Received Power Calculator:
Enter the values of gain of receiving antenna, G, transmitted power, Pt(W), frequency of signal, f(Hz) and distance from transmitter to receiver, d(m) to determine the value of Received power, Pr(W).
Received Power Formula:
Received power, Pr(W) in watts is calculated by dividing the product of gain of receiving antenna, G, transmitted power, Pt(W) in watts by the product of square of frequency of signal, f(Hz) in Hertz and square of distance from transmitter to receiver, d(m) in metres.
Received power, Pr(W) = G * Pt(W) / f2(Hz) * d2(m)
Pr(W) = received power in watts, W.
G = gain of receiving antenna.
Pt(W) = transmitted power in watts, W.
f(Hz) = frequency in Hertz, Hz.
d(m) = distance in metres, m.
Received Power Calculation:
1. Finding Received Power:
Given:
Transmitted power Pt(W) = 100 W
Gain G = 2
Frequency f(Hz) = 300 MHz (300 * 106 Hz)
Distance d(m) = 10 m
Received power, Pr(W) = G * Pt(W) / f2(Hz) * d2(m)
Pr(W) = 2 * 100 / (300 * 106 )2 * 102
Pr(W) = 200 / 9 * 1016 * 100
Pr(W) = 200 / 9 * 1018
Pr(W) = 2.22 * 10-17W.
2. Finding Distance:
Given:
Received power Pr(W) = 0.001 W
Transmitted power Pt(W) = 50 W
Gain (G) = 1.5
Frequency f(Hz) = 150 MHz (150 * 106 Hz)
Received power, Pr(W) = G * Pt(W) / f2(Hz) * d2(m)
d(m) = G * Pt(W) / f2(Hz) * Pr(W)
d(m) = √(1.5 * 50 /(150 * 106)2 * 0.001)
d(m) = √(75 / 2.25 * 1016 * 0.001)
d(m) = √(75 / 2.25 * 1013)
d(m) = 1.45 * 106m.