Polyethylene Inner Outer conductor conductor a dr Current direction End view b. Figure 26.8 (Example 26.3) A coax- ial cable. (a) Polyethylene plastic fills the gap between the two conductors. (b) End view, showing current leakage.
Coaxial cables are used extensively for cable television and other electronic applications. A coaxial cable consists of two concentric cylindrical conductors. The region between the conductors is completely filled with polyethylene plastic as shown in 26.8a. Current leakage through the plastic, in the radial direction, is unwanted. (The cable is designed to
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