Question
Asked Oct 29, 2019

A transmitting antenna with an effective height of 100 m has a rms current of 100 A at a frequency of 300 kHz. Find the electric field strength at a distance of 10 km from the antenna.

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Step 1

The effective height of the antenna can be described as

h = 100 m
> (1)
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h = 100 m > (1)

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Step 2

The wavelength corresponding to the frequency of 300 kHz will be

3x108
2 =
= 1000 m--> (2)
300x 10
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3x108 2 = = 1000 m--> (2) 300x 10

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Step 3

The value of the electric field at a distance d=10 km away from the...

120Tx IXh
E.
V/m (3)
ms
ms
Im = Rms value of the current in A
dDistance from the antenna in m
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120Tx IXh E. V/m (3) ms ms Im = Rms value of the current in A dDistance from the antenna in m

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