A 1-m-long dipole is excited by a 1-MHz current with an amplitude of 12 A. (a) State the electric and magnetic field expressions that represent the wave radiated by a dipole antenna. (b) Under what condition the field expressions are correct? (c) What is the average power density radiated by the dipole at a distance of 5 km in a direction that is 45° from the dipole axis?

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A 1-m-long dipole is excited by a 1-MHz current with an amplitude of 12 A.
(a) State the electric and magnetic field expressions that represent the wave radiated by
a dipole antenna.
(b) Under what condition the field expressions are correct?
(c) What is the average power density radiated by the dipole at a distance of 5 km in a
direction that is 45° from the dipole axis?
Transcribed Image Text:A 1-m-long dipole is excited by a 1-MHz current with an amplitude of 12 A. (a) State the electric and magnetic field expressions that represent the wave radiated by a dipole antenna. (b) Under what condition the field expressions are correct? (c) What is the average power density radiated by the dipole at a distance of 5 km in a direction that is 45° from the dipole axis?
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