Assertion: wire's advantage | /r/CapableOf | use the surface wave mode
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text: As for any transmission line, at very high frequencies, the increased losses of the metal conductor, despite the advantage obtained using the surface wave mode, are increased, however because conductor losses are inversely proportional to the square of line impedance, this mode can achieve much lower losses, no more than a few percent of a 50 ohm coaxial line having the same center conductor.