qho kev sib txuas lus dav dav nrog kev poob qis thiab kev sib cais siab.Lub coaxial cable muaj ob concentric cylindrical conductors sib cais los ntawm dielectric gaskets.Capacitance thiab inductance faib raws cov kab coaxial yuav tsim cov impedance faib nyob rau hauv tag nrho cov qauv, uas yog yam ntxwv impedance.
Qhov kev tiv thaiv poob raws li cov coaxial cable ua rau qhov poob thiab kev coj tus cwj pwm raws li qhov xav tau ntawm cable.Raws li kev sib xyaw ua ke ntawm cov yam ntxwv no, qhov poob ntawm coaxial cable thaum xa hluav taws xob (EM) lub zog yog tsawg dua li cov kav hlau txais xov hauv qhov chaw dawb, thiab kev cuam tshuam kuj tsawg dua.
(1) Qauv
Cov khoom siv coaxial cable muaj cov txheej txheem tiv thaiv sab nraud.Lwm cov ntaub ntawv txheej tuaj yeem siv sab nraum coaxial cable los txhim kho kev tiv thaiv ib puag ncig, EM shielding muaj peev xwm thiab yoog raws.Coaxial cable tuaj yeem ua los ntawm braided conductor stranded hlau, thiab ingeniously txheej, uas ua rau lub cable hloov tau yooj yim thiab reconfigurable, lub teeb thiab ruaj khov.Raws li ntev raws li tus neeg xyuas pib cylindrical ntawm coaxial cable tswj concentricity, dabtsi yog khoov thiab deflection yuav tsis cuam tshuam rau kev ua haujlwm ntawm lub cable.Yog li ntawd, coaxial cables feem ntau txuas nrog coaxial connectors siv cov ntsia hlau hom mechanisms.Siv lub torque wrench los tswj qhov nruj.
2) Txoj cai ua haujlwm
Cov kab coaxial muaj qee qhov tseem ceeb cuam tshuam txog cov yam ntxwv, uas txhais tau tias lawv daim ntawv thov muaj peev xwm ntawm daim tawv nqaij qhov tob thiab txiav tawm zaus.Qhov tob ntawm daim tawv nqaij piav qhia txog qhov tshwm sim ntawm cov teeb liab ntau dua uas nthuav tawm raws kab coaxial.Qhov siab dua qhov zaus, cov electrons ntau dua yuav txav mus rau tus neeg xyuas pib ntawm cov kab coaxial.Cov nyhuv ntawm daim tawv nqaij ua rau kom muaj zog attenuation thiab dielectric cua sov, ua rau qhov tsis kam ntawm cov kab coaxial ntau dua.Txhawm rau txo qhov poob los ntawm cov nyhuv ntawm daim tawv nqaij, coaxial cable nrog txoj kab uas hla loj tuaj yeem siv.
Pom tseeb, kev txhim kho kev ua haujlwm ntawm coaxial cable yog qhov kev daws teeb meem zoo nkauj dua, tab sis ua kom qhov loj ntawm coaxial cable yuav txo qhov ntau zaus uas cov coaxial cable tuaj yeem xa mus.Thaum lub wavelength ntawm EM zog tshaj lub transverse electromagnetic (TEM) hom thiab pib "thaws" raws cov coaxial kab mus rau transverse hluav taws xob 11 hom (TE11), lub coaxial cable txiav tawm zaus yuav raug generated.Hom zaus tshiab no coj qee yam teeb meem.Txij li thaum hom tshiab zaus tshaj tawm ntawm qhov sib txawv ntawm TEM hom, nws yuav cuam tshuam thiab cuam tshuam nrog TEM hom teeb liab kis los ntawm coaxial cable.
Yuav kom daws tau qhov teeb meem no, peb yuav tsum txo qhov loj ntawm coaxial cable thiab ua rau kom qhov kev txiav tawm ntau zaus.Muaj cov coaxial cables thiab coaxial txuas uas tuaj yeem ncav cuag millimeter yoj zaus - 1.85mm thiab 1mm coaxial connectors.Nws yog ib qho tsim nyog yuav tsum nco ntsoov tias kev txo qis lub cev loj kom hloov mus rau ntau zaus yuav ua rau kom poob ntawm coaxial cable thiab txo lub zog ua haujlwm.Lwm qhov kev sib tw hauv kev tsim cov khoom me me no yog tswj xyuas cov neeg kho tshuab kom nruj kom txo tau cov hluav taws xob tsis xws luag thiab impedance hloov raws txoj kab.Rau cov cables uas muaj qhov rhiab heev, nws yuav raug nqi ntau dua kom ua tiav qhov no.
Post lub sij hawm: Jan-05-2023