60 40 1- An Extra Low Frequency(ELF) radar antenna was established by NATO in the early...

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60 40 1- An Extra Low Frequency(ELF) radar antenna was established by NATO in the early 90s on a good ground system at a place in Didim district in the southern Aegean region in order to observe of the Mediterranean region. The electrical parameters of this radar antenna installed as a monopole antenna are given below. Working frequency of the antenna: 10 kHz, Total power: 1 MW, Length of the monopole antenna: 40 m A- Find the complete electric field expression of the antenna system, find the horizontal and vertical components of the electric field at the P1 point. B-As shown in the figure, explain whether the Magnetic Hertz Dipole (MHD) at the P2 point in the zy plane communicates with the radar antenna, find the electric field value at the P2 point. (Ignore the ground effect to the propagation of the electromagnetic field) Ground System Broadcasting center ELF RADAR Antenna 5 km 40 m MHD P2 P1 Ground 2- a) Write down the Helmholtz's equations for any dispersive, 1-lossy medium 2-dielectric medium. b) Explain the paradoxial relationship between skin depth of electromagnetic waves or particles with frequencies bigger than 1020 Hz DYDYMA city 60 40 1- An Extra Low Frequency(ELF) radar antenna was established by NATO in the early 90s on a good ground system at a place in Didim district in the southern Aegean region in order to observe of the Mediterranean region. The electrical parameters of this radar antenna installed as a monopole antenna are given below. Working frequency of the antenna: 10 kHz, Total power: 1 MW, Length of the monopole antenna: 40 m A- Find the complete electric field expression of the antenna system, find the horizontal and vertical components of the electric field at the P1 point. B-As shown in the figure, explain whether the Magnetic Hertz Dipole (MHD) at the P2 point in the zy plane communicates with the radar antenna, find the electric field value at the P2 point. (Ignore the ground effect to the propagation of the electromagnetic field) Ground System Broadcasting center ELF RADAR Antenna 5 km 40 m MHD P2 P1 Ground 2- a) Write down the Helmholtz's equations for any dispersive, 1-lossy medium 2-dielectric medium. b) Explain the paradoxial relationship between skin depth of electromagnetic waves or particles with frequencies bigger than 1020 Hz DYDYMA city

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