5 The spectrum assigned for video transmission to small dish

5. The spectrum assigned for video transmission to small dishes located for residential use is in which band?

a. S-Band (2-4 GHz)

b. C-Band (4-6 GHz)

c. Ku-Band (12-14 GHz)

Solution

Ka-band is having raw bandwidth of around 13 GHz (27-40 GHz) and some additional 9 GHz of K-band (18-27 GHz) typically used for Ka-band satellite downlinks, compares well with the 6 GHz of Ku-band [8][52]. The advantage of Ka-band over other forms of internet via satellite is that it only requires a dish antenna of size 65 cms×75cms. Additionally Ka-band uses spot beams for service via satellite, which makes better use of the available bandwidth than a C or Ku-band (12-18 GHz) satellite, i.e. more users can get higher level of services. At Ka-band the propagation impairment strongly limits the quality & availability service in satellite communications [8]. Attenuation due to rain plays a significant role in tropical regions [20], especially with a great diversity of climatic conditions in India. Currently in Indian region C and Ku-band frequencies are being used for commercial satellite communication applications. In future Ka-band will be used for wideband applications.