Question

Terrestrial microwave links:

1. Name one issue that would necessitate the use of one or more repeaters
2. Name one drawback of using repeaters

Attenuation:

Which frequency would, in theory, be affected more by heavy rain:

1. 2.4 GHz or 80 GHz
2. why?

Answer 1

Terrestrial microwave links:

a. One major issue in signal transmission is problem of attenuation i.e. loss of signal strength as it covers more and more distance. To cope up with problem of attenuation, repeater is used which again improves the signal strength and output the signal with appropriate strength.

b. Repeater although improve signal strength, but disadvantage of using a wireless repeater is that the bandwidth of any computers connected to it get halves because of the time taken by repeater in  receiving the signal, processing it, and then rebroadcasting it.

Attenuation:

a. Frequency 80 GHz will suffer more from heavy rain.

b. This is because Rain attenuation is major problem in  microwave satellite communication specially for the frequency above 10 GHz and hence frequency 80 GHz will more suffer from Rain attenuation.

Please comment for any clarification.