Kev qhia yooj yim ntawm coaxial cable

oaxial cable yog ib hom xov hlau thiab teeb liab kis kab. Feem ntau nws yog ua los ntawm plaub txheej txheej ntawm cov ntaub ntawv: sab hauv yog cov hlau tooj liab uas muaj hluav taws xob, thiab sab nrauv ntawm cov hlau tau nyob ib puag ncig los ntawm txheej yas (rau rwb thaiv tsev thiab dielectric). Muaj cov neeg nqa khoom zoo ib yam (feem ntau yog tooj liab lossis hlau phom), thiab tom qab ntawd cov khoom siv sab nrauv tshaj plaws yog siv cov tawv nqaij sab nraud ntawm tus neeg xyuas pib.

Cov kab hluav taws xob sib txuas tuaj yeem siv rau kev sib kis ntawm cov cim sib txawv thiab cov cim digital, thiab tsim nyog rau ntau yam kev siv, qhov tseem ceeb tshaj plaws uas yog tshaj tawm hauv TV, xov tooj sib nrug deb, sib txuas luv-nrug ntawm lub tshuab computer, thiab thaj chaw hauv cheeb tsam tes hauj lwm. Coaxial cable tau txhim kho sai raws li txhais tau tias nthuav tawm TV cov cim rau ntau txhiab tsev neeg. Qhov no yog cable TV. Ib txoj kab hluav taws xob TV tuaj yeem thauj kaum tawm lossis ntau pua lub TV hauv, thiab nws cov kis tau tuaj yeem ncav cuag kaum tawm kilometers. Coaxial cable tau yog ib feem tseem ceeb ntawm cov xov tooj nyob deb-deb. Niaj hnub no, nws ntsib kev sib tw nce los ntawm fiber ntau optics, thaj av microwaves thiab satellites