State its significance in wireless communication. What is maximum power received at a distance of 0.5 Km over free space for 1GHz frequency. The system consists of transmitting antenna with 2.5dB gain & antenna is fed with 150W power.

As per the given data

$\boxed{\frac{P_r}{P_t}= \left(\frac{λ}{4πR}\right)^2G_{0t} G_{0r}}$

R = 0.5 Km

Gt = 2.5dB = 1.33

To receive Max power Gr must be =1

Pt = 150W

F= 1GHz

$λ = C/F = (3 x 10^8) / (1x 10^9) = 0.3$

$Pr = 1.33 × …