Dab tsi yog qhov kev sib kis tsis kawg?
Dab tsi yog qhov kev sib kis tsis kawg?

Video: Dab tsi yog qhov kev sib kis tsis kawg?

Video: Dab tsi yog qhov kev sib kis tsis kawg?
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Ib kab infinite yog a kab nyob rau hauv uas qhov ntev ntawm lub kis kab mob yog tsis kawg . Ib finite kab , uas yog txiav nyob rau hauv nws cov yam ntxwv impedance, yog hu ua kab infinite . Yog li ntawd rau ib kab infinite , input impedance yog sib npaug rau cov yam ntxwv impedance.

Ib yam li ntawd, koj tuaj yeem nug, hom kab sib kis yog dab tsi?

Hom kab sib kis muaj xws li kab sib txuas (nqaj kab, twisted khub), coaxial kab , thiab cov kab sib kis xws li stripline thiab microstrip. Qhov siab dua qhov zaus ntawm electromagnetic tsis txav los ntawm ib qho muab kab los yog nruab nrab, qhov luv luv lub wavelength ntawm cov nthwv dej.

Kuj Paub, vim li cas ib txoj kab sib luag zoo ib yam los ntawm kab ntev infinitely raws li pom los ntawm qhov chaw? Nyob rau hauv qhov tseeb, ib tug terminating resistor sib phim lub ntuj impedance ntawm qhov kis tau tus mob kab ua cov kab “pom” ntev infinitely los ntawm qhov kev xav ntawm lub qhov chaw , vim hais tias ib tug resistor muaj peev xwm mus mus ib txhis dissipate zog nyob rau hauv tib yam txoj kev kis tau tus mob kab ntawm tsis kawg ntev yog tau mus ib txhis nqus

Hais txog qhov no, thaum twg tuaj yeem cuam tshuam cov kab sib kis tau raug tsis quav ntsej?

Tau kawg yog tias koj daim ntawv thov xav tau ntau dua, koj yog pub dawb los coj koj tus kheej txoj cai ntawm tus ntiv tes xoo, xws li nkaus xwb tsis quav ntsej txog kev sib kis kab mob thaum lub kab qhov ntev yog tsawg dua 1/20 lossis 1/50 ntawm lub wavelength.

Vim li cas cov kab kis tau zoo heev inductive?

Yog vim li cas Transmission Line Inductance Siab muaj nuj nqis alternating tam sim no thaum ntws los ntawm tus neeg xyuas pib teeb tsa magnetic flux ntawm siab lub zog nrog alternating xwm. Qhov no siab muaj nuj nqis alternating magnetic flux ua rau ib qho kev sib txuas nrog lwm cov conductors uas nyob ib sab parallel mus rau lub ntsiab conductor.

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