Characteristic Impedance Of Coaxial Cable's Body
Oct 09, 2018

Characteristic impedance of coaxial cable's body is composed of internal and external two conductors, for there is electric current flows through a conductor resistance and inductance, the voltage between conductors conductance and capacitance exist, these features are distributed along the route, called the distributed constant, due to the size precision in the manufacture and the influence of uneven medium material purity, although in the cable TV system requires the use of the coaxial cable of the characteristic impedance of 75 Ω, but usually the actual use of the characteristic impedance of the coaxial cable of Ω (75 + / - 5). Therefore, in order to prevent the signal energy reflection and achieve the best transmission effect, the terminal load impedance should be equal to the characteristic impedance of the cable.

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