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What is the Importance of characteristics impedence of co axial cable at high frequency?
Wiki User
∙ 14y ago
The characteristic impedance is rather important. Input and output equipment connected with co-axial cable should all be at the same impedance for efficient power transformation and a clean wave shape. All co-axial cables have a characteristic impedance due to their physical dimensions. The main contributor is the distance from the center conductor to the braid. This is mainly capacitance and stays constant. As the frequency goes higher across this capacitance; the effective impedance seems to decrease. As the impedance to the braid decreases; less power gets to the output end of the cable. Even worse, the wave shape gets distorted. Even a digital signal rounds off and looks like it is leaning. Impedance is rated at a particular frequency band.
Wiki User
∙ 14y ago
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