Yam ntxwv impedance yog rau AC signals (los yog siab -frequency signals). Cov yam ntxwv impedance yog ib lub tswv yim nyob rau hauv ntev -kab kis. Thaum lub sij hawm tus txheej txheem ntawm cov teeb liab kis tau tus mob nyob rau hauv lub kis tau tus mob kab, ntawm ib tug taw tes uas lub teeb liab tuaj txog, lub kis tau tus mob kab thiab cov ntaub ntawv siv dav hlau yuav ntsib. Ib qho hluav taws xob tau tsim, thiab vim muaj qhov hluav taws xob hauv hluav taws xob, qhov tam sim no me me tam sim no raug tsim, thiab qhov me me tam sim no muaj nyob rau txhua qhov chaw hauv cov kab sib kis. Nyob rau tib lub sijhawm, lub teeb liab kuj muaj qee qhov hluav taws xob, yog li ntawd nyob rau hauv cov txheej txheem ntawm cov teeb liab kis tau tus mob, txhua lub ntsiab lus ntawm cov kab sib txuas yuav sib npaug rau qhov tsis kam, thiab qhov kev tawm tsam no yog cov yam ntxwv impedance ntawm cov kab sib txuas peb tau hais.
The continuity of the characteristic impedance (ρ) basically depends on the stability of the ratio of the distribution parameters L{{0}} and C0. We all know Ohm's law: U=RI, where R is the resistance or resistance load, in ohms (Ω). Resistance is related to the resistivity (also known as conductivity) of metal materials, but in the process of high-frequency signal transmission, we also need to understand the transmission of the physical medium (such as twisted pair, coaxial wire, waveguide) that transmits high-frequency signals characteristics, which are different from low-frequency signals, this transmission characteristic is related to the conductive material of the transmission medium (such as copper or silver), conductivity (resistivity), geometry (most commonly cylindrical), distributed inductance (L0), distributed capacitance (C0), insulating material (dielectric constant), etc. are all related, but the influence of these distribution parameters and the dielectric constant of insulating material is often not considered during low-frequency signal transmission.
