Which of the following is the expression for tilt angle?(a) \(θ=1/2 tan^{-1}⁡(\frac{σ}{ωϵ})\)(b) \(θ=2 tan^{-1}⁡(\frac{σ}{ωϵ})\)(c) \(θ=1/2 tan^{-1}⁡(\frac{σϵ}{ω})\)(d) \(θ=2 tan^{-1}⁡(\frac{wϵ}{σ})\)The question was posed to me in an interview.Query is from Radio Wave Propagation topic in section Radio Wave Propagation of Antennas

Which of the following is the expression for tilt angle?(a) \(θ=1/2 t

1.	Which of the following is the expression for tilt angle?(a) \(θ=1/2 tan^{-1}⁡(\frac{σ}{ωϵ})\)(b) \(θ=2 tan^{-1}⁡(\frac{σ}{ωϵ})\)(c) \(θ=1/2 tan^{-1}⁡(\frac{σϵ}{ω})\)(d) \(θ=2 tan^{-1}⁡(\frac{wϵ}{σ})\)The question was posed to me in an interview.Query is from Radio Wave Propagation topic in section Radio Wave Propagation of Antennas
Answer» Right answer is (a) \(θ=1/2 tan^{-1}⁡(\frac{σ}{ωϵ})\) The explanation is: The wave tilt of the surface wave DEPENDS on the CONDUCTIVITY of EARTH, permittivity and ANGULAR frequency of the waves. Expression for tilt angle is \(θ=1/2 tan^{-1}⁡(\frac{σ}{ωϵ}). \)

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