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For a TEM wave to propagate in a medium, the medium has to be

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in Electromagnetic Theory by (188k points)
For a TEM wave to propagate in a medium, the medium has to be

(a) Air

(b) Insulator

(c) Dispersive

(d) Non dispersive

This question was posed to me in semester exam.

Question is taken from Transverse Electric Magnetic Waves(TEM) in portion Waveguides of Electromagnetic Theory

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Best answer
The correct answer is (d) Non dispersive

Best explanation: The medium in which the TEM waves propagate has to be non- dispersive. This implies the phase velocity and the characteristic impedance has to be constant over a wide band.

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