Question

Assume the transmitter power is 1 W at 60GHz fed into the transmitter antenna. Horn antennas are used at the transmitter and receiver with G t ​ =29 dB,G r ​ =29 dB : (a) Calculate the free space path loss at 1 m,100 m, and 1000 m.

Answer 1

The free space path loss at 1 m, 100 m, and 1000 m can be calculated using the formula Path Loss(dB) = 20log(d) + 20log(f) - 147.55, where d is the distance in meters and f is the frequency in GHz. At 1 m, the path loss is -104.55 dB. At 100 m, the path loss is -74.55 dB. At 1000 m, the path loss is -44.55 dB.

Step-by-step explanation:

To calculate the free space path loss at different distances, we can use the formula:

Path Loss(dB) = 20log(d) + 20log(f) - 147.55

where d is the distance in meters and f is the frequency in GHz.

For a transmitter power of 1 W at 60 GHz:

1. At 1 m: Path Loss = 20log(1) + 20log(60) - 147.55 = -104.55 dB
2. At 100 m: Path Loss = 20log(100) + 20log(60) - 147.55 = -74.55 dB
3. At 1000 m: Path Loss = 20log(1000) + 20log(60) - 147.55 = -44.55 dB