Question
Asked Oct 21, 2019

Find out the Electric field strength 90 km away from a transmitting antenna transmitting 50 kW power.

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Step 1

Write the expression to find the electric field strength at a point from a transmitting antenna as follows:

30PG
E
(1)
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30PG E (1)

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Step 2

Consider the linear gain of antenna (G) as 1.

Substitute 90 km for R, 50 kW for P, and 1 for G in Equation (1) to o...

30(50kW)(1)
E =
(90km)
s0(50x103 W)(1)
(90x10 m
0.0136 V/m
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30(50kW)(1) E = (90km) s0(50x103 W)(1) (90x10 m 0.0136 V/m

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