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The propagation constant for a lossless transmission line will be

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in Electromagnetic Theory by (188k points)
The propagation constant for a lossless transmission line will be

(a) Real

(b) Complex

(c) Real and equal to phase constant

(d) Complex and equal to phase constant

The question was asked in final exam.

My question comes from Transverse Electric Waves(TE) in chapter Waveguides of Electromagnetic Theory

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Correct choice is (d) Complex and equal to phase constant

The best I can explain: The propagation constant is given by γ = α + jβ, where α and β are the attenuation and phase constants respectively. For a lossless line, the attenuation constant is zero. Thus γ = jβ. It is clear that γ is complex and equal to β.

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