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Duct propagation is due to which layer?

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in Antennas by (157k points)
Duct propagation is due to which layer?

(a) Temperature Inversion layer

(b) Higher atmospheric layer

(c) Ionospheric layer

(d) Surface water

The question was posed to me at a job interview.

My enquiry is from Space Wave Propagation topic in division Space Wave Propagation of Antennas

1 Answer

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Correct option is (a) Temperature Inversion layer

To explain I would say: Duct propagation is due to temperature inversion layer. Normal atmospheric temperature reduces at 6.5°C/km where as to provide duct wave propagation temperature must increase within 15-50m from earth surface. This layer occurs due to super refraction and at lower atmospheric layers.

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